Hello,
Yesterday my mothers 3200GT came up with a new way of demanding attention (and money) from its owner: Overheating.
Car started and drove perfectly fine on the highway but after spending a minute or two in light city traffic, engine temperature would rise significantly. When I noticed it, temperature had already reached about 115C. At that point, idle got bumped up to 1100rpm but the temperature warning light had not come on. Fans didn't run. We parked and shut it down immediately. No fans prior or after shutdown.
Driving back home on the highway after letting it cool down, temperatures remained stable at 80-85C. Luckily, its just about a minute from highway to our garage but even that pushed coolant temperature above 100C. Parked, shut off and opened the bonnet to prevent the worst of heatsoaking. Again, fans didnt come on at any time.
Was that enough overheating to warp heads? Does this engine have a tendency to drop valve seats or is it safe to restart without further inspection?
Both radiator fans seem to be completely dead, neither low nor high stages work. On the last drive, a week ago, they were fine.
So far I checked fuses and relays in the engine compartments fusebox, all are fine. There are no signs of corrosion, cables and connectors look like new - as everything on this car.
There is a resistor for the low fan stage down the rear of the the radiator which, so far, hasn't been tested. However, as far as I get it, failure of this resisitor should only take out the low stage but not both.
What else is there to look for? Any invalid sensor input (AC?) which could prevent the ECU from turning on fans?
The car will be brought to the dealership for diagnosis and repair but ideally it can be fixed in our garage to such an extent to safely make that half-hour drive through city traffic and modest congestion on its own instead of needing a tow truck.
Any input is highly appreciated.
Yesterday my mothers 3200GT came up with a new way of demanding attention (and money) from its owner: Overheating.
Car started and drove perfectly fine on the highway but after spending a minute or two in light city traffic, engine temperature would rise significantly. When I noticed it, temperature had already reached about 115C. At that point, idle got bumped up to 1100rpm but the temperature warning light had not come on. Fans didn't run. We parked and shut it down immediately. No fans prior or after shutdown.
Driving back home on the highway after letting it cool down, temperatures remained stable at 80-85C. Luckily, its just about a minute from highway to our garage but even that pushed coolant temperature above 100C. Parked, shut off and opened the bonnet to prevent the worst of heatsoaking. Again, fans didnt come on at any time.
Was that enough overheating to warp heads? Does this engine have a tendency to drop valve seats or is it safe to restart without further inspection?
Both radiator fans seem to be completely dead, neither low nor high stages work. On the last drive, a week ago, they were fine.
So far I checked fuses and relays in the engine compartments fusebox, all are fine. There are no signs of corrosion, cables and connectors look like new - as everything on this car.
There is a resistor for the low fan stage down the rear of the the radiator which, so far, hasn't been tested. However, as far as I get it, failure of this resisitor should only take out the low stage but not both.
What else is there to look for? Any invalid sensor input (AC?) which could prevent the ECU from turning on fans?
The car will be brought to the dealership for diagnosis and repair but ideally it can be fixed in our garage to such an extent to safely make that half-hour drive through city traffic and modest congestion on its own instead of needing a tow truck.
Any input is highly appreciated.
, I would check the relays again, there's one on the bulkhead isn't there?
