jeep hates hot weather......

[76k5grrl]

2001 2.5 136k. 5 sp manual. Engine and drivetrain well maintained.


This thing, in the past few years, has started to really hate warm weather. Runs like a top in 60 and below, but when it gets hot, the oil pressure alarm screams at me when I turn it on after driving for a while- like say I take it somewhere- 20-30 min regular driving. Stop for a short errand. Turn it on to continue, oil pressure gauge takes a few seconds to get to normal and the warning light beeps at me. It only takes maybe 7-8 seconds to reach "normal".

I think I know why, but I would like some affirmation from you guys.

Should I change viscosity for the summer? I don't drive it very often when it's warm.

 

[POORBOYK5]

Looks like you'll have to move to Alaska!! I would start with a oil pressure sender. Cheap and east to rule out. Throw a coolant temp sensor at it too. Makes a world of difference how they run. Other than that, It could be the oil pump or too loose tolerances

 

[1BEATK5]

Oil pressure senders are junk in those.

Replace the sender.
clean out the electrical connector with brake clean. It will be full of oil.

If its a green colored connector. It's a 2 wire connector with only 1 wire. Remove the white plastic plug from the unused terminal hole.


What weight oil is in it?

 

[AJMBLAZER]

Check the sensors.

Run whatever weight oil the factory recommends for your climate. I'm not a fan of changing viscousities for seasons.
If it doesn't leak or seep try sunthetic.

 

[76k5grrl]

I've always used 10/30 no matter what the season. But it's old now....

Hot weather affects the sensors and sending unit? I was inclined to believe that it was more likely excessive engine wear and loose tolerances. I would prefer these other answers

 

[AJMBLAZER]

Not really the hot weather but the sensors are probably ****ed and giving erronious readings.

 

[lectric80]

I've always used 10/30 no matter what the season. But it's old now....

Hot weather affects the sensors and sending unit? I was inclined to believe that it was more likely excessive engine wear and loose tolerances. I would prefer these other answers

My Durango with a 4.7 V8 only throws the warning light on the oil when it's cold. Anything below 40 and the light will start flashing, sometimes off and on and other times it will come on and stay on. It is the oil pressure sending unit, and the only cause is temps, so it is very likely your issue here. Something about Chrysler sending units, I have heard of a lot of them.