Ok... so I have fixed many of the issues (or have had friends and mechs fix) on my lil YJ. I took her out for five days this weekend up to the mountains in Nevada about 100 miles North East of Bishop off highway 6. I was with a group of other Jeeps so I have some reference. The issue... she runs hot when climbing. The higher the elevation. The hotter she gets. I run 91 octane fuel all the time and when the engine gets hot she starts to ping. To avoid the pinging I ease off the throttle and slow down... long story short she was running pretty much all five days in the red or just below the red on highway climbs from 4000 to 8000 feet in elevation. Heck she started getting hot climbing the 405 leaving LA.
Here is what I have done to her cooling system:
1. New Griffin high flow radiator
2. 5 month old high flow water pump
3. New (Friday 160 thermostat)
4. New temp sending unit to the computer and to the gauge
5. Flushed entire system three months ago, Wednesday and again Thursday
6. Added Royal purple "ice" that is supposed to lower the temp by 20 degrees
7. Fan clutch is a year old and seems to be working fine (fan is pulling)
8. I have a small pusher fan in front of the radiator that also seems to be working fine (pushing)
Some things I have noticed is that the coolant becomes a rust color very quickly and there were some chunks of rust sitting on top of the tubes that flow the coolant when you look in the filler of the radiator. The head is about six months old. Engine is about 1.5 years old and has about 5,000 miles on it.
i have a stroker... and strokers are known for running hot. However I should be able to keep up with traffic, not have pinging and not have to run my heater when it is 100 degrees outside. when I drop back down to sea level (I live by the beach) the power comes back and she runs cooler since I am not climbing.
Any thoughts or ideas are appreciated. my YJ is a 94 with OBD 1.
Brett
Here is what I have done to her cooling system:
1. New Griffin high flow radiator
2. 5 month old high flow water pump
3. New (Friday 160 thermostat)
4. New temp sending unit to the computer and to the gauge
5. Flushed entire system three months ago, Wednesday and again Thursday
6. Added Royal purple "ice" that is supposed to lower the temp by 20 degrees
7. Fan clutch is a year old and seems to be working fine (fan is pulling)
8. I have a small pusher fan in front of the radiator that also seems to be working fine (pushing)
Some things I have noticed is that the coolant becomes a rust color very quickly and there were some chunks of rust sitting on top of the tubes that flow the coolant when you look in the filler of the radiator. The head is about six months old. Engine is about 1.5 years old and has about 5,000 miles on it.
i have a stroker... and strokers are known for running hot. However I should be able to keep up with traffic, not have pinging and not have to run my heater when it is 100 degrees outside. when I drop back down to sea level (I live by the beach) the power comes back and she runs cooler since I am not climbing.
Any thoughts or ideas are appreciated. my YJ is a 94 with OBD 1.
Brett
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