Porsche 924 The Porsche 924 was produced from 1976 to 1988 was a two-door, 2+2 seat sports car coupe.

1980 924 Turbo (931) - Interference engine??

  #1  
Old 09-05-2007, 08:33 AM
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Default 1980 924 Turbo (931) - Interference engine??

Hey all,

I've got a chance to aquire a 1980 924 Turbo that has been sitting for many years. 55K miles, i believe the timing belt was changed prior to it sitting...but that was 15 years ago when it was finally parked. So, i'm going to change the timing belt before i even try to turn it over. I was wondering... is the 924 Turbo an interference engine? Also, does it have an auto tensioner?

Thanks!
Shamus
 
  #2  
Old 09-05-2007, 08:56 AM
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Join Date: Apr 2005
Location: Overland Park, KS
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Default RE: 1980 924 Turbo (931) - Interference engine??

I know the 2.0 NA engine was a non interference engine, but for some reason it is sticking in my mind that the 931 was indeed an interference engine. I can do some research and let you know for sure.
 
  #3  
Old 09-05-2007, 09:32 AM
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Default RE: 1980 924 Turbo (931) - Interference engine??

Thanks so much!! I tried to find info through google..but have had no success.

 
  #4  
Old 09-05-2007, 09:39 AM
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Default RE: 1980 924 Turbo (931) - Interference engine??

Yes, the turbo is an interference engine.
 
  #5  
Old 09-05-2007, 09:49 AM
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Join Date: Sep 2007
Posts: 13
Default RE: 1980 924 Turbo (931) - Interference engine??

Does it have an automatic tensioner like other 924's..or is it similar to the 944 (regarding steps to change the timing belt)

thanks,
Shamus
 
  #6  
Old 09-05-2007, 06:16 PM
Join Date: Dec 2004
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Posts: 6
Default RE: 1980 924 Turbo (931) - Interference engine??

Sorry, no auto tensioner. But it's an easy one to do, unlike the 924S / 944 engines.
 
  #7  
Old 09-05-2007, 08:23 PM
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Join Date: Sep 2007
Posts: 13
Default RE: 1980 924 Turbo (931) - Interference engine??

got any tips for me? I've done timing chain replacements on old 86 toyota turbo pickups...and there's always some hidden bolt, or some trick to make it easier.Hopefully it's not as involved...

With a 22r/re/rte engine:2

remove radiator + hoses
removepully belts
remove distributor cap
remove valve cover
Find TDC, mark distributor, pop crank bolt of by bumping starter with breaker bar against frame
Find TDC again (lol)
Remove powersteering pump
Remove water pump
Remove hamonic balancer
Remove oil pump
remove oil pan front bolts
remove distributor
remove hidden bolt underneath oil
remove timing cover
remove cam gear
(and that's just to get to the timing chain)....


~Shogun
 
  #8  
Old 09-05-2007, 09:19 PM
Join Date: Dec 2004
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Posts: 6
Default RE: 1980 924 Turbo (931) - Interference engine??

It's pretty straight forward.

Remove the belt cover.
Loosen the tensioner wheel.
Remove old and put on the new belt.
Tension until you can only twist the belt 90°.

If it whines after tensioning, you have it too tight. Back it off slightly.

New belts are cheap. Valves are VERY expensive!
 
  #9  
Old 09-06-2007, 07:12 AM
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Join Date: Sep 2007
Posts: 13
Default RE: 1980 924 Turbo (931) - Interference engine??

wow...that IS really easy! smart design!

thanks,
Shamus
 
  #10  
Old 11-17-2007, 03:15 AM
Join Date: Nov 2007
Posts: 5
Default RE: 1980 924 Turbo (931) - Interference engine??

anybody got a link on how to do it? i just got my 924 NA 2.0L and am getting the maintenance up to date. what i really need is pics of the timing marks and info on where they are.
 
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