Exhaust leak? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nicktheknife · 11-30-2007, 06:29 PM

When my engine is running, there is a kind of popping/clicking sound that gets more rapid as the rpm's go up, exhaust leak? Valves out of adjustment?

corn · 11-30-2007, 08:31 PM

Could be either one. Do you have an automotive stethoscope?

http://www2.northerntool.com/product-1/385487.htm

nicktheknife · 12-01-2007, 10:21 AM

Nah, but I could get one, what would I be looking for when I get it?

Slammed70 · 12-01-2007, 10:27 AM

Lifters will create a metallic clicking noise. Header leak will be a uniform popping noise that always sounds trhe same.

60ratrod · 12-01-2007, 11:34 AM

for exhaust leaks, i would use a piece of vac hose and listen around your manifolds. a stethoscope can be picked up at your local parts store real cheaply. valves when driving would sound more like a click and slight knocks where exhaust sounds like popping sounds. you also may be able to feel hot air. i would check your exhaust doughnuts

EAST SIDE LOW LIFE · 12-01-2007, 01:49 PM

Chunk of hose works every time and you probably have a 5/8 chunk about 3 ft long collecting dust. If not buy a chunk as you will get two uses from it as you will need some for a PCV valve, pwr. brake vac. hose line etc. one day. Header leaks sound like a steady ticking sound different then valves. If your not sure go by a garage [ma & pa type] as any mechanic can tell you if it's a header leak or valve train noise that you are hearing.

If it's a header leak I use Permatec Ultre Copper .... cheaper then gaskets and works great.

esll.

nicktheknife · 12-01-2007, 03:18 PM

thanks alot guys

OrangeCrush1970 · 12-01-2007, 03:47 PM

Check your manifolds. I just went thru a set of crummy gaskets on my headers and had the same sound. If I can give my $.02, spend a few extra bucks on good gaskets...you'll be happier in the long run.

Ole Blue 68 · 12-01-2007, 05:04 PM

Depending on the material, you can also double up on the gaskets as well. But I would agree with OrangeCrush, go with good gaskets and fasteners.

chris71 · 12-05-2007, 11:28 AM

ive got an exhaust leak in my chevelle right now, its killing me, a leak will increase with rpms, but will go away or decrease when your foot is off the pedal. look for the notorious black soot around your header/manifold gaskets or collectors/donuts. the PO used the cheap paper gaskets and they always blow sooner or later, i want to step up to the copper gaskets with the locking fasteners soon, saves headaches like these down the road. good luck

11-30-2007, 06:29 PM	#1
nicktheknife Registered User Join Date: Sep 2007 Location: Marysville, CA Posts: 23	Exhaust leak? When my engine is running, there is a kind of popping/clicking sound that gets more rapid as the rpm's go up, exhaust leak? Valves out of adjustment?

11-30-2007, 08:31 PM	#2
corn Registered User Join Date: Dec 2003 Location: here Posts: 5,789	Re: Exhaust leak? Could be either one. Do you have an automotive stethoscope? http://www2.northerntool.com/product-1/385487.htm

12-01-2007, 10:21 AM	#3
nicktheknife Registered User Join Date: Sep 2007 Location: Marysville, CA Posts: 23	Re: Exhaust leak? Nah, but I could get one, what would I be looking for when I get it?

12-01-2007, 11:34 AM	#5
60ratrod yes, i do Join Date: Jun 2007 Location: Spokane, wa Posts: 2,734	Re: Exhaust leak? for exhaust leaks, i would use a piece of vac hose and listen around your manifolds. a stethoscope can be picked up at your local parts store real cheaply. valves when driving would sound more like a click and slight knocks where exhaust sounds like popping sounds. you also may be able to feel hot air. i would check your exhaust doughnuts __________________ ERROR 404....... SNAPPY COMEBACK NOT FOUND _______________________________________________________________________________________________ -60 Chevy C10, dead 350/good th350 combo, sitting on a 76 c10 blazer frame, built from 11 different vehicles "the abomination" -07 gmt900 silverado 1500 lt xcab z71, granite blue -81 suzuki gs650g "shelah"- current project -81 kz1000m1 csr "sarge" -next project (just beautification) -07 kawasaki vulcan classic vn900

12-01-2007, 01:49 PM	#6
EAST SIDE LOW LIFE Senior Member Join Date: Mar 2007 Location: VANCOUVER ISLAND, B.C., Canada Posts: 1,602	Re: Exhaust leak? Chunk of hose works every time and you probably have a 5/8 chunk about 3 ft long collecting dust. If not buy a chunk as you will get two uses from it as you will need some for a PCV valve, pwr. brake vac. hose line etc. one day. Header leaks sound like a steady ticking sound different then valves. If your not sure go by a garage [ma & pa type] as any mechanic can tell you if it's a header leak or valve train noise that you are hearing. If it's a header leak I use Permatec Ultre Copper .... cheaper then gaskets and works great. esll. Attached Images __________________ Tomorrow is for doing today's stuff. ************************************* This truck has just the right amount of energy for me! Author: Warren Lake .... (member) Last edited by EAST SIDE LOW LIFE; 12-01-2007 at 01:55 PM.

12-01-2007, 03:18 PM	#7
nicktheknife Registered User Join Date: Sep 2007 Location: Marysville, CA Posts: 23	Re: Exhaust leak? thanks alot guys

12-01-2007, 03:47 PM	#8
OrangeCrush1970 Registered User Join Date: Jun 2007 Location: Smyrna, GA Posts: 709	Re: Exhaust leak? Check your manifolds. I just went thru a set of crummy gaskets on my headers and had the same sound. If I can give my $.02, spend a few extra bucks on good gaskets...you'll be happier in the long run. __________________ *Rottenwood Garage* 1970...71...72 C1500 aka Orange aka Sideshow Bob 540 BB Straub Roller Cam, AFR Magnums, XP 950, TKO 600 2 Tons of Fun

12-01-2007, 05:04 PM	#9
Ole Blue 68 Registered User Join Date: Aug 2005 Location: Philly Posts: 1,140	Re: Exhaust leak? Depending on the material, you can also double up on the gaskets as well. But I would agree with OrangeCrush, go with good gaskets and fasteners.

12-05-2007, 11:28 AM	#10
chris71 Registered User Join Date: Oct 2007 Location: Sykesville MD Posts: 357	Re: Exhaust leak? ive got an exhaust leak in my chevelle right now, its killing me, a leak will increase with rpms, but will go away or decrease when your foot is off the pedal. look for the notorious black soot around your header/manifold gaskets or collectors/donuts. the PO used the cheap paper gaskets and they always blow sooner or later, i want to step up to the copper gaskets with the locking fasteners soon, saves headaches like these down the road. good luck __________________ '55 3100 2nd series short-bed stepside '70 Corvette coupe stingray '71 Chevelle 2-dr coupe SS clone '71 C10 long-bed fleetside '83 long-haired brunette wife

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