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85.5 944 head studs

ok, I just recently purchased an 85.5 944, more like 8 days ago. the guy i bought it from did something stupid. he reported the vehicle to cali dmv as junked and now my title is gona have the salvage on it. besides that. the car was not running but the guy i got it from, he got it from his dad, his dad took care of it, we are talking records of every little thing he did, and what he put in how much it cost, etc. well the car came with all the parts to fix it and some special tools. i got the car running in 3 days she turned right on after changing the cylinder head gasket. i let her idle for like about an hour, reving it up every once in a while just to check for leaks or anything i missed. it was all perfect. so the test drive. i dont even get out of the driveway, BANG timing belt broke. no prob change it check valves. one bent exhaust valve. no prob easy fix. buy new valve, lap new valve, change all valve seals. sent head to shop to get checked. ok head and cam housing put back on set timing etc. now i only get 100 psi on compression, prior i was getting 168-176 psi. took head of again inspected everything. it's all within it's limits. took out cylinder head studs. noticed that no 2 were the same height. need to replace, were the heck do i buy them, called local german car parts store, no luck, checked www no luck. anyone have same prob? or an idea of were to obtain. checked a.r.p. they dont make them for this car.
Old 07-24-2004, 08:42 PM
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Old 07-24-2004, 10:37 PM
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There's no problem with the studs, what's happened is that the studs have pulled out of the block. This can be repaired by timeserts. You will need to make up a special tool to extend the timesert tap as the studs are deep in the block.

This is quite common with 944 engines that have been severely overheated.

Low compression is proabably that some of the valves are still bent. You need to do more diagnosis to check what the actual problem.

Replace the water pump, rollers, oil seals and all the belts this time.
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Last edited by Britwrench; 07-25-2004 at 07:17 AM..
Old 07-25-2004, 06:31 AM
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the studs did not pull out of the block, after removing them which was a very difficult and long process, i measured each individual stud and no 2 were the same size. they were definetley streched. i borowed the borescope from my work check the threads and they seamed fine.
Old 07-25-2004, 09:27 AM
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The studs stretch.

The studs are meant to be single use....but you can usually get away with a few extra head pulls without any problems.

AND PULLING THE STUDS IS A PAIN. The ones on the intake side being the worst.

I would not rule out a cracked head.

I would stay with the stock studs unless you plan on pulling the head every other weekend.....Then the ARP studs would be more cost effective over the long run. The stock studs cost me $11 canadian ($8 U.S)/ each from the dealer..
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Old 07-25-2004, 12:17 PM
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thanks ae1969, i took the head to the shop and had it checked, the head is fine the valves are fine and all so i just replaced the valve seal for good measures. yes it was a pain i had to take a nap after i had pulled them. i problaly will go with the stock ones since i do not plan on pulling the head for a very long time.
Old 07-25-2004, 12:23 PM
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well i found the studs at an excellent price 3.33 U.S. from auto atlanta. part # 944-101-197-00 if you ever need to know that. thanks for the replies and now i sit and wait for the big brown truck. total for 10 studs 10 nuts 10 washer and a gasket set 155.00 i did a lot of shoping around.
and i did take the opportunity to change all the belts and the water pump was fine. looks kinda new. head came back from shop all nice and shinny, looking new.
Old 07-30-2004, 09:26 PM
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