1979-1993 & 94 Conv [Subscribe to Daily Digest] |
 | [Main C900 Bulletin Board | BBFAQ |
Prev by Date | Next by Date | Post Followup ]
Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: Hot runnin 84T Posted by Saana88 [Email]  (#207)  [Profile/Gallery]
(more from Saana88) on Mon, 7 Aug 2006 22:10:47
In Reply to: Hot runnin 84T, Max H, Mon, 7 Aug 2006 18:43:53 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Probably a couple of problems here, all of which I've experienced and subsequently fixed on my '88.
1. Faulty or dying thermoswitch: doesn't tell the cooling fans to turn on until you've reacted and turned the heater on in the middle of August. They die with age. Mine kept turning the fan on later and later and the temp needle went sky-high before the fans cut in.
2. Corroded contacts and connectors (alliteration, aye!) on the fan time delay relay, located on the driver's side fender flange. The symptom of this on mine was the fan coming on in short spurts (only when told to do so by the thermoswitch) instead of coming on and staying on for a while until the car actually cools itself thoroughly. You'll also notice that if you switch the car off while the fan is running, the fan won't stay on unless the relay is doing its job.
3. Gunked up, leaking, or poor-quality rebuild on the radiator. If it doesn't leak (no green stains?) and your coolant is clean (flush every other year!) then you've got a crap rebuild like I did.
3a. Outdated, possibly leaking expansion tank cap. If it's black, I recommend getting the new, improved yellow one (more reliable). These also fail with age. If you open the expansion tank and you don't hear much of a hiss when the car is pretty warm, chances are that cap is no longer holding pressure, not allowing the coolant to do its job and giving your engine hot spots on the head. Cheap insurance it is.
The temp gauge needle should be around horizontal. If it's close to the red hash mark, it's not horizontal and something is not working right. Fortunately, the most expensive item above is a $120 radiator (the thermoswitch is ten bucks, so is a thermostat and the expansion cap.)
, Wed, 9 Aug 2006 06:23:12, Mon, 7 Aug 2006 22:10:47 <-- Viewing This Message
, Mon, 7 Aug 2006 19:41:42
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
 |
 |
 |
 |
 |
