How to tell if there is an exhaust leak

goblue9976 · 07-12-2006, 04:26 PM

My friend said that he thought that my Blazer might have an exhaust leak...He claims that it sounds like it does. Might sound dumb, but I have no clue what hes talking about.
Anyone care to enlighten me on this?

DeMon76187 · 07-12-2006, 04:27 PM

describe the sound of your exhaust when the negine reves.

ig u hear a rattle, vipration, or whistle, u might have somethign to fix

Eight433 · 07-12-2006, 04:28 PM

if you cant hear it, i wouldent worry about it

goblue9976 · 07-12-2006, 04:30 PM

its sora hard to explain...it does seem to make a bit of a odd noise when I rev it. Im not sure if its normal or not, so Ill go try to get a clip of it.

BTW: Damn that was some fast replys!

Eight433 · 07-12-2006, 04:34 PM

if its a puff puff puff or pop pop pop noise that changes according to engine speed, you probly have an exaust leak. i'll guess right now that its the flexpipe. they like to go bad.

Eight433 · 07-12-2006, 04:34 PM

if its a puff puff puff or pop pop pop noise that changes according to engine speed, you probly have an exaust leak. i'll guess right now that its the flexpipe. they like to go bad.

Eight433 · 07-12-2006, 04:35 PM

ummmm.... i dont know how that happened. i only pushed post once....

thats gotta be a record for highest "double" post, lol.

goblue9976 · 07-12-2006, 04:41 PM

haha...of course, I go to attempt to take a sound clip, and my camara decides to not record sound. It took the video fine, but no sound. It sorta sounds like that "pop pop pop" noise...but then again, it sounds more like a ticking noise. Its also way more noticible when I quickly rev it, not as much while maintaining a constant RPM

goblue9976 · 07-12-2006, 06:53 PM

I managed to get a clip, but you couldnt make out anything since I was sitting inside pushin the gas...

Eight433 · 07-12-2006, 07:12 PM

probly the flexpipe. 80 percent sure.

goblue9976 · 07-12-2006, 08:17 PM

Wierd...it only has 29,000 on it. It was my grandpa's truck, but it wasnt drivin in the past 4 years EXEPT for my uncle using it to tow a jetski, so its hardly been drivin. So should I have the flexpipe checked out? Would I be able to tell if it was messed up just by looking at it?

Eight433 · 07-12-2006, 08:29 PM

if you take it to an exaust shop, they should be able to tell you (for free) if and where the exaust leak is. or, climb under it and wiggle the downpipe. you should be able to see whats going on.

they are expensive sometimes though. Mine is leaky, but i just live with it.

edit: I dont know the set-up on a 4.3.. dident realize this was in the blazer/jimmy/bravada section (linked from new post page, lol)

the 2.2's are known for the flexpipe due to the shaking/movement of the 4 cyl. not sure if the 4.3's even have a flexpipe set up. I would just climb under there when its running (but still cold) and feel around for air excaping at any joints/welds/ etc.

goblue9976 · 07-12-2006, 10:48 PM

haha...now that I think about it, it was probably in the wrong forum...

p07r0457 · 07-13-2006, 04:14 AM

The 4.3L doesn't have a flexpipe. A y-pie bolts directly to the manifolds, and the two ends meet on the passenger side where it's bolted to the cat, and another flange meets the muffler to the welded tailpipe -- no flexpipe!

Can you identify about where the leak is occuring? Exhuast manifold? Or busted gasket between some of the flanges?

I had the flange between the cat and muffler leak... Replaced the gasket and new bolts and it was good to go.

goblue9976 · 07-14-2006, 11:32 PM

nah, I havent been able to check it. It doesnt smell any different than my other cars have, so im not sure if it is leaking then...

07-12-2006, 04:26 PM	#1
goblue9976 Registered User Age: 28 Join Date: Jan 2006 Posts: 77 Location: User is: OffLine	How to tell if there is an exhaust leak My friend said that he thought that my Blazer might have an exhaust leak...He claims that it sounds like it does. Might sound dumb, but I have no clue what hes talking about. Anyone care to enlighten me on this?
	[Reply w/Quote]

07-12-2006, 04:27 PM	#2
DeMon76187 Mecha-Shiva Age: 22 Join Date: Sep 2005 Posts: 1,260 Location: Palm Harbor, FL User is: OffLine	Re: How to tell if there is an exhaust leak describe the sound of your exhaust when the negine reves. ig u hear a rattle, vipration, or whistle, u might have somethign to fix
	[Reply w/Quote]

07-12-2006, 04:28 PM	#3
Eight433 Rollin` Proud on 15's Age: 25 Join Date: Oct 2004 Posts: 3,017 Location: Birch Run, Michigan User is: OffLine	Re: How to tell if there is an exhaust leak if you cant hear it, i wouldent worry about it
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07-12-2006, 04:30 PM	#4
goblue9976 Registered User Age: 28 Join Date: Jan 2006 Posts: 77 Location: User is: OffLine	Re: How to tell if there is an exhaust leak its sora hard to explain...it does seem to make a bit of a odd noise when I rev it. Im not sure if its normal or not, so Ill go try to get a clip of it. BTW: Damn that was some fast replys!
	[Reply w/Quote]

