96Holly
Well-known member
'96 LT4. I installed a Mez. elec water pump last year. (no problems up to this point.) I just replaced all three relays (they tell me the 4 prong relays are no longer made?) and replaced the main fan moter and repled a blown fan fuse. (I am assuming the fuse blew when the fan motor blew...)
Once all was installed, filled with coolent and bubbles purged (I think) and stared, all was well. Fans came on at right temp and also came on with the A/C on. It cycled through the 229 fans on and off at the lower temp with no issues.
I got it on the road yesterday and wham... about 1.5 miles down the road my analog temp gage was pegged and my degital was on the way up. I didn't bother checking the gages being so close to home and started out with a cold engine. I got it home with bubbles churning from the overflow tank and both gages way to hot... (unfortionatly it ran for about 5 minutes or less with my check gages light on)
I plan on hard wiring the fans and water pump and run it down the road to see if something isn't correct there.
Why would it only overheat under load and not at idle? Any ideas/comments would be approciated.
Once all was installed, filled with coolent and bubbles purged (I think) and stared, all was well. Fans came on at right temp and also came on with the A/C on. It cycled through the 229 fans on and off at the lower temp with no issues.
I got it on the road yesterday and wham... about 1.5 miles down the road my analog temp gage was pegged and my degital was on the way up. I didn't bother checking the gages being so close to home and started out with a cold engine. I got it home with bubbles churning from the overflow tank and both gages way to hot... (unfortionatly it ran for about 5 minutes or less with my check gages light on)
I plan on hard wiring the fans and water pump and run it down the road to see if something isn't correct there.
Why would it only overheat under load and not at idle? Any ideas/comments would be approciated.