Thread: Not noisy lifters, then what?

a mate of mine had a d1 3.9 that did the same he had the engine rebuilt and the guy who did it said it was the cam moving backwards and forwards he said rover had a fix for it
it was the bolt that held the cam gear to the cam simply had a rubber block on it so when the cam moved forwards the rubber block on the bolt would contact with the timing cover instead of the bolt touching the cover

The later 4.0 and 4.6 have a different cam retention method to 3.9s. they have a collar to stop the cam moving forward so it cannot be that(unless it has come loose.)

I think I have suggested before that you may not have enough lifter preload.
Did the mechanic check??? Should be 20-50 thou between the circlip in the lifter and the pushrod socket.
Very few people check it.
Regards Philip A

a trick to quietening noisy lifters is to add about half a litre of auto transmission fluid to the engine oil.......

try this first.....it wont hurt anything to try......

I think I have suggested before that you may not have enough lifter preload.
Did the mechanic check???

Yes I remember now that you suggested it, but I got to the point where I just didn't have the time to stumble though the job myself, and called in the experts.

I don't know if the mechanic checked, but now you've reminded me, I will be asking them...now, this is a preload you check with new lifters?

I should've just left it the way it was... with Bars Stop Leak the gasket leak was doing just fine and lifter noise I could call 'character', especially if it saved me $2500...

I know i haven't done many posts before but for the last year my disco1 has been doing my head in with a lifter noise 1 fix replaced lifters didn't work 2 fix pulled motor out put another set of lifters and new cam and found liners were moving in the block so called expert told me to pin them still did not fix the problem 3 fix pulled motor out again got told be kevin at rover tech to put new liners in the block did so and the noise is no longer around.Just cost to much coin thanks to first so called expert got a nicely rebuilt moter now with a few go faster bits out of it though

Yup, just about to suggest the moving liner scenario, seen a few 3.9 and 4.6 do it.

JC

Don't know if it makes a difference, but it's a DII 4.0-litre. What about oil pressure? Has anyone experienced lack of pressure to the lifters?

Slipped liner/liners is a possibility, but surely the mechanic would have done a visual at least. If he knows Rovers , the steam cleaned combustion chamber is a giveaway, as is the liner being down or up by a mm.

Another possibilty. Now don't laugh, is simply a leak in the exhaust manifold or the join from the downpipe to the manifold. Most mechanics will just drop the manifold away from the head without undoing the pipe.
Regards Philip A