Hey Guys,

I taped my down pipe a couple times since getting my car dropped some more, and I now hear a hissing coming from the rear end of the car (like right behind the passenger seat under the car).

I jacked the car up today and started the car and I see a decent amount of condensation coming out of the tail pipes, and a good amount of fluid (water) dripping from the connections from the downpipe back.

Anything to be worried about? And is that probably the source of my exhaust leak?

When I get some free time I was going to go back under the car and re-tighten the rear connections of the exhaust.

Any advise is appreciated.

Thanks

T

 

Condensation is perfectly normal. Water is a product of hydrocarbon combustion.

As for your new leaks... that depends on how large they are. If you can hear them, its probably too much. Do what you can to seal them up.

High temp silicone glue actually works quite well for sealing exhaust flanges interfaces and inside slip fit joints. Silicone does surprisingly well despite exposure to the high temperatures.

 

^^^ Thanks for the reply. The leaks are more like steady drips. I was going to take off the rear of the exhaust and go through and use some High Temp RTV and re-tighten and re-seal everything.

Thanks

T

 

I learned about high temp silicone, great cause I have a slight exhaust leak also

 

+1, you can also try just replacing the gaskets and re tightening everything down real well.

 

Condensation normal. If it's under the passenger, that's close to the pipe to cat junction. Check to see that you have not blown out the exhaust junction gasket, the ones near the cat get very hot. I've found esp metallic-carbon sandwich gaskets, if the joint gets loose, lets the hot exhaust into the middle of the gasket "sandwich", blows out part of it, makes exactly a "hissing" noise.

If after you tighten it up it's not gone, take apart the pipes at the junction, you may have fried your pipe gasket (cheap to fix at least) or it may be out of place, missing some material, etc.

I've replaced my headers, cats, exhausts etc. on my 3 Nissans myself, and the only time I had this problem was the metal-carbon-metal-gasket looked ok but when I removed it, you could see the streak where exhaust had burned a small path through the gasket. I replaced it with a low-tech typical OEM gasket, it works fine.

No more snakes under the car

HTH

 

ya its a hissing sound under load. Looks like I'm replacing gaskets this weekend.

Thanks Steve

T