could my oil pump be going bad

Asked by Aug 04, 2015 at 08:50 AM about the 2004 Chevrolet Suburban 1500

Question type: Maintenance & Repair

I had the oil changed and drove about 400 miles and the pressure starts to drop and engine nocks , but I can kill it and start it back and drive maybe 30 miles if that before it drops again

3 Answers

69,655

Have you checked the oil level?

3,495

Low oil pressure. A bad oil pump will lose the ability to properly pump oil through your system. This will result in low oil pressure that could lead to further vehicle damage. Increased engine operating temperature. Oil reduces the friction on the parts in your vehicle, which in turn keeps temperatures regulated while the vehicle is in operation. When the flow of engine oil is reduced, the parts don't remain properly lubricated and thus heat up. Increased friction leads to increased temperatures and possibly more problems down the road. Noise. Your vehicles hydraulic lifters are an important part of your engine's operation and it is important that they are adequately lubricated. When your engine is working properly these lifters are virtually silent, but when the flow of oil is cut off to the lifters they begin to make noise and wear unevenly. It is extremely expensive to have lifters replaced and extremely important they are properly lubricated. In addition to the hydraulic lifters, your valve train may begin to make noise if your oil pump begins to fail. This includes the pushrods, the seals, and valve guides. All of these parts need to be properly lubricated as well. A bad oil pump can result in a lot of additional noise from your valve train system. Lastly, your oil pump may begin to make noise if it isn't working properly. This is a less common problem than some of the others presented here. If your oil pump begins to make noise it will be a loud whining or whirring sound. This is a result of the internal gear mechanism wearing down. As it begins to fail, your oil pump could make a bit of noise. It is unlikely that most drivers will ever experience an oil pump failure, but if you experience any of these symptoms, you may need to have your vehicle checked. It is always best to repair parts as soon as you experience a problem as extended wear could lead to a reduction in your engine life.

1 of 1 people found this helpful.
65,975

If you have too much oil in the engine it will foam and cause the oil pressure to drop. This is because the oil pump is sucking air (foam) instead of oil. Also, an overheating engine can cause the pressure to drop. HTH. -Jim

Your Answer

Add photo

Related Questions

Suburban

Looking for a Used Suburban in your area?

CarGurus has 19,720 nationwide Suburban listings starting at $2,000.

ZIP:

Search Chevrolet Suburban Questions

Chevrolet Suburban Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 960
#2 Eric Fritz
Eric Fritz
Reputation 870
#3 Neal Turner
Neal Turner
Reputation 840
View All

Related Models For Sale

Used GMC Yukon XL
237 Great Deals out of 12,302 listings starting at $2,950
Used Chevrolet Tahoe
548 Great Deals out of 29,234 listings starting at $1,699
Used GMC Yukon
374 Great Deals out of 18,226 listings starting at $2,950
Used Ford Expedition
473 Great Deals out of 24,887 listings starting at $700
Used Cadillac Escalade ESV
99 Great Deals out of 5,787 listings starting at $3,500
Used Chevrolet Silverado 1500
1,718 Great Deals out of 175,749 listings starting at $1,250
Used Cadillac Escalade
239 Great Deals out of 11,197 listings starting at $2,495
Used Chevrolet Silverado 2500HD
307 Great Deals out of 27,740 listings starting at $1,250
Used Toyota Sequoia
154 Great Deals out of 5,651 listings starting at $2,700
Used Lincoln Navigator
118 Great Deals out of 5,791 listings starting at $1,900
Used Ford F-150
2,191 Great Deals out of 206,316 listings starting at $1,499
Used Nissan Armada
144 Great Deals out of 8,778 listings starting at $3,499
Used Ford Excursion
11 Great Deals out of 799 listings starting at $3,995
Used Dodge Durango
274 Great Deals out of 22,704 listings starting at $1,200

Used Cars For Sale

2017 Chevrolet Suburban For Sale
10 Great Deals out of 9,346 listings starting at $39,491
2016 Chevrolet Suburban For Sale
21 Great Deals out of 1,848 listings starting at $36,899
2015 Chevrolet Suburban For Sale
16 Great Deals out of 1,126 listings starting at $29,000
2014 Chevrolet Suburban For Sale
19 Great Deals out of 513 listings starting at $19,900
2013 Chevrolet Suburban For Sale
33 Great Deals out of 664 listings starting at $14,000

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.