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K24Z3 Questions, stripped valve cover bolts advice

762 Views 28 Replies 7 Participants Last post by  Brotatochip
Forgive my noobness, I am new to this level of auto repair but I am trying to learn. I have a 08 accord EXL and decided to open my valve cover recently to do some inspection of the engine as I bought it recently. I checked timing and see if I have the updated VTC actuator (I have startup rattle). Turns out my timing chain tensioner is fucked, with something in it broken. Gonna replace it with a new oem part. Timing is slightly off, cam tdc has crank about half an inch off of tdc.When I was putting it back together, I rushed a little because I needed the car soon and stripped 2 valve cover when trying to torque it down (was tightening each one slightly going around all 6 bolts and didnt realise 2 were spinning).

So my questions are: Can I time the engine by setting cam TDC, taking timing chain off cam, setting crank to TDC, put chain back on cam, place in new tensioner, turning crank a few times to verify timing, readjust if wrong. I realise it likely wouldnt be perfect but would be better than what its like currently? I would also like to avoid taking off the timing cover if I can...

Another question is do i need to take off the cams down to the cylinder head in order to helicoil the threads? I tried looking up someone doing it on this engine and couldnt find basically any information. But it seems like it goes: remove camshaft bolts, take off both the top and bottom camshaft assembly, helicoil threads on cylinder head, reinstall camshaft assembly, then im good?

Let me know if these plans are wrong, again sorry for my noobness.
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It's almost certainly not stripped in the head. Those bolts are much larger than the little 6 mm threads on the end for the valve cover. Pull the valve cover and replace the bolt with a new one, good as new.

How many miles are on this? You sure the timing chain hasn't stretched causing it to jump time? Might not be a bad tensioner.
How many miles are on this?
This would be a good indicator of chain stretch. I once had a '07 Accord with 280k miles on it (mostly highway). It jumped time and bent valves. The chain had stretched so much over time the tensioner could no longer keep it tight. The stretching was actually causing it to eat through part of the chain case.
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It has 145k miles on it. Would like the car to last to 200k
That's not enough to have severe chain stretch in my opinion. Could be a failed tensioner as you mentioned.

Oh, handsome, your hands are too strong. Forgive me if I can't help you
What does that have to do with this thread?
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You don’t know that I’ve stretched a chain in under 60k miles under extreme driving conditions.
OEM chain or an aftermarket brand? When I say 145k miles isn't enough for severe stretching, I assume it isn't in extreme conditions. I absolutely could be wrong. I have had a cheap aftermarket chain stretch significantly after just 40k miles, and not in extreme driving conditions.
Still just gonna replace it anyways and be good for another 100k miles, since I’ll need to take the cover off to time it again anyways
Probably the best course of action.
You might have broken the tip off the bolt. If that were the case, the valve cover can be removed with that nut still there.
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