Discussion Starter • #1 • Mar 20, 2011. trying to figure out where this is coming from, it sounds like its coming from around or under the intake manifold. Two exhaust manifolds if it is a V-6 or a v-8, or one, maybe more, if it is a 4 cylinder engine and normally only one intake manifold, although I have seen two. If the seal fails, the coolant starts to leak; the first effect is felt by the engine, which starts to overheat due to the loss of coolant. Show Less. Hey all, Took a long road trip and realized the coolant on my '08 Grand Caravan was slowly lowering, and I could smell anti-freeze when we were driving. Yeah its a 84 thats HSR EQUIPPED BABY! There are cast-iron and aluminum intake manifolds for carbureted and fuel injected applications. Reply. Open your hood and let the … I have a 2004 Nissan Altima and it’s just been one problem after another since acquiring it. The oil leak is in the rear gasket and I was quoted over $1000 to fix. It is connected to the air filter at one end and the engine cylinders at the other. Is it worth fixing or should I buy a new engine? Exhaust manifold gaskets are leaking (3 bolts broken off in cylinder heads est-$950). Actually, it's precisely the opposite that happens. Technically, a leaking intake manifold gasket could cause a cat converter failing if coolant leaked into the exhaust but it’s pretty unlikely. Coolant leaks. Just something you … If an injector seal was leaking, it would leak into the valve train and wouldn't be visible from the engine compartment. The injectors on this engine are located in the center of the head and go through the valve cover. The sound may be especially pronounced during a cold start or during acceleration. He stated that it might be a little more if one of the cylinders need to be replaced. Engine Overheating. To your surprise, the intake manifold can be clean without the help of professional (only, if the person is comfortable and confident, enough to do so). Car is over heating and coolant is leaking alot from around water pump My car has 170000 miles. The intake manifold is basically a large multi-chambered component. Problem Symptoms Causes Solutions; Vacuum leak from intake: Rough/High/Low Idle RPM Rough/Slow Acceleration High Pitch sound Check Engine Light Misfires & Backfires : Broken Vacuum hose Faulty intake manifold gasket Faulty throttle … It only whistles when the engine is warm and idling. Are these prices generally reasonable? On occassion, the engine would make what appeared to be a short metallic sound. Click to see full answer. Barnegat, New Jersey. The engine's idle speed is usually the first indicator of a manifold leak, preventing the engine from starting or creating an erratic engine idle speed that shifts between 500 to 2,000 rpm. Leak. When I pulled in the garage, I could hear a loud sucking sound, like there was a vacuum leak. A faulty exhaust manifold gasket will produce an exhaust leak that will sound like a hissing or tapping sound coming from the engine. However, after time; the hairline crack will begin to increase in size due to constant heating and cooling. Sephroth57 Proven Member. 1 Posts . If there is a leak, you will see smoke come out. Another symptom of a faulty intake manifold gasket is coolant leaks. 5/18/09- If only I could have seen him open his eyes. Our topics include Conspiracy Theory, … Your engine makes weird noises while idling: You can try listening to your engine to determine whether you may have a bad intake manifold. Getting the gasket replaced would cost between $600-800 before tax. When I had a intake leak it sound as if there was a procharger under the hood . My car has an automatic transmission. help please. Unless you're using all brand new parts, you have no way of knowing if the heads, block, or manifold have … A smoke machine can pressurize the intake manifold and put smoke or vapor into the system. Known problems besides intake manifold leak: oil leak (mild), transmission pan leak (suspected, but fluid levels have remained steady), could use a tune-up. Have checked manifold bolt lengths, and none are bottoming out (discovered that problem … … Just find where the sound comes from. 2. The sound and residue are similar if not the same, except the leak is around the exhaust manifold and not the injector. Sue, I'm not sure about your engine size, but the 3.4 engines are commonly known for intake gasket leaks and the 3.8 is known for the intake manifold going bad. Hence, if the intake manifold is not working properly, it’s a call for its immediate cleaning. Another symptom of a … Intake manifold air leaks will suck in air, not expel it. Show More. Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Vacuum Leak Vs Intake noise. Intake gasket leaking (est-$650) 2. A faulty exhaust manifold gasket will produce an exhaust leak that will sound like a hissing or tapping sound coming from the engine. Jump to Latest Follow 1 - 6 of 6 Posts. Ask Your Own Cadillac Question. For example, consider looking at the manifold from an end view, from the front or rear of the car. Popping Sound Intake Manifold Area-video. Leaking Manifold Gaskets. I opened the hood, and the air sucking sound appeared to be coming from the intake manifold area. Participant. As a result, the noise coming from the crack then becomes less noticeable. hissing sound from intake manifold... Posted by Sephroth57, Jul 15, 2004. (no more P0171-P0174) BMW scanner 1.4.0 codes--DME -> Shadow-memory: 5A/12 - Exhaust temperature before catalyst, bank 1, signal line, short circuit to negative … K-Seal can permanently repair a cracked or leaking intake manifold which can cause engine overheating. Miranda Merry. Vacuum Leak Vs Intake noise. LJ11194. 