Quote:
Originally Posted by gonzojive
What steps are you recommending to re-time the camshafts, and where would replacing the IMS bearing fit into that procedure?
Before removing the cam covers, the Pelican Parts article on setting the camshaft timing says to put the engine at TDC and install the camshaft timing tool. This makes sense because the shaft is normally held in place by bearings built into the cover. I'm not currently at TDC, and you don't recommend rotating the crankshaft while the IMS isn't support. The timing tool only fits onto the camshaft heads at TDC, so I'm not sure how to proceed with safely removing either camshaft cover. |
Quote:
Originally Posted by Jake Raby
Yes, but now you can't do that, since the cams have jumped from the relaxed position.
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Right. What kind of risk is there in removing the camshaft cover while the camshafts are not secured with a timing tool + the engine is not at TDC? Presumably they'll pop out of their bore from the pressure of the valve springs. Will this damage the bearings on the ends of the camshaft (green arrow below)?
Here's my plan for getting out of dodge:
1) get the camshaft cover off without breaking anything
2) remove the camshafts, and in the process detach the end sprocket, relieving tension on the chain pulling on the IMS
3) uninstall the old IMS bearing, install the new one, and put the bearing cover on
4) rotate the crank to TDC while camshafts are still out. Install the camshafts once back at TDC
5) check the timing of both sides
It sounds like I might also want to check for bent valves?