From what Ive heard the valve doesnt hit the piston but Im not saying it didnt happen on his engine.
04 kj will have a 7yr/70 powertrain warranty unless it was bought used and not transfered over. 60k is pretty sad.
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| 0 compression in # 3 cylinder. Uh, Oh. http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=1&t=32448 |
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| Author: | nursecosmo [ Mon May 12, 2008 7:59 pm ] |
| Post subject: | 0 compression in # 3 cylinder. Uh, Oh. |
My brother's 04 kj 3.7L started missing a little bit on cold starts a couple of months ago but would smooth out after a couple blocks of driving. It would throw a CEL and the scanner would just say misfire in #3 cylinder. last week he was driving and the engine made a terrible clanging sound and lots of smoke. He was able to limp home but just barely. He checked the compression and # 3 has zero compression. has anyone on the forum ever thrown a valve in their 3.7L? |
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| Author: | Guest [ Mon May 12, 2008 8:08 pm ] |
| Post subject: | |
I've heard of a few 3.7s and 4.7s doing it. How many miles are on it? |
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| Author: | jeepskate [ Mon May 12, 2008 8:24 pm ] |
| Post subject: | |
I had a broken valve spring on my 3.7 somewhere between 100,000 and 110,000 miles. Had all the valves and springs replaced then. Wasn't cheap but now I have 160,000 and running strong. |
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| Author: | nursecosmo [ Mon May 12, 2008 9:09 pm ] |
| Post subject: | |
ThunderbirdJunkie wrote: I've heard of a few 3.7s and 4.7s doing it. How many miles are on it?
63K, can you believe that. Do these engines break the valve if this happens or just bend them? |
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| Author: | Jeepjeepster [ Mon May 12, 2008 9:52 pm ] |
| Post subject: | |
From what Ive heard the valve doesnt hit the piston but Im not saying it didnt happen on his engine. 04 kj will have a 7yr/70 powertrain warranty unless it was bought used and not transfered over. 60k is pretty sad.
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| Author: | nursecosmo [ Mon May 12, 2008 10:12 pm ] |
| Post subject: | |
Yep he bought it used. |
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| Author: | Guest [ Mon May 12, 2008 11:42 pm ] |
| Post subject: | |
nurse...i'd agree about the broken valve spring. If he's able to check his own compression, he should be able to change his own valve springs...parts are cheap, labor isn't! |
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| Author: | David Jr [ Tue May 13, 2008 8:26 pm ] |
| Post subject: | |
Wow, changing valve springs, what loads of fun   .
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| Author: | myjeepwalks [ Wed May 14, 2008 8:43 pm ] |
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106k on my 02' still runs real strong. I hope my springs don't break any time soon. Not looking forward to that! |
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