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: Overheating Posted by Snowmobile [Email] (#686) [Profile/Gallery] (more from Snowmobile) on Mon, 4 Jun 2018 08:35:24 In Reply to: Re: Overheating, Tom G [Profile/Gallery] , Sat, 2 Jun 2018 12:38:05 Members do not see ads below this line. - Help Keep This Site Online - Signup |
If you have a 82 degree tstat and the higher temp fan switch, you can get a temperature spike when you come off the highway and the fan does not come on right away. But this only happens with the mismatch and only when coming off the highway, not with regular driving. The fan switch just doesn't think it needs to turn the fan on right away until the coolant gets a bit hotter.
Driving on the highway forces more air through the rad and lets it cool better. If you are getting high temp readings just from normal idling (not after highway driving, but just in general lower speed driving), then you probably need a new radiator. BTDT. Twice. It could also be a bad fan (can test it). BTDT also. But if it comes on at other times, that is probably not the problem...
I did the snowflake switch as a fan button mod, and that was helpful in a way, but what I really needed was a radiator.
I suspect a radiator can fail and still have decent flow through it. Corrosion on fins could reduce heat transfer even if they don't fall off or even if things aren't seriously blocked. If your rad is original, I can almost guarantee that this is your problem simply due to age.
Townsend has great info on c900 cooling systems.
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.