I have a 2002 Grand Cherokee that has a couple interesting quirks that just started up (86000 miles).
1-on first startup in the morning, after the engines warms up the oil pressure guage will drop very low at stop lights. After sitting all day at work, this does NOT happen again-only in the morning.
2-coolant seems to overflow constantly lately with a need to refill every few days. This just began happening and is getting old fast.
3-anybody want to buy a jeep?
“anybody want to buy a jeep?”
No thanks, I already have one, and that’s one too many.
Before you do anything else, try replacing the radiator cap and see if that cures the coolant issue. I don’t know what’s going on with the oil pressure.