Where to start on likely seized motor

10

Asked by D Sep 08, 2021 at 07:32 PM about the 1999 GMC Yukon Denali 4WD

Question type: Maintenance & Repair

Driving home from work, oil pressure gauge went down,
pulled over with in 50 ft, turned it off. I then discovered oil
cooler line popped at factory crimp, oil all over the place,
got it towed home. A few days later went to check it out,
would not turn over, put breaker bar on crank, no rotation..
where should I start. Thinkn either crank bearing seized,
piston to head seized or both. What say you?

3 Answers
155,245

james answered 2 years ago

Remove all the spark plugs. Then try to turn the engine by hand. If you can then turn the engine, it's not seized. With the spark plugs out of the engine there's no compression so the engine should turn freely. You can also remove the serpentine belt or belts to be sure that none of the accessories, like the alternator, air conditioning compressor, etc. are not seized and creating resistance as you turn the engine by hand. Hope that helps! Jim

1 people found this helpful.
Mark helpful
10

D answered 2 years ago

Valid point. Thanks for the opinion, ill give it a try tomorrow night and see what happens.. I'm thinkn on trying that first, if nothing I'm gonna pull the oil pan and see what I find down there i.e bearings spun, broke connecting rod, maybe even which piston if any is stuck.. Thanks again Jim

1 people found this helpful.
Mark helpful

Your Answer:

Related Questions

Yukon

Looking for a Used Yukon in your area?

CarGurus has 919 nationwide Yukon listings starting at $5,890.

Postal Code:

Shortcuts

Search GMC Yukon Questions

CarGurus Experts

  • #1
    MikeDaGeek
    Reputation
    9,640
  • #2
    clayduster71
    Reputation
    5,170
  • #3
    David Boccabello
    Reputation
    4,000
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Tahoe
10 Great Deals out of 763 listings starting at $7,499
Used Cadillac Escalade
11 Great Deals out of 463 listings starting at $4,995
Used GMC Yukon XL
10 Great Deals out of 690 listings starting at $9,999
Used Chevrolet Suburban
4 Great Deals out of 525 listings starting at $8,000
Used GMC Sierra 1500
140 Great Deals out of 7,834 listings starting at $5,500
Used Ford Expedition
17 Great Deals out of 648 listings starting at $7,894
Used Chevrolet Silverado 1500
170 Great Deals out of 7,481 listings starting at $6,995
Used Ford F-150
315 Great Deals out of 13,484 listings starting at $4,888
Used Lincoln Navigator
8 Great Deals out of 296 listings starting at $16,990
Used Toyota 4Runner
21 Great Deals out of 542 listings starting at $8,960
Used Jeep Grand Cherokee
138 Great Deals out of 3,611 listings starting at $4,295
Used Dodge Durango
62 Great Deals out of 1,820 listings starting at $6,987

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. Content will be removed if CarGurus becomes aware that it violates our policies.