Landseer

Have them drop the oil filter into a separate clean container.

Look for metalflake in the oil that dumps out of the filter. No need to drop pan initially.

There are other things that can cause it to stall.

88porsche928

he said he found small amounts of copper and small amounts of almuminum in the oil filter

Landseer

OK, and I saw doc mirror's note on seized.

docmirror

If it stays seized it's more likely the 2/6 rod bearing. Usually, the thrust bearing will loosen up when it cools.

Dropping the pan is a major job because of the crossmember. It's almost easier to pull the engine. Since it's seized, you'll need to take the engine out anyway, and the motor mounts can be replaced from above then.

If the mechanic has a borescope, he can try getting through the oil filler, but he'll need to remove the baffle under there first.

88porsche928

if its the 2/6 rod bearing is it possible to be repaired

AO

It's possible. But it's too early to tell. There could be a LOT of other damage.

At a minimum, you'll need a new crank, 2 new rods, rod bearings, head gaskets, and lot's of labor.

I heard 928 Int'l is going to have a 1/2 off used parts sales this December... Might be cheaper to get a used engine. Just a thought.

88porsche928

bad news he called me and told me the flex plate was bowed out and the crankshaft was pushed forward, im already planning to get a used engine, he said on monday will will try and see if we can save the engine

Landseer

Tell him you need a number for crankshaft endplay, we are curious.
5 thou?
10 thou?
More?

88porsche928

land seer thanks for the post, i will ask him on monday, do you think the engine is the only thing gone at this point or will the transmission need to be replaced too?

Imo000

Unless the crank is really bent/craked form heat or damaged beyond repair, it can (as done frequently with other engines) be re ground to accept oversized bearings and the connecting rods can be easily re-sized too. This is done all the time in the engine rebuild business. the reall issue is, how long did hte engie run with all the metal particles in it and did that couse any other damage.

Black Sea RD

Thrust bearing failure (TBF) is a very real problem for 928 automatics as this unfortunate story tells. The owner now has to decide how much to spend on trying to fix the engine or get another one, with both options ending up to be an expensive proposition any way you go.

Not to mention the down time of not having the 928 to drive, which is often months. At this point some opt to part the car and go on.

These scenarios happen more often than most realize. That's why it is very important to not only check for and release the front flexplate tension but to stop it from returning. There are different options now available.

Our Super Clamp was designed to be the very best solution at the time we designed it and we still feel it is the best out there to stop drive shaft pullout which can lead to TBF. A worthy upgrade while your doing a torque tube R&R. This is where being a bit cheap at that time can cost a lot more later.

All that being said we hope this story has a happy ending for the owner and his 928.

With our condolences,

docmirror

I'm betting the PO knew, and just screwed the buyer.

blown 87

Not a bet I will take.

txhokie4life

Talked to the guys mechanic -- and he said it has a TBF,
not sure of the extent of the failure.

I have the means to pull the engine --

does the case have to be split to perform the repair?
or can all the work be done engine out but otherwise still together.

Or is this a case by case scenario?

thx,

M

AO

I suppose you don't have to separate the block to see the extent of the damage, but if it has TBF, then I think the best course is to sell the old block for scrap and get a new engine.