Exhaust stink in cockpit

[PAUL161]

Suggestion. Go to a muffler shop and get a tube of the pipe seal they dab on the tail pipe joints. You can work it in with your fingers and the stuff when hot almost turns to stone. Might work well in your situation and doesn't cost much. PJ

 

[jlaird]

Can get the same stuff in a tube from your friendly auto parts store.

 

[DrEntropy]

And if ya wanna keep yer LBC all English, THIS stuff is proper. :wink:

 

[bigjones]

Thanks for the suggestions.
I'll pick some up - there is still a whiff of exhaust gas - especially with the window quarterlight open.
Hey Doc, do you really live in Denmark?

 

[DrEntropy]

Hamlet's Denmark. Between me ears. :laugh:

I'm south of you, south of Jack, too.

 

[jlaird]

Doc is south and going fast. LOL

 

[DrEntropy]

"Half-fast an' flyin' low..." :laugh:

 

[bigjones]

Necessity is the mother...It works, just drive fast.

Ha! I've just got the joke. Is that to stay clear of the screws when they fall out? Ha!

Now I've finally got the car running again, there is still a stink of exhaust in the cockpit. The connection between the long pipe and the muffler is now sealed up - thanks Paul and Jack for the suggestions - that silicate stuff works a treat. I'm thinking the leak must be coming from the donut between the down-pipe and the long pipe (I re-used the old one). Before I tear it down again can I just rule out another possibility - that the exhaust tip does not extend far enough out from the rear bumper. What do you think?

 

[SilentUnicorn]

The tip should not stick out past the bumper. You need to keep it out of the swirling air behind the car, and get it into the air flowing under the car.

 

[bigjones]

Wow! Thanks for the education.

That is good news - I'll just go ahead and lower it to match that in the ad.

Cheers!

 

[bgbassplyr]

Check for unsealed holes/openings in the firewall that will let stink in. Even small openings, like deteriorated rubber seals around cables can be the problem.

 

[bigjones]

Will do - thanks for the tip - might even cut down on the heat come summer.

 

[bigjones]

OK, I've lowered the muffler even more, replaced the do-nut gasket with a new one, used exhaust putty (followed by a tight wrap of exhaust bandage) on the connections, plugged up holes in the bulkhead and I'm still getting gassed.

I checked the manifold nuts (the ones on top) and I could tighten by a flat or two. Is it worthwhile taking off the carb etc to tighten up the lower manifold nuts, ie could it be a exhaust leak through the manifold gasket?

I checked the exhaust sytem for splits and, with the aid of a mirror, checked out most of the exhaust manifold for cracks but all appears well.

Any thoughts appreciated.

Cheers

 

[JPSmit]

one thought might be to drive with the top up - not being silly here - you might be able to determine if the smell is coming from in front of you or behind you by disrupting the wind swirling.

 

[bigjones]

Good one, JP. It supposed to rain tomorrow so I'll give it a shot.
Thanks.

 

[Billm]

How I check for exhaust leaks is to stuff a rag into the tip, if it kills the engine pretty quickly then you have no holes but if the engine keeps running then feel around the pipes for the exhaust leaks
BillM

 

[Guest]

The tip should not stick out past the bumper. You need to keep it out of the swirling air behind the car, and get it into the air flowing under the car.

Yeah, and get the chic inside the car and keep the idiot from flying over it; it spooks the chic.

 

[DrEntropy]

Now that you have a well sealed system, revisit the first suggestion I posted.

I suspect the connection 'twixt the header and downpipe meself.

 

[bigjones]

Bill,
Thanks for the idea - might try that or wait til my tennis buddy comes over and get him to still his feet on the pipes, as Doc suggests.
Doc,
No more kippers??

 

[JPSmit]

Doc,
No more kippers??

maybe he was trying to wear them.