Timing chain/balance shaft chain
06-22-2015 | 07:50 AM
#1
Timing chain/balance shaft chain
this is probably my third or so post as I try to search/google everything before asking. Anyway, my car has 135k miles and I started hearing some chain rattle. Searched and it seemed like the tensioner was the culprit. Ordered the revised one and went to replace it this past Friday. While I had the valve cover off I looked all around and noticed the front guide bolt had snapped. So now I have the timing set, balance shaft set, arp guide bolts from CED, crank bolt, and oil pump on order. A couple of questions:
1) When I pre-align the cams before removing the timing chain does this also align the balance shafts at the same time (I would think so)?
2) The upgraded arp guide bolts don't require any modification to the head/block to install?
3) The balance shaft guide bolts/sprocket bolts; are they torque to yield? My Haynes book didn't indicate they are since the Int and Exh cam sprockets it specifically says to replace but not the balance shaft bolts.
Any advice on removing the remaining piece of the guide bolt from the head? I'm trying to do all this without pulling the engine. I do have an engine lift but everything seems to say to pull the engine from the bottom which I don't think I have the means to do.
Thanks for any help and sorry if this information is readily available somewhere. I just haven't been able to find exactly what I'm looking for.
1) When I pre-align the cams before removing the timing chain does this also align the balance shafts at the same time (I would think so)?
2) The upgraded arp guide bolts don't require any modification to the head/block to install?
3) The balance shaft guide bolts/sprocket bolts; are they torque to yield? My Haynes book didn't indicate they are since the Int and Exh cam sprockets it specifically says to replace but not the balance shaft bolts.
Any advice on removing the remaining piece of the guide bolt from the head? I'm trying to do all this without pulling the engine. I do have an engine lift but everything seems to say to pull the engine from the bottom which I don't think I have the means to do.
Thanks for any help and sorry if this information is readily available somewhere. I just haven't been able to find exactly what I'm looking for.
06-23-2015 | 04:28 PM
#2
1) If you pre-align the cams with the chain still on, the balance shafts should also be lined up because both run off the crank. Just don't move the crank after you take the balance shaft chain out and you should be golden.
2) They shouldn't require any modification.
3) Not sure, but my advice would be, if you are worried, just replace them. I'm sure they can't be very expensive, especially for just 2 bolts.
As for the broken off bolt, if it's flush with the head, you can buy the repair bolt from mongorat and not worry about it. It's basically a bolt that replaces the plug in the head, but has a nipple sticking out that fits in the guide hole instead of a separate bolt and plug
2) They shouldn't require any modification.
3) Not sure, but my advice would be, if you are worried, just replace them. I'm sure they can't be very expensive, especially for just 2 bolts.
As for the broken off bolt, if it's flush with the head, you can buy the repair bolt from mongorat and not worry about it. It's basically a bolt that replaces the plug in the head, but has a nipple sticking out that fits in the guide hole instead of a separate bolt and plug
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