New to the site, looking for answers...

[ChevyGMCissues]

We bought this 2011 Yukon about a year and a half ago with 73,000 miles. Wife's everyday driver racked up the miles to 120,000 in about a year and a half. Then we had oil leaking somewhere from under the hood, traced it back to a loose oil filter. Fixed it we thought, then leaked some more. Changed the oil filter a couple times because of it. Now about 3 weeks ago the wife was bringing the kids to daycare and had to turn around and bring it home. She thought we were low on oil again, checked the oil after work, sure enough quart low. Then I start it. It runs for like 10 seconds and I thought I was in the clear. Now we brought it to a local mechanic and he said the motor is locked up. I was just wondering if we misdiagnosed this or if this ever happened to anybody on here. Please let me know what you guys think. Thanks in advance.

 

[swathdiver]

Did you drive it to the mechanic? If so, I question if and or how it locked up! I wonder if your adapter is leaking or if you have K5L, the oil cooler lines are leaking near the filter or somewhere else?

 

[smccollamjr]

I would guess oil cooler lines. They are near the filter and notorious for leaking. If you drove it to the mechanic and it wasn't making crazy loud noises, I'd find a new mechanic.

 

[Meccanoble]

I would roll up with a gallon of oil, add and drive off. If it starts, mechanic a liar and you should leave.

 

[HiHoeSilver]

I would roll up with a gallon of oil, add and drive off. If it starts, mechanic a liar and you should leave.

Why waste all that oil if it is locked up. How about just turn the damn over with a wrench...

 

[David Smith]

We bought this 2011 Yukon about a year and a half ago with 73,000 miles. Wife's everyday driver racked up the miles to 120,000 in about a year and a half. Then we had oil leaking somewhere from under the hood, traced it back to a loose oil filter. Fixed it we thought, then leaked some more. Changed the oil filter a couple times because of it. Now about 3 weeks ago the wife was bringing the kids to daycare and had to turn around and bring it home. She thought we were low on oil again, checked the oil after work, sure enough quart low. Then I start it. It runs for like 10 seconds and I thought I was in the clear. Now we brought it to a local mechanic and he said the motor is locked up. I was just wondering if we misdiagnosed this or if this ever happened to anybody on here. Please let me know what you guys think. Thanks in advance.

What happened between it running for 10 seconds and your mechanic diagnosing the problem? Did you drive it to the shop? After it ran for 10 seconds, did it die by itself? Will it turn over?

 

[ChevyGMCissues]

What happened between it running for 10 seconds and your mechanic diagnosing the problem? Did you drive it to the shop? After it ran for 10 seconds, did it die by itself? Will it turn over?

The Yukon never ran just started for 10 seconds , died out, then got towed to the mechanic.

 

[David Smith]

The Yukon never ran just started for 10 seconds , died out, then got towed to the mechanic.

Started as in the motor just turned over? After it died out would it not turn over anymore?

 

[ChevyGMCissues]

Started as in the motor just turned over? After it died out would it not turn over anymore?

Did not even turn over like a dead battery or a starter was out

 

[Ex Euro Driver]

How can you diagnose a "locked up" motor without at least taking a few things apart? That seems a bit extreme to me.

 

[ChevyGMCissues]

How can you diagnose a "locked up" motor without at least taking a few things apart? That seems a bit extreme to me.

Kind of what I was thinking... got a few ideas to check on. First, I'm going to check the alternator to see if it is seized up. A guy told me that if a bearing was to seize on this motor that we would never be able to turn the motor. Would seem to be locked up. Taking the belt off tomorrow and hoping that will let me know for sure .

 

[RED TAHOE LS]

Time for a second opinion.
David g...........

 

[PWMac]

Kind of what I was thinking... got a few ideas to check on. First, I'm going to check the alternator to see if it is seized up. A guy told me that if a bearing was to seize on this motor that we would never be able to turn the motor. Would seem to be locked up. Taking the belt off tomorrow and hoping that will let me know for sure .

Did you have any luck starting with the belt off?

 

[retiredsparky]

A broken crank mounted vibration dampener can also lock up the engine.