In Reply to: Engine heat-How to get more? Already replaced T-stat,, nicknick [Profile/Gallery] , Sat, 27 Nov 2010 10:41:18

Nick,
Unless one car remain being stock and another has an engine grinded to diesel-specs compression value or you've done with SVC mod (Saab Variable Compression) or other similar stuff there's nothing to assume that both engines to be running in the same conditions - i.e. they're producing the same power, or in other words, the same amount of heat per time unit. Heat can also be dissipated thru engine body, exhaust system and so on, but it mostly goes thru the radiators. And it's the thermostat that runs the heat flow. Nothing else but the thermostat.
So long story short: if the weird car doesn't have 5" exhaust or paper-thin engine body or its engine is runnin with 14-and-above compression ratio - it's the thermostat.

Zig

P.S.
You can check it for sure and it will only cost you some gas and 30 minutes: start it up and keep checking upper-rad + lower-rad + cabin heater hoses until it warms up enough to turn the fan on.
Good thermostat will give you cabin heater hoses that will be warming up first and only (!) after that it'll start heating up the radiator hoses.
Bad thermostat will heat up all the stuff all together at the same time.

P.P.S.
And check the ignition timing, it can be set to be too early.

posted by 77.37.1...

• Engine heat-How to get more? Already replaced T-stat,, nicknick , Sat, 27 Nov 2010 10:41:18
  • Re: T-stat, checking, Saabnutt, Sun, 28 Nov 2010 20:07:06
  • Re: Engine heat-How to get more? Already replaced T-stat,, PaulS , Sun, 28 Nov 2010 15:10:16
    • Thanks-it was the first thing i checked, easy to get, nicknick , Sun, 28 Nov 2010 15:49:56
  • Re: Engine heat-How to get more? Already replaced T-stat,, vvack0matic , Sat, 27 Nov 2010 21:35:33
    • Mmmmm.....I have the 3.0 with '88 injectors, so maybe, nicknick , Sun, 28 Nov 2010 03:14:14
      • Re: Mmmmm.....I have the 3.0 with '88 injectors, so maybe, vvack0matic , Sun, 28 Nov 2010 06:28:24
  • Re: Engine heat-How to get more? Already replaced T-sta, Cary, Sat, 27 Nov 2010 20:07:06
  • My '90 SPG runs about 1/3 or less up the gage....., vsfoxe , Sat, 27 Nov 2010 15:52:05
    • No bypass nonsense! Thanks, nm, nicknick , Sat, 27 Nov 2010 18:34:54
  • I don't believe in miracles, Siegfried, Sat, 27 Nov 2010 13:46:03 <-- Viewing This Message
    • Timing is something to check-thanks,Nick-nm, nicknick , Sat, 27 Nov 2010 18:33:16
  • you could do the cardboard in front of radiator trick.., baggsly , Sat, 27 Nov 2010 11:30:39
    • No! Good thoughts-I think i'll check out seats next-nm, nicknick , Sat, 27 Nov 2010 11:36:24

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