Hey all,
Got my O2 sensor replace and my B2 is runnin fine except now she tends to go towards the hot side tempwise after driving for an extended period. I have flushed the system and have a 'new' thermostat in....it's about 8 months old. New gearing(4.56's) and tires(33's). Anyone out there that can clue me in to this problem? Temp is fine at highway speeds...just gets warm/hot in stop and go situations and after being off road for a while.

Thanks

 

What temp thermostat did you use as a replacement? IIRC there was asomething said about these engines likeing a 180* thermostat. I could be way off on this but it seems like I read it on here some where.

 

You may have a number of things going on. First would be a possible dirty or faulty temp sensor (I mean, does it 'overheat' and steam off?). Another issue you may have is airflow, meaning the fan clutch could be going or there is blockage preventing good airflow through the radiator core. Sometimes, though it is normal for it to run a little warmer than usual in off-road and stop-and-go traffic situations, but if it is boiling over, then there is some serious problems. I wouldn't necessarily suspect the water pump, but that is also a possibility. Hope this helps narrow it down some.

EDIT: I just read the post prior to mine. This could also be a factor, having the 'wrong' thermostat installed. I think the stock one is 192 degrees, but there are also 180 and 160 degree thermostats available. The problem with 'cooler' thermostats is if you don't have the system capacity or the right radiator, you're going to end up running either too cold or way too hot.

 

If you have the 2.9 those things are known for cracked heads. But that likely isn't the problem.

 

Might be the clutch fan, though what did you do to fit the 33s, do a body lift?

 

Also, do you have a fan shroud? It is almost certainly an airflow problem from what you said.

 

Guess I need to get a shroud. To fit 33's I got a 4" sus lift and 3" body lift but have had those on my B2 for a while

 

you didn't mention if you had auto or man trans, an auto may not like the 33s, and a slipping torque converter could be introducing extra heat into the trans/radiator heat exchanger.

 

> Guess I need to get a shroud.

Yes, I thought you probably skipped it with a body lift.

If this just started (as in it was fine last summer with 33s) I would still would suspect a fan clutch first. Make sure your coolant is a 50/50 mix with a tester.