98 RR 4.0 enginge woes.
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Drifting
Joined: Jan 2012
Posts: 29
Likes: 0
98 RR 4.0 enginge woes.
Here's a quick rundown of whats going on...
208,000 miles.. always ran great my father bought it new, babied. It has never been apart, never been overheated. It started leaking oil pretty bad from the valley, I put it off for a few thou miles always kept an eye on level. In the last 1k miles it started ticking, not too bad, but ticking. So i recently bit the bullet and changed out my valley pan, front cover gasket, oil press sender etc... when I had it apart I took a whole day to really clean the motor while I had the oil pan off etc.. it looked like it had 3lbs of coffee dumped in (carbon sludge and buildup..) I put it back together new timing chain kit plugs everything.. started great! Ran better than I can remember, lifters pumped up smooth idle awesome!!! Except... when it finally gets to temp the oil pressure light comes on sometimes, when I raise the revs it goes away but doesn;t readily come right back on, but it will eventually. A few minutes of this then it starts ticking again, ticking goes away after 1500 rpm runs strong throttle response is sharp.. what could be going on??
Wrist pins?
Liner issue?
Did I mix up my rockers left to right?
Here's a sound clip.
208,000 miles.. always ran great my father bought it new, babied. It has never been apart, never been overheated. It started leaking oil pretty bad from the valley, I put it off for a few thou miles always kept an eye on level. In the last 1k miles it started ticking, not too bad, but ticking. So i recently bit the bullet and changed out my valley pan, front cover gasket, oil press sender etc... when I had it apart I took a whole day to really clean the motor while I had the oil pan off etc.. it looked like it had 3lbs of coffee dumped in (carbon sludge and buildup..) I put it back together new timing chain kit plugs everything.. started great! Ran better than I can remember, lifters pumped up smooth idle awesome!!! Except... when it finally gets to temp the oil pressure light comes on sometimes, when I raise the revs it goes away but doesn;t readily come right back on, but it will eventually. A few minutes of this then it starts ticking again, ticking goes away after 1500 rpm runs strong throttle response is sharp.. what could be going on??
Wrist pins?
Liner issue?
Did I mix up my rockers left to right?
Here's a sound clip.
Pro Wrench
Joined: Feb 2008
Posts: 1,706
Likes: 3
From: Meridian, Idaho
Could be your oil pump. Get a pressure gauge on it and see what it says. It sounds like many other RRs I've looked at. I went to auction the other day and looked at a 98 with only 128k miles, it sounded just like that. My Jag started giving me low oil pressure warnings, you probably already did this, but cleaning the sump catch screen really helped it out.
Last edited by LRScott; Jan 8, 2012 at 01:30 PM.
Thread Starter
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Drifting
Joined: Jan 2012
Posts: 29
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Sorry, new lifters, and updated rocker arms too. I did disassemble the oil pump to clean and remember a ton of wear, should have replaced it. Easy to rebuild and get at. Next project. I'll report on my findings. I am ordering a kit today.
Super Moderator
Joined: Jan 2011
Posts: 16,322
Likes: 88
From: Savannah Georgia
May find this, and an oil psi test would also point to it. Cracks make the tick, and cracks let psi be enough to turn out light - for a while, but not enough PSI for proper operation.
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