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Registered:
May 2002
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Old skool - holden 186 and push rods/rocker Q's
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Mon, 06 December 2004 13:35
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I got an old torrie with a red 186 and triple SU's. I snapped some bolts in the head and couldn't get em back out. No biggie though, as I had a black 3.3L from a VK with a hole in a piston. So I drilled the water galleries in the red block, and modified the red manifolds to bolt onto the black head and bolted it all together.
My problem is, the red 186 and black 202 pushrods are different lengths. The red head had adjustable rockers, the black head doesn't. With the red (longer) push rods in, I fear the valves may be being held open. the valves seem to move a long way when I clamp the rockers down. I don't have access to a compression tester and cause of the design of the spark plug holes I can't get any fingers over the hole, but the compression doesn't feel too bad... the shorter rods are fairly loose and give the rockers a bit of play.
I could shim up the rockers with washers and use the longer rods which should work but I don't know how tight they should be. How much should the springs compress when tightening the rockers? I thought not at all (cause if the valve moves even a bit it'll open right?) but someone told me 1.5 turns on the bolt once the rocker puts pressure on the bolt.
Thanks for any help.
Tim.
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