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Truck shut off while driving, timing chain broke

Tiny
NICKOLA1
  • MEMBER
  • 2012 GMC SIERRA
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 98,000 MILES
Truck shut off while driving. Mechanic said the timing chain snapped. Is this engine an interference or non interference engine? Trying to decide if it's worth fixing. Could there be other damage from when it snapped?
Tuesday, January 8th, 2019 AT 9:44 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

Although it does not show to be an interference engine, the engine running when it failed could cause damage to the valve train.

I would set the new chain and gears on and then before going anywhere else, do a compression test to verify no valve damage.

https://www.2carpros.com/articles/how-to-test-engine-compression

Roy
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Tuesday, January 8th, 2019 AT 9:56 AM
Tiny
NICKOLA1
  • MEMBER
  • 3 POSTS
Do you know if it's an interference or non interference? I can't find anything online and the dealership doesn't know. I plan on getting rid of it soon, don't want to get into big money if there's more damage.
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Tuesday, January 8th, 2019 AT 10:06 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
As I stated in my original post, it is not an interference engine. However, under certain conditions such as engine running under power, it can do valve damage at the time it breaks.

Roy
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Tuesday, January 8th, 2019 AT 10:37 AM
Tiny
NICKOLA1
  • MEMBER
  • 3 POSTS
Thanks, I didn't see the first part of your post.
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Tuesday, January 8th, 2019 AT 10:39 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

No worries.

Always glad to help.

Roy
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Tuesday, January 8th, 2019 AT 10:41 AM

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