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Join Date: Aug 2003
Location: Bothell, WA
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Removed head from 83 944, now what?

Yeah! Got the head removed tonight. PO let the belts break, had them repaired, didn't fix the bent valves. I was mostly concerned about the cylinder walls being scarred or pistons being damaged, but they are pristine. I'll get the head into the shop tommorrow and be on my way. 115K on the car, by the way.
What else while I'm here?
I'm replacing anything rubber, like water hoses and vaccuum lines. Belts, rollers were replaced less than 10K ago by a great P shop. New belts of course.
Water pump, thermostat, too.
The P shop thought the front seal was leaking. I think it may have been just a connector on an auto trans line leaking. But it looks like now would be the time to do a front seal too.
No problem with the oil cooler, but I'm down to it, any reason not to put new rubber in it, too?
I'll clean all contacts and grounds, the car sat for many years and several connectors are a little corroded.
What about cleaning up the cam cover? It is almost powdery to the touch. My brother powder coats, but I'd really rather just clean it up nicely.
Nice to be this far! I was hoping and praying that the block would be spared any damage. And it was!
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83 Silver 944/Auto/Cookie Cutters/No side strip moulding/Extra Saratoga top(w/no hardware though)
1980 Yamaha XS1100 Special My other project and daily driver

My kids say my hair matches the color of the car! Who's getting old?
Old 02-02-2004, 10:56 PM
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Replace the three piece oil pressure relief valve with the appropriate one piece. Air and fuel filters. Drain the gas tank and refill it before you try to start the car.

Belts were only 10K old?

You don't usually see block damage on a broken belt.

Worry about the cosmetics once you get it running.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
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Old 02-03-2004, 05:54 AM
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Sorry, poor explanation.
Belts broke about 6k ago. PO had the belts replaced, but didn't fix the bent valves (almost 10 years ago. Found a receipt for the work after I bought the car stuffed into a corner of the glove box.). Drove the car, for about 3K after that, parked the car in the carport where it sat for several years. I bought it a few months ago. I've put on about 3K.
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83 Silver 944/Auto/Cookie Cutters/No side strip moulding/Extra Saratoga top(w/no hardware though)
1980 Yamaha XS1100 Special My other project and daily driver

My kids say my hair matches the color of the car! Who's getting old?
Old 02-03-2004, 07:27 AM
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SoCal, I still don't think I answered the question.
I have no idea how old the belts were when they originally broke. Could have been 110K!?
Now they only have 6k on them but they are 10 years old.
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83 Silver 944/Auto/Cookie Cutters/No side strip moulding/Extra Saratoga top(w/no hardware though)
1980 Yamaha XS1100 Special My other project and daily driver

My kids say my hair matches the color of the car! Who's getting old?
Old 02-03-2004, 07:32 AM
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If it were my car and I was going to all this trouble, I would definitely not put any faith in a 10 year old belt. Belts are cheap compared to what you're doing now, so replace them.
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Grant
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1989 Porsche 944, 1973 VW Beetle - gone but not forgotten
Old 02-03-2004, 07:36 AM
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Man, the valves were already bent. What is he gunna do bend them again? lol
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Old 02-03-2004, 08:16 AM
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You should replace the belts if more than 5 years old in any case.
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Old 02-03-2004, 08:29 AM
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10 year old belts, damn thats more than my age!
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Old 02-03-2004, 10:05 AM
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Guys, I AM replacing the belts. And just about anything else made out of rubber.
I wouldn't trust ten year old belts with 0 miles on them.
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83 Silver 944/Auto/Cookie Cutters/No side strip moulding/Extra Saratoga top(w/no hardware though)
1980 Yamaha XS1100 Special My other project and daily driver

My kids say my hair matches the color of the car! Who's getting old?
Old 02-03-2004, 10:24 AM
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Quote:
Originally posted by 338WIN
Guys, I AM replacing the belts. And just about anything else made out of rubber.
I wouldn't trust ten year old belts with 0 miles on them.
Oops, didn't catch that.
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Grant
1974 Vespa Rally 200, 1974 Vespa Primavera 125, 1963 Solex 2200, 1938 Buick Special, 2008 Mini Cooper S, 2010 Mazda CX-9, 1986 VW Vanagon Syncro Westfalia, 1989 VW Doka Tristar - in the stable
1989 Porsche 944, 1973 VW Beetle - gone but not forgotten
Old 02-03-2004, 10:27 AM
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I'm curious as to what the compression is with those bent valves?

If the compression is within tolerance across the four cylinders then I question if the valves were actually bent. With a belt break this would be close to a miracle.

Yes about three years on a set of belts regardless of mileage and they should be replaced.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 02-03-2004, 10:44 AM
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I am not sure to what the compression ratio was with his bent valves, but I do know that when I bent my valves, my ratio was 1:1. Was not producing much horsepower then. Pretty hard to drive with. I think I had about 4 man power.
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Old 02-03-2004, 12:53 PM
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According to the leakdown test (done ten years ago!) it was like 4% 38% 34% 14% front to back. It actually ran really well once you got off idle. I'm anxious to see if I can notice more power when it goes back together.
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83 Silver 944/Auto/Cookie Cutters/No side strip moulding/Extra Saratoga top(w/no hardware though)
1980 Yamaha XS1100 Special My other project and daily driver

My kids say my hair matches the color of the car! Who's getting old?
Old 02-03-2004, 05:23 PM
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I would, in retrospect, have done my front oil seals. I did the head 8 months ago and in december, back in to do the seals. In the grand scheme of things I was basically already there having changed belts and rollers at that time.

I think we are all confused at how the belts went and the car still drove....misinformation by the PO maybe.
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Old 02-03-2004, 05:23 PM
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Britwrench, are you recommending any particular machine shops in the area for a head rebuild?
I live in Bothell and work in Snohomish, was going to take it to a shop in Everett recommended by Conaway.
Thanks
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83 Silver 944/Auto/Cookie Cutters/No side strip moulding/Extra Saratoga top(w/no hardware though)
1980 Yamaha XS1100 Special My other project and daily driver

My kids say my hair matches the color of the car! Who's getting old?
Old 02-03-2004, 08:25 PM
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338WIN -

Dismantle the head. Order new valves, guides, stem seals, head gasket set, and check your springs and valve seats. Get your cylinder head milled at a reputable auto machine shop and have them install the new valve guides. Re-assemble and intstall the head.

Save $a_whole_bunch.

Good Luck
Old 02-04-2004, 10:48 PM
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how many hours would be to replace stem seals and guides?I mean that only,head removal is apart.

Is it not enough to change that, instead of valves and springs too when this is correct?
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Old 02-04-2004, 11:10 PM
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