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Old 01-22-2019, 01:53 PM   #15
Crusin
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Yes 200 is a lot, looks to be 5 mm. Maybe you can find a replacement crank out there. Keep us updated. Good luck hope you hear some good news.
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Old 01-22-2019, 07:29 PM   #16
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Just stumbled upon these. The traverse was running the LLT. Can anyone confirm if the crankshaft is the same?

https://www.rockauto.com/en/catalog/...rankshaft,5292

*Edit* apparently they have ones for the LFX out of the Impala. I'm just have no experience with this folks or a refurbed crank
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Old 01-22-2019, 07:52 PM   #17
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That year is probably the LLT which probably uses the same crank.
Check this out: http://gmauthority.com/blog/gm/gm-engines/lfx/
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Old 01-22-2019, 07:55 PM   #18
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Wouldn't that be sweet. Here is the suppliers web site with a phone number. You could call and see what they say. http://www.crankshaftsupply.com/
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Old 02-16-2019, 08:39 PM   #19
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I just went ahead and ordered one of those refurbished cranks. I'll let you all know what it looks like when it shows up.
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Old 02-17-2019, 09:46 AM   #20
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Since you've got it apart could you post on back on the timing chain condition vs mileage of the motor?

The Camaro and Impala 3.6 got the upgraded chains in '12 (but not the Traverse thru '15, way to go GM) but its been a source of concern for me. Are the screens showing any debris/sludge? I believe they are the only way to lube the chains and between those blocking off along with potentially too thin an oil in hot weather the failure rate seems to go up.
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Old 02-20-2019, 06:54 AM   #21
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Quote:
Originally Posted by V6Vega View Post
I just went ahead and ordered one of those refurbished cranks. I'll let you all know what it looks like when it shows up.
Did your crank arrive?
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Old 02-22-2019, 01:30 AM   #22
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You can't get new cranks for these engines? WTF?
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Old 02-23-2019, 04:31 PM   #23
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xstuntman I didn't see anything to suggest that the timing chain had any issues with oiling or wear. Whoever blew up the motor, had changed the oil at least once, and probably used some additives in a vain attempt to make the "tick" of a spun bearing go away. So I probably wouldnt have found any sludge that would have been a good indicator. Since I have the engine apart, and it likely had oiling issues with that spun bearing, I will be replacing the timing chain regardless.

The crank has arrived. Showed up in a box, packed with expanding foam. Came with a set of oversize king bearings for crank and rod journals. Says it was ground .10 undersized, and according to my cheap calipers, that's correct.





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Old 02-23-2019, 10:26 PM   #24
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Cool, and great it came with the correct bearings.

Yeah, the timing chain in the LFX engine is suppose to be good for 200,000 miles. I don't know if I'd trust that, but it does not show any necessary maintenance for it.
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