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Bockscar
Joined: 16 Nov 2010
Posts: 392
Location: Sandy, Oregon
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 Posted: Mon Dec 20, 2010 3:44 am Post subject: What a surprise! |
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A few weeks ago, I bought a 1981 931 for the sum of $300. In the description of the craigslist ad, it said it had a "new engine". As the story goes, the original owner joined the army and got shipped away and he left the car with his sister. The story seemed a little too good to be true.. Until recently 
Fast Forward to today:
Because of the utter disarray the engine was in (electicals unplugged, hoses just hanging every which way), we decided to lobotomize the engine to see if the engine was really new. Out exterior of the engine didn't appear to be, it was very dirty and there was all kinds of dirt and debris littered about the engine bay. As you can see from the picture above, the top of the head appears to be all new components, devoid of any wear or oil!
We stopped short of taking the head off because we couldn't figure out how to get the exhaust off without making an entire day of it. On a side note, is it possible to simply disconnect the turbo and pull the head off with the exhaust manifold attached?
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Brian
'79 924 - Restoration In Progress
'81 924 Turbo w/EFI - Scrapped |
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Rich H
Joined: 10 Jun 2007
Posts: 2665
Location: Preston, Lancs, UK
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| Posted: Mon Dec 20, 2010 3:56 am Post subject: |
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'Simply disconnect the turbo'
If the hardest job on the car is simple then you'll have no problems! 
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1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Mon Dec 20, 2010 3:56 am Post subject: |
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Possible, but less time consuming in the long run to pull the motor, IMO.
Also, please cover that turbo outlet with a rag or plastic bag before some murphy-propelled item falls in there.
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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stevekat
Joined: 19 Jan 2008
Posts: 719
Location: Los Angeles, CA
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| Posted: Mon Dec 20, 2010 4:04 am Post subject: |
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Not sure I see the wisdom of taking the head off if all the components look new. If they are, it is reasonable to assume a valve job has been performed. Once the head is off, would you then remove the pistons to examine the rings, etc.? Pressure test the head? The block?
I think the most reasonable course is to make sure all your marks are in the proper place, perhaps do a leak down.
Just a thought experiment.
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"Never get out of the boat. Absolutely goddamn right. Unless you are goin' all the way."
Gone to new home: '81 924T, US version, CGT Intercooler, UTCIS-PT, Euro DITC, Greddy Trust MBC, Forged Fuchs Flat Dish 6's, Factory Recaro's. |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Mon Dec 20, 2010 4:10 am Post subject: |
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+1
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Toofah King Bad
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Bockscar
Joined: 16 Nov 2010
Posts: 392
Location: Sandy, Oregon
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| Posted: Mon Dec 20, 2010 4:34 am Post subject: |
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| stevekat wrote: | | Not sure I see the wisdom of taking the head off if all the components look new. |
The main reason why I decided to take the head off is because it appears that some kind of rodent made its home right above the spark plug holes which don't have any spark plugs in them. Each spark plug hole is full of dirt and gunk and I'm afraid more crud has fallen into the combustion chambers.
And I didn't want to just assume the engine was brand new and assembled by a responsible person. For example, when we took the valve cover off, we discovered a large washer laying in there. Not sure if it would have caused any problems in the feature but, it was a good find. We're probably got to stop once we verify there is no gunk in the combustion chambers.
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Brian
'79 924 - Restoration In Progress
'81 924 Turbo w/EFI - Scrapped |
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Bockscar
Joined: 16 Nov 2010
Posts: 392
Location: Sandy, Oregon
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| Posted: Mon Dec 20, 2010 8:50 am Post subject: |
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Here's a good picture of the spark plug holes. It's bad. It's almost as if someone or something packed all of this muck in there. It looks like this on each of the 4 holes.
FYI, I normally have blue rags in each of the ports and other open holes. I took the rag out for this picture and promptly replaced it afterwards 
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Brian
'79 924 - Restoration In Progress
'81 924 Turbo w/EFI - Scrapped |
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captainspaulding
Joined: 08 Jul 2010
Posts: 48
Location: Round rock Texas
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| Posted: Mon Dec 20, 2010 10:04 am Post subject: |
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Time to pull the motor inspect to see what you have. Then replace what ever seals may be leaking and give it a good detail.
Sounds like fun.
kyle
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1994 VW Golf sport rally cross beast
2003 Dodge ram 2500 cummins family hauler
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Joes924Racer
Joined: 03 Nov 2002
Posts: 11964
Location: Oregon, Denver Colorado native!
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| Posted: Mon Dec 20, 2010 10:07 am Post subject: |
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Wow yea thats pic says it all.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo. |
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Dutch924-racer
Joined: 23 Jul 2007
Posts: 1081
Location: The Netherlands
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| Posted: Tue Dec 21, 2010 6:45 pm Post subject: |
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looks like a mouse has been living there.
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937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
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leadfoot
Joined: 11 Dec 2002
Posts: 2222
Location: gOLD cOAST Australia
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| Posted: Wed Dec 22, 2010 7:14 pm Post subject: |
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insert "squeaky clean" and "runs quiet as a mouse" joke here...
Stu
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1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress... |
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Bockscar
Joined: 16 Nov 2010
Posts: 392
Location: Sandy, Oregon
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| Posted: Fri Dec 24, 2010 4:14 pm Post subject: |
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| Dutch924-racer wrote: | | looks like a mouse has been living there. |
Indeed!
Don't mind the blood in the first picture; I didn't realize how heavy the head was going to be and I crushed my finger while lifting it out.. Whoops!
Anyway, it appears that a mouse did indeed make its home on top of one of the pistons. Actually, there was debris on top of each of the pistons, some more than others. Talk about an interesting find.
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Brian
'79 924 - Restoration In Progress
'81 924 Turbo w/EFI - Scrapped |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Sat Dec 25, 2010 1:48 am Post subject: |
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Your blood sacrifice will be rewarded, my son. Toofahs love blood!
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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Dutch924-racer
Joined: 23 Jul 2007
Posts: 1081
Location: The Netherlands
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| Posted: Sat Dec 25, 2010 7:19 pm Post subject: |
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Nice engine !
I think with some dismanteling and cleaning you have got a nice find!
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937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller |
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