924Board.org

pyromjm · Joined: 26 Sep 2003 Posts: 154 Location: Cupertino, CA USA

My friend gave me his 79 924 n/a for use as a parts car for my 1982 924 n/a. I know his head has had some work done on it and is probably in much better condition than mine, is it going to be a compatable swap to my later car? Also, what else isnt going to be a compatable swap?
thanks,
-Mike
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1982 924 NA gray/silver with black int.

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

Yes, head is a compatible swap for all 1976-1982 normaly aspirated cars.
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1987 951 - M193 Version for Japan

pyromjm · Joined: 26 Sep 2003 Posts: 154 Location: Cupertino, CA USA

Thanks Chrenan

Do you or does anyone else have any tips that has done headwork or head swap before that wouldnt show up in say a haynes manual or something? Thanks a lot,
mike
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1982 924 NA gray/silver with black int.

AppleBit · Joined: 16 Nov 2002 Posts: 1516 Location: Minneapolis, MN

you will notice on the earlier heads there are exhaust holes that come out on the intake side of the head- just plug these up with bolts to keep the intake running cool.
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Classic British Sports Car Restoration v6 + v8 Engine Conversion Swaps

Porsche 924 Wide Body LS1 Corvette 500 Horsepower Engine

CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

Port match everything, clean up all the welds in the downpipe with a grinder, chase all the threads, and check to make sure the head is flat...

A really good idea would be to disassemble the head, and send it to a shop for a bit of mild porting work. Best money you can spend on getting more out of these engines.
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'81 931 in various states of assembly

Lizard · Posted: Sun Aug 28, 2005 4:21 am Post subject:

one suggestion that I have is if it isnt broken DONT mess with it, unless you have blown your headgasket dont remove your head, leave it and keep the other as a spare, you will need to have the timing set after and a torque wrench and you wont see any improvement really.
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3 928s,

gohim · Joined: 02 Nov 2002 Posts: 4459 Location: Rialto, CA

The middle production models like the 79 have a tendency to crack. Most all normally aspired 924 heads use the same valve size, the exception being some of the very early 77 engines, which may have come with bigger valves. There is a difference in the exhaust port shape over the years, but I prefer the late model head over the earlier.

If your 82 cylinder head isn't damaged and unrepairable, why replace it?

As Lizard already stated, "if it ain't broke, don't fix it!".

pyromjm · Joined: 26 Sep 2003 Posts: 154 Location: Cupertino, CA USA

thanks for the input guys.
The spare head from the 79 has been ported and polished already and i figured it would be cheaper to put it on instead of having my head ported and polished. I really do want to take the head off and rebuild everything for educational purposes and to quiet down the engine which is REALLY noisy and squeaky.
-Mike
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1982 924 NA gray/silver with black int.