BeijingJeep
NAXJA Forum User
- Location
- Utah
Hello all,
First, thank you for your time to read this, my first post here!
I have a 99 Sport 4.0 5 spd 4X4. Lately I am having high oil pressure problem. Before the problem occurred, it idles at 30-35 psi and runs at 45-50 psi. I took it to a trusted mechanic to do an oil change, because of the cold temperature I decided to use 5W30 instead the 10W40. Two days after the change, I noticed the oil pressure change. It idled at 50 psi, ran around 55 psi (1500 rpm). Two days after that it maxed out to 80 psi when running (1600-2000 rpm). I managed to get it to work 40 mph in 5th gear, 55 psi at 1100 rpm, turned off the engine, let it sat for couple of hours. Restarted it, idled at 50 psi, ran around 55 psi, never max out again.
I took it back to my mechanic, hooked with to a mechanic gauge, verified my gauge reading was accurate. When we revved up the engine, the oil pressure increased dramatically, but it went down right after we released the throttle. We added sea foam into the engine, with in seconds everything was back to normal. Idled at 30-35, run at 45-50. We then drained the oil/sea foam, replaced the oil with 5W30, a new oil filter, and a new oil pressure sending unit. Restarted the engine, immediately it idled at 50 psi again. Two days later the maxed out at 80 psi.
Last weekend I took it to my local Jeep Dealership, they replaced the oil with 10W40 and the filter again. It idled at 50 psi, ran around 55 psi for the first 2 days. Today on my way to work, again it maxed out at 80 psi (2000 rpm).
Please advice.
Best,
First, thank you for your time to read this, my first post here!
I have a 99 Sport 4.0 5 spd 4X4. Lately I am having high oil pressure problem. Before the problem occurred, it idles at 30-35 psi and runs at 45-50 psi. I took it to a trusted mechanic to do an oil change, because of the cold temperature I decided to use 5W30 instead the 10W40. Two days after the change, I noticed the oil pressure change. It idled at 50 psi, ran around 55 psi (1500 rpm). Two days after that it maxed out to 80 psi when running (1600-2000 rpm). I managed to get it to work 40 mph in 5th gear, 55 psi at 1100 rpm, turned off the engine, let it sat for couple of hours. Restarted it, idled at 50 psi, ran around 55 psi, never max out again.
I took it back to my mechanic, hooked with to a mechanic gauge, verified my gauge reading was accurate. When we revved up the engine, the oil pressure increased dramatically, but it went down right after we released the throttle. We added sea foam into the engine, with in seconds everything was back to normal. Idled at 30-35, run at 45-50. We then drained the oil/sea foam, replaced the oil with 5W30, a new oil filter, and a new oil pressure sending unit. Restarted the engine, immediately it idled at 50 psi again. Two days later the maxed out at 80 psi.
Last weekend I took it to my local Jeep Dealership, they replaced the oil with 10W40 and the filter again. It idled at 50 psi, ran around 55 psi for the first 2 days. Today on my way to work, again it maxed out at 80 psi (2000 rpm).
Please advice.
Best,