07-12-2006, 04:34 PM	#5
Eight433 Rollin` Proud on 15's Age: 25 Join Date: Oct 2004 Posts: 3,017 Location: Birch Run, Michigan User is: OffLine	Re: How to tell if there is an exhaust leak if its a puff puff puff or pop pop pop noise that changes according to engine speed, you probly have an exaust leak. i'll guess right now that its the flexpipe. they like to go bad.
	[Reply w/Quote]

07-12-2006, 04:35 PM	#7
Eight433 Rollin` Proud on 15's Age: 25 Join Date: Oct 2004 Posts: 3,017 Location: Birch Run, Michigan User is: OffLine	Re: How to tell if there is an exhaust leak ummmm.... i dont know how that happened. i only pushed post once.... thats gotta be a record for highest "double" post, lol.
	[Reply w/Quote]

07-12-2006, 04:41 PM	#8
goblue9976 Registered User Age: 28 Join Date: Jan 2006 Posts: 77 Location: User is: OffLine	Re: How to tell if there is an exhaust leak haha...of course, I go to attempt to take a sound clip, and my camara decides to not record sound. It took the video fine, but no sound. It sorta sounds like that "pop pop pop" noise...but then again, it sounds more like a ticking noise. Its also way more noticible when I quickly rev it, not as much while maintaining a constant RPM
	[Reply w/Quote]

07-12-2006, 06:53 PM	#9
goblue9976 Registered User Age: 28 Join Date: Jan 2006 Posts: 77 Location: User is: OffLine	Re: How to tell if there is an exhaust leak I managed to get a clip, but you couldnt make out anything since I was sitting inside pushin the gas...
	[Reply w/Quote]

07-12-2006, 07:12 PM	#10
Eight433 Rollin` Proud on 15's Age: 25 Join Date: Oct 2004 Posts: 3,017 Location: Birch Run, Michigan User is: OffLine	Re: How to tell if there is an exhaust leak probly the flexpipe. 80 percent sure.
	[Reply w/Quote]

07-12-2006, 08:17 PM	#11
goblue9976 Registered User Age: 28 Join Date: Jan 2006 Posts: 77 Location: User is: OffLine	Re: How to tell if there is an exhaust leak Wierd...it only has 29,000 on it. It was my grandpa's truck, but it wasnt drivin in the past 4 years EXEPT for my uncle using it to tow a jetski, so its hardly been drivin. So should I have the flexpipe checked out? Would I be able to tell if it was messed up just by looking at it?
	[Reply w/Quote]

07-12-2006, 08:29 PM	#12
Eight433 Rollin` Proud on 15's Age: 25 Join Date: Oct 2004 Posts: 3,017 Location: Birch Run, Michigan User is: OffLine	Re: How to tell if there is an exhaust leak if you take it to an exaust shop, they should be able to tell you (for free) if and where the exaust leak is. or, climb under it and wiggle the downpipe. you should be able to see whats going on. they are expensive sometimes though. Mine is leaky, but i just live with it. edit: I dont know the set-up on a 4.3.. dident realize this was in the blazer/jimmy/bravada section (linked from new post page, lol) the 2.2's are known for the flexpipe due to the shaking/movement of the 4 cyl. not sure if the 4.3's even have a flexpipe set up. I would just climb under there when its running (but still cold) and feel around for air excaping at any joints/welds/ etc.
	[Reply w/Quote]

07-12-2006, 10:48 PM	#13
goblue9976 Registered User Age: 28 Join Date: Jan 2006 Posts: 77 Location: User is: OffLine	Re: How to tell if there is an exhaust leak haha...now that I think about it, it was probably in the wrong forum...
	[Reply w/Quote]

07-13-2006, 04:14 AM	#14
p07r0457 Registered User Age: 24 Join Date: Mar 2005 Posts: 497 Location: User is: OffLine	Re: How to tell if there is an exhaust leak The 4.3L doesn't have a flexpipe. A y-pie bolts directly to the manifolds, and the two ends meet on the passenger side where it's bolted to the cat, and another flange meets the muffler to the welded tailpipe -- no flexpipe! Can you identify about where the leak is occuring? Exhuast manifold? Or busted gasket between some of the flanges? I had the flange between the cat and muffler leak... Replaced the gasket and new bolts and it was good to go.
	[Reply w/Quote]

07-14-2006, 11:32 PM	#15
goblue9976 Registered User Age: 28 Join Date: Jan 2006 Posts: 77 Location: User is: OffLine	Re: How to tell if there is an exhaust leak nah, I havent been able to check it. It doesnt smell any different than my other cars have, so im not sure if it is leaking then...
	[Reply w/Quote]