mine also made it to 72k miles b4 i needed to do a valve job ($6k in my neck of the woods)

 

Mine needed bottom end rebuild and new clutch at 70k. Combination of stop-go and long freeway rides. Targa top also dropped, requiring replacement rails and cables. CEL on at 60k. Dealer said 60k service would fix it. Dealer lied.

 

Im at 117k with tray on and no problems. My car never sits in stop and go traffic. Oil needle rarely goes above 9 pm.

 

66K miles and counting...no problems so far, even in Atlanta traffic...tray off, high speed oil cooler fan always on...now, I'm not driving it itoo much lately, with all this pollen dust in the air. My human air intake system is fouled up enough as it is...

 

72k and counting....

 

993: Rock Solid!

 

Twi indies advised me against having the high speed cooler fan always on. In their opinion the risk of burning out the fan is too great...

 

104K on a 95 993
No top end rebuild in sight. (fingers crossed)

As already said, it depends on the type of miles, maint. and other abuse.
Mine appears to have been on I5 for long runs... the interior is in spectacular shape. Looks like someone got in it and drove many miles before getting out.
The shift **** show a little wear but not nearly as much as it should. Seat bolsters are a 9/10.

 

My top end rebuild came at 82,000 due to leakdown test that revealed one cracked exhaust valve. Not sure what cause the toasted exhaust valve but on tear down all valve guides were in need of replacement as being way out of spec. Of course while engine was out of car in went RS clutch and LWFW, new plugs/wires and a dozen other things, new engine rear and front seals and a thorough concours of engine, engine comparment and entire underside of engine, tranny, wheel wells, all the way up to the leading edge of the front valance.

This was not a planned for event moneywise. But, it is quite enjoyable to have the peace of mind that the CEL light will not come on any second and have to be reset, to have an engine that purrs and that is good for at least another 80K with likely no need for top or bottom end work.

But there is no need to jump in to do a top end just because one has xx,xxx miles on the clock. Wait for the symptoms and move at that time. There are too many variables to predict at what mileage one should accomplish a top end rebuild. My $.02 worth.

 

GJ: Did you rconduct leakdown due to a symptom you were experencing? Wondering if the cracked valve was apparent prior to the teardown.

 

At 62K and no issues with top end or any other part of the flat 6. New clutch though, $2300.

 

I'd be surprised that the exhaust valve cracked. What can happen is the valve will lose its seat concentricity and begin to leak. This means that during combustion, it can leak past the valve which causes a "burned valve" and can damage or eat away at the valve itself. This is a more likely scenario than a cracked valve. If the valve cracks, pieces will break off and then you need a new cylinder, piston, and head.

 

192k, and driven come hell or high water....what effin' TOUGH little cars we have!!

 

Mine was done at 58k.