cgrossl

I put the mechanical gauge on earlier today, and it confirmed what the factory gauge was reading. Looks like I'll be replacing the oil pump tomorrow.

AFMan

I thought the mechanical guage tests the pump, not the guage??

AFMan

Disregard. I just reread your post. So, you had a low indication just as what your factory guage is showing. Yep, that's your oil pump. Mine read normal, but I'm still getting the low indication.

My next step, will be to buy an after market oil pressure sensor, since the indication in my instrument panel is not reading accurate.

cgrossl

I got the pump replaced, and everything buttoned back up earlier today. I ended up replacing the steering stabilizer, and the track bar while I was in there.

I thought at first that the problem was fixed, but the more I ran it, the more and more the oil pressure dropped. Its a little better, I am now getting 10-12 psi at idle and about 25psi at 2000 RPM. I did pull the #1 rod cap to take a look at the bearings, but they looked fantastic.

Something's going on, but I'm not sure what. I think I will try some heavier weight oil, but I think I'm just going to drive it and deal with whatever happens, when it happens. Who knows, it may just keep going and going.

UserID6095

Try Lucas Oil stabilizer, it will help up the pressure. I would not go above a 10w40 for an oil, but thats just me. Too thick will cause excessive heat and cylinder wear. Have you performed a compression test (more curious then anything)?

driven

I had the same problem with mine. After the Jeep would get hot the oil pressure would hold around 8-10psi then the gauge would just drop off to 0. I never did get around to hooking up a mechanical gauge since I had recently replaced my sending unit.

I had my friend who's a great mechanic replace my oil pump this week, surprisingly he for some reason had to unbolt the transmission and move it back a little bit to replace the oil pump. Since he had to do that he unbolted the transfer case cross member and loosened up the drive shaft a little bit to make it all work.

The oil pump seemed to do the trick except that once it gets hot it seems to sit right around 11psi or a little higher most of the time. I guess that's good enough, I am more then happy as long the pressure doesn't drop to 0 anymore and give me the idiot light.

I am running 10w30 oil and so far so good, once I get some more mileage on this new pump I am curious to see if it will hold. I hope I didn't make a mistake by not just going with a high volume pump instead of a standard replacement. I think I should be fine based upon what little time I've had to drive around with it lately.

cgrossl

I started to go with a high volume pump as well, but I never was much of a fan of them for most applications. For me, I think it would have just been a bandaid fix for another problem. But, I would have got a warm fuzzy when I looked down at the oil pressure gauge. I talked to a couple other former Jeep owners here at work, and they also reported similar oil pressure readings. Plus like I said, the rod bearings that I looked at looked great. There was very little wear.

hubs97xj

I would be seriously concerned about those kinds of oil pressures. Those are not normal. Minimum at idle is 13, and roughly 10 psi per 1000 RPMs above that.

TheGreatGazoo

I put the high volume pump in mine a few days ago and put about 200 miles on the XJ since and my oil pressure still is great. i dont understand why people are on the fence about High volume pumps. I am a MOPAR guy and built over 20 engines 440's 383's 360's 340's and one or two slant six's and always spent the extra 20-30 bucks on a MOPAR high volume pump. your oil system is the most important part to keep your engine well lubricated it is like your heart keeping the blood flowing. keep in mind a high volume pump is just that. It will not Increase pressure above recomended specs. it is even more important on high mileage engines where bearing tolerances increase due to normal high mileage ware and you need more volume to take up for that normal ware on a used engine. on a freshly rebuilt engine where tolerances are tight less oil leakage around the bearings keeps the oil pressure up so a stock pump would be ok. but still that high volume is a good idea for the future to keep that oil flowing and keep the pressure up. a few people would say it causes leaks but that is BS and dont listen to them. there is no place where oil pressure is held back by a gasket except the oil pump and oil filter or adapter where it will not leak unless it was not torque'd down properly. so to say " i'd rather stay away from high volume pumps is a mistake in my opinion" 20 years experance and never had a problem yet. your engine IS definatly worth the extra bucks on this up grade. cut back ans save $$ on the chrome oil pan, chrome valve cover, ECT and protect your engine the extra bucks on the pump will extend the life of your engine. i think that's what we all want. lets get all those XJ's to hit 300,000 miles. (better lubrication+good grade oil= less friction and more miles).

Ja-Seen

Hey guys. I just bought a `97 G Cherokee Limited with a V8 in her. I had the same problems with the oil pump, where she had pressure when cold, then it goes to zero when warm. So I changed it. However, now I am not getting any oil pressure at all according to the gauge. She maintains good temp & all. Any ideas??

RoyalXJ

check with a mechanical gauge

Ja-Seen

I'll give that a try. Thnx

Roni

Who makes a good hi volume oil pump?

Roni

Is part # DCC-4529241 a MOPAR part number?

captainwoot

x2, chrome don't get you home!