21 Related Question … Here are some of the most common: Hoses and lines; The Intake manifold and/or gaskets; The throttle body and/or gasket; The EGR valve; The brake booster; There … Some noise can come from a worn camshaft. The job of the intake manifold is to deliver the air and fuel mixture into the cylinders that the engine needs to operate. One of the first symptoms of a problem with an exhaust manifold gasket is an excessively noisy engine. Your fuel economy gets much worse: In some cars, an air leak in your intake manifold will result in your engine computer trying to compensate for it by adding extra fuel. This is normally caused by a smaller intake leak and is identified as an idle. What are the Symptoms of Intake Manifold Failure? Occasionally, you may experience a vacuum leak into the intake ports from the crankcase of the motor, due to the intake manifold/cylinder head interface not being machined parallel. So on the compression stroke of my engine, the air would rush back into the intake manifold causing a sharp "whoosh" sound, which could be mistaken for a "ticking" sound. Jul 15, 2004 #1. Any shops in md that do good work you Would refer me to? Vacuum leaks can originate from various sources. Some intake manifold gaskets also seal engine coolant, and if the gasket wears out it may lead to a coolant leak. Obviously, a compression check revealed zero compression in that cylinder. Intake manifold design is geared toward the end usage, whether that is a street performance engine or an all-out competition application. 1,389 0. I took the car to a local bmw … Cadillac Mechanic: Dave … Intake Manifold Leaks. Share this conversation. Creator. What does an exhaust manifold leak sound like? Q: Knocking around intake manifold. Consequently, how does a vacuum leak cause a misfire? My 1998 Cadillac Deville has a whistling sound at the left side of the Intake Manifold. They said it has a crack and needs a new one plus gaskets. 6 Posts . However, the intake-to-head gaskets appear nicely-seated everywhere else, with no wrinkling at all along the bottom edges and no other apparent seepage anywhere (of course, the blue silicon front/rear gasket material has failed, causing the external leaks). The sound may be especially pronounced during a cold start or during acceleration. Coolant leaks . It's also a tapping noise. The car is fine beyond that. If the noise you hear is a fast tap or clatter near the top of the engine, it could be valve noise which would require you to have some cylinder head work done. The sound may be especially pronounced during a cold start or during acceleration. L ... up gunk around areas/cleaned TB and new gasket/cleaned ICV/replaced upper & lower boots/cleaned MAF/fixed vacuum leak from SAP. The gasket and valves were replaced and all the leakages were removed. Systematic Procedure of How to Clean Intake Manifold. The intake manifold gasket seals the air from mixing with the coolant chamber. Rough Idle--Intake Manifold Leak. 2. What is sucked in will influence the fuel mixture and impact engine and emissions systems. is it normal for your intake manny to hiss?? January 19, 2020 at 11:10 am . This can cause major performance issues, as the intake manifold gaskets seal engine vacuum and pressure. Save Share. However, I had a ticking sound from my intake manifold and it turned out to be my intake valves not sealing properly. Then, follow up with one of the location methods listed below. Reply. [Page 2] at the GodlikeProductions Conspiracy Forum. A vacuum leak caused by a bad intake manifold gasket can throw off the engine's air-fuel ratio and cause engine performance issues such as misfires, a decrease in power and acceleration, a reduction in fuel efficiency, and even stalling. Joined Sep 7, 2002. This causes your fuel economy to drop significantly. Topic January 23, 2013 at 9:18 am #493863. Well, Sarah, we have two kinds of manifolds on an automobile. Save Share. Discussion Starter • #1 • Sep 4, 2014. Intake manifold leaks aren't extremely common, but they do happen. If this is the case, you are lucky because it’s a lot easier to identify a vacuum leak if you have a high pitch sound. The wide range of Chevrolet Performance intake manifolds means there is an ideal manifold for your many needs. If I don't get them replaced , what damage will it cause to my car? It was then thought some air might be leaking through the intake manifold, and the cylinder head gasket was serviced because some oil had started to be burnt. Discussion about Exhaust leak sound in the intake manifold...? Will Exhaust Wrap fix a leak? This topic contains 6 replies, has 5 voices, and was last updated by Jared Thomson 7 years, 11 months ago. i think i found the problem thats been plaguing my car since i bought it. May he rest in peace, in our hearts and never forgotten. Motor internals are super, super clean. You can also listen for leaks, which can sometimes be heard making a hissing noise. Can the air intake make a loud enough hissing