Replacing Valve lifters
Discussion
Hi all, recently purchased a 98' model that had a lifter rattle at 2.5k rpm. Car still drives well so I added an oil treatment to see if it would free up the hydraulic lifters. It has improved the situation but I've gone all in and decided to replace the whole lot.
While I'm doing this I will also do the timing belt and tensioners etc, I am a fairly capable motor engineer so this is no big deal, what I'm wondering is whether to go the whole hog and do the water pump and crank/cam seals at the same time? Is the water pump a major issue? It seems fine at the moment.
Any advice would be greatly appreciated.....
While I'm doing this I will also do the timing belt and tensioners etc, I am a fairly capable motor engineer so this is no big deal, what I'm wondering is whether to go the whole hog and do the water pump and crank/cam seals at the same time? Is the water pump a major issue? It seems fine at the moment.
Any advice would be greatly appreciated.....
Are you certain it's an internal engine rattle and not something like the manifold heat shield or a bracket or something around that area?
The lifters can be removed, stripped, cleaned, filled with fresh oil and put back in. Looks relatively straight forward if a little time consuming.
The lifters can be removed, stripped, cleaned, filled with fresh oil and put back in. Looks relatively straight forward if a little time consuming.
t to the scrapyard asap. MX-5 Lazza said:
As above Gad-Westy - Mk2 onwards doesn't have hydraulic lifters.
I think you might be right about the rattle being elsewhere, such as a heat shield though.
I assumed 1998 = mk1, No? I had a 1998 mk1 1.8 and I'm sure that had hydraulic lifters but could be wrong. Or is the assumption that this is a very early mk2 and mk2's don't have hydraulic lifters? If that's the case I can see why there is some confusion around this on a 1998 car as it could presumably be either. I think you might be right about the rattle being elsewhere, such as a heat shield though.
Gad-Westy said:
MX-5 Lazza said:
As above Gad-Westy - Mk2 onwards doesn't have hydraulic lifters.
I think you might be right about the rattle being elsewhere, such as a heat shield though.
I assumed 1998 = mk1, No? I had a 1998 mk1 1.8 and I'm sure that had hydraulic lifters but could be wrong. Or is the assumption that this is a very early mk2 and mk2's don't have hydraulic lifters? If that's the case I can see why there is some confusion around this on a 1998 car as it could presumably be either. I think you might be right about the rattle being elsewhere, such as a heat shield though.
FastDagda, does your car have pop up headlights?
VladD said:
Doing a quick search on Autotrader for 1998 returns both mk1s and mk2s.
FastDagda, does your car have pop up headlights?
So could presumably be hydraulic or buckets. FastDagda, does your car have pop up headlights?
Still doubt that it's a lifter issue though.
Rattles at certain rpm's tend to be resonant effects where generally things that are fairly static start to move when excited by certain frequencies rather than stuff that is normally moving/rotating anyway. So if it's not an external shield or bracket working loose, the next thing to do would be to remove the cam cover and check nothing has worked loose in there or maybe even a loose spark plug (I've seen that before).
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