"Low Engine Oil Pressure" Do I really need a new engine?

10

Asked by May 06, 2016 at 05:51 PM about the 2000 Jeep Cherokee 4 Dr Sport 4WD

Question type: Maintenance & Repair

So i took my Jeep into the shop today to get it looked over because my oil
pressure drops really low when i have it in idle. (which i know is normal but it
was really low so i got it looked at) The mechanic basically told me ill need a
new engine "soon, or it could last me 10 years". it hasnt started knocking yet
and i dont want to have to buy a new engine. Suggestions?

12 Answers

113,945

Low oil pressure, if it isn't the oil pump, is usually caused by worn engine bearings, you can try using a heavier weight oil as the outside temps rise but this is only treating a symptom not the real problem.

3 people found this helpful.
64,415

What tennisshoes said.

10

I'm just baffled a little by how the only fix is to get an entire new engine

1 people found this helpful.
113,945

You don't have too, you can have yours rebuilt, but you won't get the warranty that you would if you had it replaced.

10

Would that be cheaper than replacing the whole thing?

113,945

There in lies the rub, usually it does not, cause there is more labor involved and your rig is down a lot longer, then of course there is always the unforeseen complication that comes along and really set it all back, like a pin hole in the block or it needs line bored, something. That's why most places just replace the unit anymore, that way you and the installer are covered if something happens to the replacement within the warranty period, in the long run it is actually cheaper to replace the engine if your having to done at a shop.

1 people found this helpful.
Best Answer Mark helpful
10

Thanks a lot, you've given me some comfort in my engine problems

113,945

As it isn't knocking yet, I would run like a racing oil in it say a 20/50 during the summer and drop back to a 10/40 or a 10/30 if that is too heavy for winter and give it time to warm up when it is cold. Or you could use power punch oil additive during each oil change, you need to try and keep the pressures up so the top end of the engine gets lube, the lifters will start clicking when they loose oil pressure, so be aware of that. HTH

Try a high volume oil pump first

10

you can test your oil pump.remove it and test it for wear

1 people found this helpful.
20

If you want to budget fix it, you can replace the rod bearings and oil pump. I inspected my main bearings and they all still had the white coating on them. But the rod bearings were shot. I had zero oil pressure at idle when hot. I first just replaced the rod bearings but it still had low pressure so I went back in and installed a stock pressure Melling oil pump. Now it idles at 25lbs hot idle and 42lbs highway. If you your crank journals are in good shape you can put new bearings in. Might as well replace the rear main seal while you’re in there, regardless if it’s leaking or not. Replace it. When you replace the bearings YOU HAVE TO BREAKE THEM IN...... Just like if it was a new engine. People that do this and trash the new bearings are driving their Jeep/car like before they put the new bearings in and ruin them. You need at least 500 miles on the new bearings before you horse beat it. I’ve done this on 3-4 cars in my life and all were fine with no issues. My 1990 XJ 4.0 has new rod bearings, seals and gaskets and runs great. Not a drip and I now have 5000 miles on the bearings at 25 hot idle and 42lbs driving. If it doesn’t smoke and the journals look good it can be done. Less than $100 and some elbow grease and you will be good to go.

2 people found this helpful.
20

If you want to budget fix it, you can replace the rod bearings and oil pump. I inspected my main bearings and they all still had the white coating on them. But the rod bearings were shot. I had zero oil pressure at idle when hot. I first just replaced the rod bearings but it still had low pressure so I went back in and installed a stock pressure Melling oil pump. Now it idles at 25lbs hot idle and 42lbs highway. If you your crank journals are in good shape you can put new bearings in. Might as well replace the rear main seal while you’re in there, regardless if it’s leaking or not. Replace it. When you replace the bearings YOU HAVE TO BREAKE THEM IN...... Just like if it was a new engine. People that do this and trash the new bearings are driving their Jeep/car like before they put the new bearings in and ruin them. You need at least 500 miles on the new bearings before you horse beat it. I’ve done this on 3-4 cars in my life and all were fine with no issues. My 1990 XJ 4.0 has new rod bearings, seals and gaskets and runs great. Not a drip and I now have 5000 miles on the bearings at 25 hot idle and 42lbs driving. If it doesn’t smoke and the journals look good it can be done. Less than $100 and some elbow grease and you will be good to go. My Jeep XJ 4.0 has over 200,000 miles on it.

Your Answer

Cherokee

Looking for a Used Cherokee in your area?

CarGurus has 68,360 nationwide Cherokee listings starting at $2,795.

ZIP:

Jeep Cherokee Experts

  • #1
    swtcat13
    Reputation
    1,950
  • #2
    Daniel Guillen-Pizzorni
    Reputation
    1,750
  • #3
    Luis660399
    Reputation
    1,600
View All

Related Models For Sale

Used Jeep Grand Cherokee
801 Great Deals out of 75,881 listings starting at $899
Used Jeep Wrangler
252 Great Deals out of 18,600 listings starting at $1,950
Used Toyota 4Runner
251 Great Deals out of 33,481 listings starting at $2,900
Used Ford Escape
971 Great Deals out of 109,446 listings starting at $1,000
Used Ford Explorer
813 Great Deals out of 65,252 listings starting at $700
Used Honda CR-V
491 Great Deals out of 73,686 listings starting at $1,494
Used Toyota RAV4
424 Great Deals out of 75,705 listings starting at $1,500
Used Ford F-150
2,334 Great Deals out of 215,121 listings starting at $1,300

Used Cars For Sale

2019 Jeep Cherokee For Sale
38,039 listings starting at $18,100
2018 Jeep Cherokee For Sale
9 Great Deals out of 13,332 listings starting at $16,090
2017 Jeep Cherokee For Sale
54 Great Deals out of 3,494 listings starting at $13,488
2016 Jeep Cherokee For Sale
80 Great Deals out of 4,409 listings starting at $12,425
2015 Jeep Cherokee For Sale
121 Great Deals out of 6,045 listings starting at $9,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.