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karstic
August 23rd, 2005, 11:16
My exhaust manifold has a crack in it and has cause the nylon fuel return line to melt and spring a leak. This happened on a trip towing a tent trailer through desert heat. The motor was working pretty hard and when we stopped I noticed a fuel smell. There was a puddle of gas collecting under the Jeep. Needless to say I grabbed the fire extinguisher and shut down the Jeep. It seems that when I let the Jeep sit at an idle, the nylon line heated up from the escaping exhaust gases and the now pressurized return fuel line sprung a pinhole leak.

I replaced the fuel line but still have the cracked manifold. It’s just a matter of time before the right conditions occur and it will happen again. Ultimately I either have to replace or fix the header.

As a temp fix I was thinking of wrapping the exhaust header with the exhaust tape like they have at Summit Racing. Anyone foresee a problem with this? Like I said this is just temporary until I can deal with the header.

Avanteone
August 23rd, 2005, 11:39
It MIGHT get you by enough to get home. Fix the manifold by installing a new one, don't put it off. Otherwise, make sure your insurance is paid up because you're gonna have a big fireball on your hands shortly.

John

badge714
August 23rd, 2005, 11:46
get yourself a tube of JB WELD ,PRESS IT DOWN INTO CRACK. if you ewt your finger while working it down you can get it sealed good badge714

langer1
August 23rd, 2005, 11:46
The leak will just blow a hole in the tape, move the line out of harms way for now.

RichP
August 23rd, 2005, 11:53
Get it welded, that will last alot longer than tape, jbweld or any other temp fix. Usually will cost about $20 cash and take a minute or two depending on whether the welder can get at the crack w/o removing the manifold. The 4.0L is not the only one that has cracked header problems, just about everyone else who uses tube type exhaust manifolds has this problem too..

langer1
August 23rd, 2005, 12:16
Send this guy a email and get a new one

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1,1&item=7990447815&sspagename=STRK%3AMEWA%3AIT

mhead
August 23rd, 2005, 13:13
Mine had a crack where the tubes are collected. Bought one from the guy on ebay. Fit on just fine. It's been something like a year and I've had no further problems. It's stainless as well. I think the expansion joints reduce the stress that causes the cracks. It is difficult to weld the header in place and it takes a while to get it off. If you weld you may end up welding again and again.

markaboo929
August 23rd, 2005, 13:15
CHECK ON E BAY I JUST GOT A BRAND NEW ONE FOR $50 + $29 SHIPPING . :laugh3: