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
157,615

James answered 3 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 3 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 929 nationwide Yukon listings starting at $1,225.

Postal Code:

Shortcuts

Search GMC Yukon Questions

CarGurus Experts

  • #1
    MikeDaGeek
    Reputation
    9,650
  • #2
    clayduster71
    Reputation
    5,220
  • #3
    David Boccabello
    Reputation
    4,030
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Tahoe
24 Great Deals out of 911 listings starting at $11,900
Used Cadillac Escalade
21 Great Deals out of 376 listings starting at $6,900
Used GMC Yukon XL
14 Great Deals out of 683 listings starting at $13,950
Used GMC Sierra 1500
148 Great Deals out of 7,258 listings starting at $3,950
Used Chevrolet Suburban
10 Great Deals out of 550 listings starting at $7,500
Used Ford Expedition
23 Great Deals out of 821 listings starting at $7,888
Used Chevrolet Silverado 1500
202 Great Deals out of 5,975 listings starting at $2,975
Used Ford F-150
321 Great Deals out of 14,968 listings starting at $1,712
Used Lincoln Navigator
10 Great Deals out of 172 listings starting at $9,869
Used Toyota 4Runner
10 Great Deals out of 304 listings starting at $9,700
Used Dodge Durango
46 Great Deals out of 2,266 listings starting at $5,500

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.