98c5/a4 overheating
Thread Starter
Advanced
Joined: Dec 2013
Posts: 78
Likes: 0
From: Atlanta Ga.
Need a little more info. When the drivers side fan comes on around 180, does the passenger side fan also come on? Do they both go off at the same time or just the drivers side???
Side question. How long have you had the car and have you driven it before in warmer (hot?) weather?
Side question. How long have you had the car and have you driven it before in warmer (hot?) weather?
had the car since 2004,, yes have had it in Miami and at the track every weekend..
Thread Starter
Advanced
Joined: Dec 2013
Posts: 78
Likes: 0
From: Atlanta Ga.
I will not make that recommendation.
I would be concerned asking someone else to "try" an electrical related change unless I had hands on myself. Basically I don't want to assume responsibility without being able to do some testing to see if the wiring to the base of the fuse box warrants changing the orientation of the relays.
Electrical experimentation can become costly in a big hurry.
But if we could get someone with a 98 to give us a picture of their fuse box and the relays were in the same orientation as on the 99, I would reconsider. Unlikely that within a model year that the fuse box wiring would have been changed. Not impossible but unlikely.
I would be concerned asking someone else to "try" an electrical related change unless I had hands on myself. Basically I don't want to assume responsibility without being able to do some testing to see if the wiring to the base of the fuse box warrants changing the orientation of the relays.
Electrical experimentation can become costly in a big hurry.
But if we could get someone with a 98 to give us a picture of their fuse box and the relays were in the same orientation as on the 99, I would reconsider. Unlikely that within a model year that the fuse box wiring would have been changed. Not impossible but unlikely.
Thread Starter
Advanced
Joined: Dec 2013
Posts: 78
Likes: 0
From: Atlanta Ga.
Thread Starter
Advanced
Joined: Dec 2013
Posts: 78
Likes: 0
From: Atlanta Ga.
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 481
From: OK
Plus for whatever it's worth .... every pic I've seen has the little dog ear on the relay facing the fender like the ONE you have that you haven't changed and NOT like the other two you replaced... just sayin...
To me the evidence is mounting that those two are in the WRONG orientation..
Last edited by 73Corvette; May 31, 2015 at 07:33 AM.
Thread Starter
Advanced
Joined: Dec 2013
Posts: 78
Likes: 0
From: Atlanta Ga.
I will not make that recommendation.
I would be concerned asking someone else to "try" an electrical related change unless I had hands on myself. Basically I don't want to assume responsibility without being able to do some testing to see if the wiring to the base of the fuse box warrants changing the orientation of the relays.
Electrical experimentation can become costly in a big hurry.
But if we could get someone with a 98 to give us a picture of their fuse box and the relays were in the same orientation as on the 99, I would reconsider. Unlikely that within a model year that the fuse box wiring would have been changed. Not impossible but unlikely.
I would be concerned asking someone else to "try" an electrical related change unless I had hands on myself. Basically I don't want to assume responsibility without being able to do some testing to see if the wiring to the base of the fuse box warrants changing the orientation of the relays.
Electrical experimentation can become costly in a big hurry.
But if we could get someone with a 98 to give us a picture of their fuse box and the relays were in the same orientation as on the 99, I would reconsider. Unlikely that within a model year that the fuse box wiring would have been changed. Not impossible but unlikely.
I just sent you an email with 98 fuse box pic!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Thread Starter
Advanced
Joined: Dec 2013
Posts: 78
Likes: 0
From: Atlanta Ga.
Responded to your email.
Based on the picture you just emailed and the picture from your friends 99 above, it looks to me like your relays are installed wrong. I am comfortable suggesting that you turn the two relays in question, 43 and 45, 180 degrees so that the cut corners face the fuse box. Post back how the fans operate when you have given them a try.
Based on the picture you just emailed and the picture from your friends 99 above, it looks to me like your relays are installed wrong. I am comfortable suggesting that you turn the two relays in question, 43 and 45, 180 degrees so that the cut corners face the fuse box. Post back how the fans operate when you have given them a try.
Thread Starter
Advanced
Joined: Dec 2013
Posts: 78
Likes: 0
From: Atlanta Ga.
I need some time to review all the posts in this thread before going any further. I am thinking you will need to check electrical connections as well as grounds based on the continuing symptoms especially one fan going off after running a short period of time.. I will post back later today......
Thread Starter
Advanced
Joined: Dec 2013
Posts: 78
Likes: 0
From: Atlanta Ga.
http://forums.corvetteforum.com/c5-t...erheating.html
I'm not totally convinced that the cooling system does not have air trapped in it. Please look through the above thread and if you have time please use the procedure described to insure that all air is bled out of the system. Let me know if you have questions about using this procedure.
I'm not totally convinced that the cooling system does not have air trapped in it. Please look through the above thread and if you have time please use the procedure described to insure that all air is bled out of the system. Let me know if you have questions about using this procedure.
thx
Thread Starter
Advanced
Joined: Dec 2013
Posts: 78
Likes: 0
From: Atlanta Ga.
http://forums.corvetteforum.com/c5-t...erheating.html
I'm not totally convinced that the cooling system does not have air trapped in it. Please look through the above thread and if you have time please use the procedure described to insure that all air is bled out of the system. Let me know if you have questions about using this procedure.
I'm not totally convinced that the cooling system does not have air trapped in it. Please look through the above thread and if you have time please use the procedure described to insure that all air is bled out of the system. Let me know if you have questions about using this procedure.
also i checked the sensor that is behind the altenator and it is fine..
Thread Starter
Advanced
Joined: Dec 2013
Posts: 78
Likes: 0
From: Atlanta Ga.
If it were me I would loosed the bolt and wiggle the metal tube to get the coolant to start flowing. I would also do it with the engine running so the water pump is trying to move coolant. The reason I wouldn't just remove the black hose is because of the small diameter of the steel tube, the age of your car and this thing called rust/scale that forms on steel. Do both sides!!!!!!!
https://www.corvetteforum.com/forums...stumped-2.html
post #27.......
Of course you can try just the rubber tube and see if air followed by coolant flows out.
Either way let if flow as you can easily add several ounces of distilled water or 50/50 mix of coolant and distilled water to the surge tank when you are done to bring the coolant to the proper level..
This is NOT going to solve the issue with the fan operation but I think the car is running way to hot and I think it is because of trapped air.
https://www.corvetteforum.com/forums...stumped-2.html
post #27.......
Of course you can try just the rubber tube and see if air followed by coolant flows out.
Either way let if flow as you can easily add several ounces of distilled water or 50/50 mix of coolant and distilled water to the surge tank when you are done to bring the coolant to the proper level..
This is NOT going to solve the issue with the fan operation but I think the car is running way to hot and I think it is because of trapped air.
Thread Starter
Advanced
Joined: Dec 2013
Posts: 78
Likes: 0
From: Atlanta Ga.
Well i loosned the drivers bolt and it took about a min. then coolant came streaming out.. same thing for the passenger side.. (did not hear any air releasing) but u figure there had to be some in there for it to take a min. to flow coolant. So i test drove it and it seemed it took longer to over heat, but it still did..260 then I shut it down. Man I dont see what else to possibly try! There has got to be something going on with that fan not coming on.. say a rodent(rat) did chew through something,, how would i ever be able to tell? Should I take it to the dealer and have them check it at this point?