John Moore
I'm Awesome
Hey guys,
Middle of summer here in NC and it’s been brutal. Today was right at 100 degrees and I’ve been having problems with my 2000 Z71 Tahoe overheating at idle.
I’ve been having this issue for a while now and here is what I’ve done so far:
Replaced water pump
Replaced the radiator with dual row 2-1/2”.
New thermostat 195 I believe. Whatever it called for.
I have the factory 11 blade fan with a severe duty clutch that stays engaged almost all of the time.
I have the factory Auxiliary cooling fan in front of the condenser (tested).
I don’t know the ratio exactly but it’s dexcool/distilled water good to -15/-20 degrees.
Under the hood I can feel a ton of extremely hot air coming from the fan, the engine bay is ridiculously hot. I have several cars and none of them are this bad.
On the road it runs 189 degrees, not a problem at all. When I have it Idled for a period of time, I’ve seen in climb to 230+ Along with the transmission temp climbing to 220. Today the AC compressor was cycling off, I assume the head pressure was too high, even at 1200 rpm it would not cool itself down much until you get on the road.
The ignition timing at idle is around 22-24 degrees which seems very low to me. For the most part it runs good, I have an intermittent random misfire I’ve been chasing recently but I believe that’s unrelated since I’ve had this issue for a while.
The AC doesn’t cool the best, on a hot day It will not keep up at all. I had the grill off a while back and made sure everything was clean and clear of any airflow obstruction.
Could the condenser be bad internally causing this buildup of heat?
I have no clue what to do next, any help would be greatly appreciated.
Thanks
Middle of summer here in NC and it’s been brutal. Today was right at 100 degrees and I’ve been having problems with my 2000 Z71 Tahoe overheating at idle.
I’ve been having this issue for a while now and here is what I’ve done so far:
Replaced water pump
Replaced the radiator with dual row 2-1/2”.
New thermostat 195 I believe. Whatever it called for.
I have the factory 11 blade fan with a severe duty clutch that stays engaged almost all of the time.
I have the factory Auxiliary cooling fan in front of the condenser (tested).
I don’t know the ratio exactly but it’s dexcool/distilled water good to -15/-20 degrees.
Under the hood I can feel a ton of extremely hot air coming from the fan, the engine bay is ridiculously hot. I have several cars and none of them are this bad.
On the road it runs 189 degrees, not a problem at all. When I have it Idled for a period of time, I’ve seen in climb to 230+ Along with the transmission temp climbing to 220. Today the AC compressor was cycling off, I assume the head pressure was too high, even at 1200 rpm it would not cool itself down much until you get on the road.
The ignition timing at idle is around 22-24 degrees which seems very low to me. For the most part it runs good, I have an intermittent random misfire I’ve been chasing recently but I believe that’s unrelated since I’ve had this issue for a while.
The AC doesn’t cool the best, on a hot day It will not keep up at all. I had the grill off a while back and made sure everything was clean and clear of any airflow obstruction.
Could the condenser be bad internally causing this buildup of heat?
I have no clue what to do next, any help would be greatly appreciated.
Thanks