99 xjr w/ newer sleeved engine
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99 xjr w/ newer sleeved engine
Engine has 77k on it new sleeved engine cars ran great! Other day I'm on the tollroad 90-100 mph
Get off drove at street speed for about 5 mi. at a stop light engine starts running rough then dies. Dealer says may be timing chain. When I start car it won't stay running for long (5 secs or so) and has loud rattle. I don't hear or feel rod knock.
Any ideas??
p.s. If the timing chain is broke does it stand to reason that the valves will be damaged therefor the rattles?
Get off drove at street speed for about 5 mi. at a stop light engine starts running rough then dies. Dealer says may be timing chain. When I start car it won't stay running for long (5 secs or so) and has loud rattle. I don't hear or feel rod knock.
Any ideas??
p.s. If the timing chain is broke does it stand to reason that the valves will be damaged therefor the rattles?
Joined: Jun 2007
Posts: 2,076
Likes: 40
From: Pompino Beach , FL
RE: 99 xjr w/ newer sleeved engine
yep sounds like a broken chain basically it's the seconday chain that breaks,.. which controls valve timing.. your basically getting no compression and no opening of intake and exhaust valves..
Joined: Jan 2008
Posts: 2,961
Likes: 89
From: 33498
RE: 99 xjr w/ newer sleeved engine
I just had one that blew a hole through top of cam cover. Unbolted cam and cylinder leakage test performed. Passed. Did all chains and tensioners and ran like new.
Will post pic of hole later.
Will post pic of hole later.
Joined: Mar 2008
Posts: 2,521
Likes: 71
From: Powell, Ohio U.S.A. 43065
RE: 99 xjr w/ newer sleeved engine
It's a funny thing about this failure... I've read of many others that didn't suffer valve damage. I have an AJ26 that bent a pair of A bank exhaust valves, and two AJ27's that both have destroyed B bank heads and pistons.
Joined: Jun 2007
Posts: 2,076
Likes: 40
From: Pompino Beach , FL
RE: 99 xjr w/ newer sleeved engine
the last aj27 i had only needed a single seconday chain nothing else.. but i still put a full set of new chains on.. must be when it brakes.. on start or WOT or shutting engine off
Joined: Mar 2008
Posts: 2,521
Likes: 71
From: Powell, Ohio U.S.A. 43065
RE: 99 xjr w/ newer sleeved engine
Every word of that is for sure. Have you sleeved any blocks? There's also an outfit in Minn. that sprays liners for NASCAR, I'd love to find out if anyone has experience with that route.
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Joined: Jun 2007
Posts: 2,076
Likes: 40
From: Pompino Beach , FL
RE: 99 xjr w/ newer sleeved engine
no we just install new if there nikasil ones.. there is a company in michigan that re sleeves the jag block and they give full warranty.. 1-2 years..
nascar .. wud be cool to see them do that
nascar .. wud be cool to see them do that
Joined: Mar 2008
Posts: 2,521
Likes: 71
From: Powell, Ohio U.S.A. 43065
RE: 99 xjr w/ newer sleeved engine
Yep genius, I think I'm going to send them one. They're quoting $1500 total to do a block. I don't know what AutoSports gets to do sleeves, butthe machine shop I usewould have trouble doing it for less than that.
Nice to finally find a forum that has some pros on board!
Nice to finally find a forum that has some pros on board!
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