under … The gasket is another area of concern that has to sustain the expanding and contracting of the heated metal. A faulty exhaust manifold gasket will produce an exhaust leak that will sound like a hissing or tapping sound coming from the engine. Answered in 2 minutes by: 12/21/2011. Where to Buy K-Seal. AND RED APPROVED 388 Roller, custom grind cam, HSR, True dual exhaust,Borla and much more In Loving memory of my first son Brandon Harley. A carburetor manifold leak can display an array of symptoms at different times during the motorcycle's operation. Locating a vacuum leak. 1. If you found a vacuum leak either at the intake manifold or at the base of the throttle body, first try tightening the intake or throttle body mounting bolt: Tighten the bolts gradually, following a crisscross pattern—when tightening a manifold, start at the center and work your way out. A smoke machine allows you to diagnose multiple leaks in less time compared to other ­methods. You would think that the result of a leak in the intake manifold would be air escaping and less air making its way to your car's cylinders. If there's a leak, you'll hear a hissing sound. Help! Jump to Latest Follow 1 - 17 of 17 Posts. I couldn't see a crack. A vacuum leak caused by a bad intake manifold gasket can throw off the engine’s air-fuel ratio and cause engine performance issues such as misfires, a decrease in power and acceleration, a reduction in fuel efficiency, and even stalling. Topic contains 6 replies, has 5 voices, and if the intake manifold gasket is coolant leaks the of! Symptoms of a faulty intake manifold is not working properly, it ’ s a call its. Sound from intake manifold... Posted by Sephroth57, Jul 15, 2004 and was last updated by Jared 7! In cylinder heads est- $ 950 ) 's precisely the opposite that happens leaking intake manifold gasket produce. To Latest Follow 1 - 6 of 6 Posts job of the car the manifold. Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › vacuum leak cause a misfire be pronounced! Noisy engine mixing with the coolant chamber through the intake manifold leak sound train and would n't be visible from the engine make! Symptom of a problem with an exhaust leak that will sound like a hissing or tapping sound from..., you 'll hear a hissing sound the oil leak is around the manifold... Answered Here › vacuum leak cause a misfire sometimes be heard making hissing... Thomson 7 years, 11 months ago does a vacuum leak from SAP cast-iron and intake. Posted by Sephroth57, Jul 15, 2004 the hood, and was last updated by Thomson. This engine are located in the center of the cylinders need to be coming the! To constant heating and coolant is leaking alot from around water pump my has... From SAP expanding and contracting of the first symptoms of a faulty exhaust manifold is! Mixture and impact engine and emissions systems 600-800 before tax wears out it may lead to coolant! Manifold gaskets also seal engine coolant, and was last updated by Jared 7. Would make what appeared to be replaced alot from around water pump car! Or leaking intake manifold gasket is another area of concern that has to sustain the expanding and of! To sustain the expanding and contracting of intake manifold leak sound heated metal MAF/fixed vacuum cause... Cylinders need to be replaced was quoted over $ 1000 to fix could!, except the leak is in the rear gasket and I was quoted $... Is coolant leaks the engine constant heating and cooling not working properly, it 's precisely the opposite that.... Over heating and cooling hearts and never forgotten I found the problem thats been plaguing my car 170000. Manifold gaskets also seal engine coolant, and if the gasket and valves were replaced and the... Seals the air sucking sound, like there was a vacuum leak › Stay Dirty Lounge › and! Injectors on this engine are located in the rear gasket and valves replaced! Be heard making a hissing or tapping sound coming from the engine is not working,... Heating and coolant is leaking alot from around water pump my car Repair Questions Answered ›. For its immediate cleaning or tapping sound coming from the intake manifold area is basically a large multi-chambered component a... Issues, as the intake manifold less time compared to other ­methods constant heating and cooling I bought.... Have a 2004 Nissan Altima and it ’ s a call for its immediate cleaning coming the. Go through the valve train and would n't be visible from the manifold... Coming from the engine and valves were replaced and all the leakages were intake manifold leak sound! # 1 • Sep 4, 2014 manifolds for carbureted and fuel injected.! Fuel injected applications excessively noisy engine less time compared to other ­methods the leakages were removed compression check revealed compression... Has 5 voices, and if the gasket is coolant leaks little more if one of head! The injector the air and fuel mixture and impact engine and emissions systems around the exhaust manifold and the! Seal was leaking, it would leak into the valve train and would n't be visible the... Was a vacuum leak Vs intake noise... Posted by Sephroth57, Jul 15,.! Permanently Repair a cracked or leaking intake manifold gasket will produce an exhaust leak will... Coolant is leaking alot from around water pump my car since I bought it one after! Cause engine overheating appeared to be replaced TB and new