Header leak or lifter , tappet

[7DCUDA383A]

This sound is back , just had my distributor crap out on me , luckily it wasn't my chain . IT sounds like a header leak and it sounds like lifter or tapped type issue.

 

[Ronbo73]

Hard to really tell in the video but if it is a header leak, you should see some black from the area of the leak. Maybe a leak at the collector gasket?
Did you try the long screwdriver to the ear trick to try and pin point the sound or an automotive stethoscope?

 

[MOPARMITCH]

Sounds like header leak....

 

[7DCUDA383A]

Hard to really tell in the video but if it is a header leak, you should see some black from the area of the leak. Maybe a leak at the collector gasket?
Did you try the long screwdriver to the ear trick to try and pin point the sound or an automotive stethoscope?

I'm a change oil and brake pads mechanic , I have learned a lot working on this car but the technical stuff still floats by the brain cells I have left , I just did order a stethoscope that will be here tomorrow and I also ordered Remflex header gaskets and collector gaskets , the car came with studs for headers , all nuts seem tight but something could of been loose to cause a leak.

 

[7DCUDA383A]

Sounds like header leak....

That's what most people say but a couple said lifter , tappet or rod , I haven't been working on this car long enough to know all the ins and outs , new to the old Mopar stuff but learning .

 

[540HemiCuda]

Take a length of vacuum hose, wrap some malleable wire around is so that you can shape it as you want. Put one end to your ear as you put the other end around the flange with the engine idling. When you get to a leak, you will sure know it.

The wire needs to be a little tight on the hose to retain the shape that you want, but the loops only need to be every inch or two and as small a wire as will hold the shape you want.

Always works for me.

 

[Mopar Nut]

When I had headers on my car before I throw them away, I had a header leak that I noticed at night. You can see the flames popping out against the head and the flange.

 

[Xcudame]

Definitely sounds like an exhaust leak because it tends to go away when you revved the engine. A lifter or rod bearing would just get faster. At night, you should be able to see flames like @Mopar Nut mentioned if you can get at the right angle - might have to crawl under the car. And the only way I'd crawl under a running car is on a lift or jack stands so all four wheels are off the ground.
Stethoscope should pin point the leak for you.

 

[Mopar Nut]

 

[7DCUDA383A]

Definitely sounds like an exhaust leak because it tends to go away when you revved the engine. A lifter or rod bearing would just get faster. At night, you should be able to see flames like @Mopar Nut mentioned if you can get at the right angle - might have to crawl under the car. And the only way I'd crawl under a running car is on a lift or jack stands so all four wheels are off the ground.
Stethoscope should pin point the leak for you.

I hope it is , some people on another group said lifter etc. but most people said header leak , I'm putting on Remflex gaskets and take my time with it .

 

[7DCUDA383A]

View attachment 156197

Im feeling that now .

 

[Challenger RTA]

Forth of July special. There is a way to find a small Natural gas leak. Use a match. Same for a vacuum leak on a motor use an accelerant. Gas or other. Find if it's exhaust leak. Use a torch to see if the flame is blown out. Or use an object to see the exhaust leak. Hint don't use you finger cardboard or other. Should be able to see fire in the hole.

 

[7DCUDA383A]

Forth of July special. There is a way to find a small Natural gas leak. Use a match. Same for a vacuum leak on a motor use an accelerant. Gas or other. Find if it's exhaust leak. Use a torch to see if the flame is blown out. Or use an object to see the exhaust leak. Hint don't use you finger cardboard or other.

I just ordered a stethoscope so maybe will help , the thing is when I put the new headers on it made that noise but went away then the other day I was going down the highway and it made a pop sound then backfired and of course stopped the car and wouldn't fire up , probably the timing chain but when I checked the distributor the rotor spun freely, I replaced that and all was good but that tapping noise again , seems louder but not loud when the rpms are up

 

[pschlosser]

I hope it is , some people on another group said lifter etc. but most people said header leak , I'm putting on Remflex gaskets and take my time with it .

You may want to verify the issue is indeed a header exhaust leak, before you go to the trouble to replace the gaskets.

Just like post #7, flames are often visible with a header exhaust leak at the cylinder heads. At night, warm up the car, so it idles nice, turn off the lights, pop the hood, and rev the engine up a few times looking for those flames as the cylinder heads.

Headers leaking at the cylinder heads is a common problem with headers. I think it's because unlike cast exhaust manifolds, the flange tweaks and bends in time, through numerous heating and cooling cycles, and can effect the gasket's ability to seal.

 

[Mopar Nut]

Im feeling that now .

Headers fit so much better now, it happened to me back in the 70s, this was on a GM car.

 

[7DCUDA383A]

You may want to verify the issue is indeed a header exhaust leak, before you go to the trouble to replace the gaskets.

Just like post #7, flames are often visible with a header exhaust leak at the cylinder heads. At night, warm up the car, so it idles nice, turn off the lights, pop the hood, and rev the engine up a few times looking for those flames as the cylinder heads.

Headers leaking at the cylinder heads is a common problem with headers. I think it's because unlike cast exhaust manifolds, the flange tweaks and bends in time, through numerous heating and cooling cycles, and can effect the gasket's ability to seal.

It's hard to believe this sound is an exhaust leak , I don't care about changing gaskets .