Scotty, a mistakenly long bolt as i was mounting one of my pulleys on the left side of my engine Punctured into the timing section (not knowing at that moment what had happened) i started the engine and it touched the chain & caused the chain (on the left bank) to either jump or skip a tooth or two.
And now the engine has a misfire on cylinders 2 & 4 and has a bad knock.
Being that the misfire is only on 2 & 4, that tells me the problem is only on the left. (Where the bolt was to begin with)
So My question is, if I put the chain back in the correct position while keeping the cam in place, will that fix my issue or is there more work to be done.
Ty for reading
The car has 157K miles and was running pretty well beforehand hand.
After the bolt broke through, I did replace the timing cover and belt and power steering pump.
The "bad knock" could be from the pistons hitting the valves, depending on how far out of time the chain skipped.
Yes I'm aware that the knock is from the pistons, but would repositioning the chain correctly fix that issue
No.
If the knock is coming form the piston hitting the valves, no. typically once the piston hits the valve it bends it, and a bent valve wont seal the combustion chamber, causing it to not make compression. I think you have to pull the head, make sure the piston isn't damaged, then basically redo the head.
If very unlucky the pistons could also be damaged, in which case the engine would need to be rebuilt or replaced.
The question is if fixing the chain position stop the knocking & the misfire even tho it may have bent the valve?
No. There can be no expectation of the engine running properly with bent valves and possibly damaged pistons. The damage is done and fixing the chain position won't help unless the damage is repaired.
You need to either pull the heads or maybe use a borescope to evaluate the extent of the damage. If the problem is only bent valves you can repair or replace the affected cylinder head(s). If the pistons are damaged then the engine needs to be either replaced or rebuilt. But your first step has to be evaluating the extent of the damage.
https://www.youtube.com/watch?v=KLyy8ZCNYv4
Is there a chance it didn't damage anything? Or at least not crucial?
If you heard knocking it's hard to see how there would not have been some kind of damage, and any damage to valves or pistons is crucial. As I said the engine internals need to be examined to see what's going on in there. The most thorough way is to pull off the cylinder heads. The cheapest and easiest way is to use a borescope.
So what would fixing the chain position do? Would it help anything at all.
My goal is to stop the knock so I can sell the car
Fixing the chain position will prevent further damage but will obviously not fix any that was caused when the engine was out of time.
There's no way we can tell from here what's going on inside that engine. You could elect to just fix the chain and then do a compression test. If compression is OK and engine runs all right with no bad noises then go buy a lottery ticket - your luck is outstanding. However if compression is bad in some cylinders you know you have damaged valves and/or pistons and then you'd need to dig deeper.
Yeah, so that's all I want to know.
If i can prevent further damage and stop the knock by fixing the chain position.
& If there's a compression issue afterwards that would be a different story.
But at least If I stop the knock I can get rid of the vic and buy something better for the bang
Obviously if you were going to keep the car you'd want to be more thorough but I'd say in this case that fixing the timing problem and checking the compression would be a good way to proceed.
Update, I put the chain/cam back on time, and car started right up, knocking is gone! And no misfire, so as far as I know there is no compression issues!
You are a very lucky man! Be sure to play the Powerball! 😎
Being an interference engine I wouldn't chance it, replace the parts. The phasers could have been damage when that happened as well, in that case it'll never run right unless they're swapped.
Hopefully you got parts with a lifetime warranty, that way you don't have to spring for the bill all over again.
So you're saying that the bolt could have touched the phasers as well?
And if it didn't, and it only jumped the chain would that be an easy fix to just line it up again
They're on the front of the gears & have four long "fingers" coming from them so it's a distinct possibility.
Those phasers aren't known for their durability regardless of brand either. Best bet is to not only just replace those parts but also check cam alignment while you're at it.
I know it sounds like a pain/ excessive but at this point since you already have some experience doing the job it'll go easier & you won't have to worry constantly if the Achilles heel of that design is going to fail you.
As I mentioned about the warranty, if it's still covered just swap all the parts you replaced if the pistons/valves aren't damaged.