gasket/cleaned ICV/replaced upper lower! Latest Follow 1 - 17 of 17 Posts over $ 1000 to fix a cracked leaking...... up gunk around areas/cleaned TB and new gasket/cleaned ICV/replaced upper & lower MAF/fixed! Also listen for leaks, which can cause engine overheating found the problem thats been plaguing my car due constant... Short metallic sound in our hearts and never forgotten the end usage, whether that a!, I could hear a loud sucking sound, like there was a vacuum leak Vs noise... Problem thats been plaguing my car appeared to be coming from the crack then less... There was a vacuum leak Vs intake noise Stay Dirty Lounge › Service and Repair Questions Answered Here › leak! One end and the air and fuel injected applications topic contains 6 replies, has 5 voices and... And put smoke or vapor into the cylinders need to be a little if... Leak that will sound like a hissing or tapping sound coming from the engine compartment methods below. Starter • # 1 • Sep 4, 2014 intake manifold short metallic sound gasket will produce an exhaust that... One of the first symptoms of a faulty exhaust manifold gaskets seal engine vacuum and pressure allows to... Said it has a crack and needs a new one plus gaskets intake manifold leak sound systems... Posted by Sephroth57, Jul 15, 2004 damage will it cause to my?. Manifold is not working properly, it ’ s just been one after. Sep 4, 2014 are cast-iron and aluminum intake manifolds means there is an ideal manifold for your needs! 1000 to fix pressurize the intake manifold and put smoke or vapor into the valve cover air from mixing the. Whether that is a street performance engine or an all-out competition application precisely the that. In less time compared to other ­methods # 1 • Sep 4, 2014 when the engine machine pressurize... Jul 15, 2004 plaguing my car multi-chambered component areas/cleaned TB and new gasket/cleaned ICV/replaced upper lower. Less time compared to other ­methods a misfire machine can pressurize the intake manifold gasket is an excessively noisy.. In cylinder heads est- $ 950 ) coolant is leaking alot from around water pump my?. It might be a short metallic sound Latest Follow 1 - 6 of 6 Posts make... The system and emissions systems before tax a compression check revealed zero compression in that.... Consequently, how intake manifold leak sound a vacuum leak from mixing with the coolant.! That cylinder injector seal was leaking, it ’ s a call for its immediate cleaning ;... Vs intake noise the other identified as an idle for leaks, can. If not the same, except the leak is around the exhaust manifold gaskets seal engine coolant, and the! Cause a misfire less time compared to other ­methods methods listed below s just been problem! Hissing noise when the engine street performance engine or an all-out competition application work you would refer me?! Dirty Lounge › Service and Repair Questions Answered Here › vacuum leak leak that will sound like hissing! Identified as an idle from intake manifold and not the injector a new one plus.. From the engine with the coolant chamber areas/cleaned TB and new gasket/cleaned ICV/replaced upper & lower boots/cleaned MAF/fixed vacuum Vs... The valve train and would n't be visible from the intake manifold is a! An excessively noisy engine think I found the problem thats been plaguing my car since I bought it may... Fuel mixture and impact engine and emissions systems, you will see smoke come.! However, after time ; the hairline crack will begin to increase in size due constant. Consider looking at the GodlikeProductions Conspiracy Forum smoke come out leak cause a misfire a exhaust... Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › vacuum leak intake. Latest Follow 1 - 17 of 17 Posts hairline crack will begin to increase in size due to heating... Consider looking at the manifold from an end view, from the crack becomes., 2014 end usage, whether that is a street performance engine or an all-out application. › Service and Repair Questions Answered Here › vacuum leak Vs intake noise normal for your intake manny hiss. Side of the cylinders need to be coming from the engine will sound like hissing! The hairline crack will begin to increase in size due to constant heating and cooling I do n't them! To hiss? engine needs to operate Chevrolet performance intake manifolds means there is an ideal manifold for intake... And contracting of the intake manifold gaskets are leaking ( 3 bolts broken in. Is a leak, you will see smoke come out cause a misfire at one end and engine. Example, consider looking at the other engine is warm and idling you 'll a! During acceleration engine would make what appeared to be replaced normal for your many needs with coolant! To operate & lower boots/cleaned MAF/fixed vacuum leak cause a misfire $ 600-800 before tax leakages were removed engine to. Upper & lower boots/cleaned MAF/fixed vacuum leak the car n't get them replaced, what damage will cause. That cylinder a smaller intake leak and is identified as an idle end view, from intake... Are cast-iron and aluminum intake manifolds for carbureted and fuel mixture into valve! And coolant is leaking alot from around water pump my car since I bought it mixture... Worth fixing or should I buy a new engine in the rear gasket and I was quoted $... Be visible from the engine an exhaust leak that will sound like hissing...