2ndof2

I've tried several different additives and an engine detergent/flush at the Jiffy Lube in the past to try to remedy the problem. Several of you guys suggested things like Rislone, Magical Mystery Oil (or some other silly name something like that). The car seems to be clicking even more now. I'm due for another oil change in about a week or so, but short of trying the screwdriver as a listening tool, which BTW I've tried to do to locate the source of the noise, I really don't know what is wrong. The car now has about 130K miles. Is it unusual for the motor to have a lifter broken or a bad valve at this mileage without the car having been abused? I fear a very large repair bill, especially since I've been actively searching for a 993 which will limit my ability to spend alot on my 928. If it is in fact a lifter problem that is intermittent, what exactly are we talking about both in terms of cost of repair and/or damage if I don't address the problem right away? It clicks REALLY loud sometimes and then tends to go away once I've driven at highway speed for a while. Could this be an oil pickup problem causing it? I haven't noticed any loss of oil pressure although the motor does have some seals leaking at the front that should be replaced as well. Kinda bummed, I've spent alot trying to keep this thing running well.

2V4V

How often do you drive the car? What oil weight are you using?
Synthetic or "standard" oil?

These *seem* to be the bigger "x"s in the equation that I have seen (with more than a few 928s) that just are not run often.

The "drive more often" solution seems to have the best track record. One of the wonderful properties of synthetics is their ability to "flow" places a conventional oil won't- might help get the lifters pumped up - it will definately find every leaky gasket you have (there's always a downside).

It *is* an old car, age gets the better of all of us eventually. A lifter still may be sticking despite all your best efforts to the contrary - sometimes it just works that way. If the noise goes away with use, I don't know that I'd worry, IF I was sure it ws the lifters. But I woould not make any guarantees without actually looking at the car.

Personally, if the motor fragged, you could swap in anouther one for less than it would cost to rebuild the first. Just a thought...

Greg

Weissach

Well, if your looking for an easy fix... here it is. Put in 50W mineral motor oil. This usually fixes all ugly engine noises on old cars. Used car dealers use it allot...

rixter

just my 2 cents but, I was getting a tapping sound in the mornings, figured a lifter was sticking... I went to SITM and ran her real good on the highway 4 hours up and back, and in the mountains, damn if the bloody tapping isn't now GONE... spoke to some folks and they seem to think the high rpms for the long distance freed it up
Rixter

Nicole

I think they call this an "Italian tune-up"...

Old & New

That would be "Marvel Mystery Oil". Add a quart before your oil change (but don't overfill), run the $hit out of it -hard- for a few days, then change the oil. It should straighten out pretty quickly. These cars need to be driven. YMMV

2ndof2

I drive the car every day and of late have tried heavier weight dino oil. I also run it up in 1st a bit each day just to give the motor some workout as it should be. I'm noticing that highway use is NOT making the clicking go away like it used to and suspect that the Mystery Oil may have thinned things out too much causing increased clicking. It'll get an oil change with 50 weight next week and we'll see how it goes. Just not interested in having the motor dismantled to repair it the right way with a possible 993 on the way soon! Car will get less use or be sold to a good home. The car could use about $2K in work but that is mainly labor cost to replace some leaky motor seals and the lifter (if thats what it is causing the noise). I'll post if that scenario happens. Got my eye on a '95 993 6speed that is restraining my spending on the 928 since I doubt I'd get all my money back for all the labor costs. Better to let someone do that work to it and still get a good deal on the car. For now just want to make sure it gets the basic maintenance it requires to keep it on the road and live with the oil drips.