i just got a 99 500 scrambler and i rode it untill the plug blew out of the head. so i took the head off and had the head threads re-done, and i ordered in a gasket set for the top end but i dont know the head torqe specs nor do i know how the cam should be positioned when i put it back in time. i found the crank timing mark on the right side of the motor and thats it. can any one help me out???
Sebastianpavich
Joined
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2,337 Posts
Hopefully ,you got the OEM style head gasket- the steel plate type-if you got the layered stamped style ,they are prone to leak.
On the 500, it has a torquing sequence, they want you to smah the gasket in stages, then loosen up, then retorque and do these diagnolly just as were tightening the intake on a car engine.
First stage-22 ft-lbs.
Second stage-51 ft.-lbs.
Third stage-loosen half turn
fourth stage-loosen another half turn
Fifth stage- Tighten to 11 ft-lbs.
Sixth stage-tighten 1/4 turn
Seventh stage-tighten another 1/4 turn-done
For the cam,with the pointer on the crank at top dead center, and with cam installed, set cam into chain, the two dots on the cam should be parallel with the top of the head,install cam gear onto cam,after installing ,you'll need to put some tension on the chain either temporarilly install chain tensioner or use a screw driver to put some tension on the chain, while doing this rotate the crank a couple times and reinspect timing marks, you may have to move the cam gear back a tooth or two. either way it has to be in time with tension on the chain.
On the 500, it has a torquing sequence, they want you to smah the gasket in stages, then loosen up, then retorque and do these diagnolly just as were tightening the intake on a car engine.
First stage-22 ft-lbs.
Second stage-51 ft.-lbs.
Third stage-loosen half turn
fourth stage-loosen another half turn
Fifth stage- Tighten to 11 ft-lbs.
Sixth stage-tighten 1/4 turn
Seventh stage-tighten another 1/4 turn-done
For the cam,with the pointer on the crank at top dead center, and with cam installed, set cam into chain, the two dots on the cam should be parallel with the top of the head,install cam gear onto cam,after installing ,you'll need to put some tension on the chain either temporarilly install chain tensioner or use a screw driver to put some tension on the chain, while doing this rotate the crank a couple times and reinspect timing marks, you may have to move the cam gear back a tooth or two. either way it has to be in time with tension on the chain.
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