That or the timing chain broke, I suppose...
CK5
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Help! 2004 Yukon, big bang on 3-4 shift and sudden engine death
- Thread starter jonrpick
- Start date
That or the timing chain broke, I suppose...
I edited my message while you were answering me, I realized you said none move so the whole cam is not moving
Yeah, I was about to clarify that myself. LOL
Being that this is an interference engine, I'm not too happy about this.
As Dave mentioned, turn the crank over by hand if possible. Could even be a broken crank, which may be the loud “bang” you heard. If it broke it could still turn some at the starter, but not at the front where the timing set is.
Yikes. You are right though. Problem is, I'm very limited on hand tools. Most of my stuff is in another state in storage. So I'm going to have to have it hauled a couple hours away. I have a cousin who has a yard full of LS parts so something could definitely be cobbled together.
The question I have to answer is, how much am I willing to put into it. I can get a whole running Suburban or Yukon for a few thousand.
5.3's are cheap and so are gmt800 's.
If the crank is broken, it must be closer to the front than the back, or the starter would be noticeably faster. Although, I've seen an engine run with a broken crank and the noise is not pretty.
If the timing chain snapped as the original problem, I think the transmission would stay in gear and keep the engine turning as you slowed down.
If the timing chain snapped as the original problem, I think the transmission would stay in gear and keep the engine turning as you slowed down.
Well I think a simple chain check should narrow it down quickly.
Actually, thinking back, the RPMs did drop with speed as I pulled it off to the side of the interstate. I was still in "WTF mode" and not paying super close attention, but now that I think back, I remember.
That's next, though I'm down to whatever tools are in the Yukon now.
Can the cam sensor be pulled and see the chain?
