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What is the best method for adjusting the valves? I read the haynes and it seems like there is a better way. Can I just start from one end and work my way to the other, turning each cam lobe straight up and making the adjustment?This seems like the easiest way for me. My book says to use .25mm for intake and .30mm for exhaust. I may have that backwards because I don't have the book handy. These are the hot adjustments, do they sound right? How hot does the engine have to be? I seem to have trouble getting my engine very warm in this cold wheather. The tapping sound I am hearing seems much too loud, to the point where it is annoying. It isn't a knocking. It increases in speed but not loudness when I rev the engine. Another Z I heard run was much quieter.

BTW, that other Z was a 79 that my brother was going to buy fo $300!! All it needed was a new clutch slave cylinder that was leaking, or seals. Great interior and not too much rust. Went to get the money and when we came back it was sold... : (
 

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Discussion Starter #2
> What is the best method for adjusting the
> valves? I read the haynes and it seems like
> there is a better way. Can I just start from
> one end and work my way to the other,
> turning each cam lobe straight up and making
> the adjustment?This seems like the easiest
> way for me. My book says to use .25mm for
> intake and .30mm for exhaust. I may have
> that backwards because I don't have the book
> handy. These are the hot adjustments, do
> they sound right? How hot does the engine
> have to be? I seem to have trouble getting
> my engine very warm in this cold wheather.
> The tapping sound I am hearing seems much
> too loud, to the point where it is annoying.
> It isn't a knocking. It increases in speed
> but not loudness when I rev the engine.
> Another Z I heard run was much quieter.

> BTW, that other Z was a 79 that my brother
> was going to buy fo $300!! All it needed was
> a new clutch slave cylinder that was
> leaking, or seals. Great interior and not
> too much rust. Went to get the money and
> when we came back it was sold... : (
You're right about another way, you can roll the engine over by hand-plugs out makes this easier- and check/make your adjustment on the heal of the lobe-ramp and high point pointing up- hot is best, but you can adjust cold-the manual will have the cold clearance listed- but after the cold adjustment,warm up the engine and double check clearance with the hot spec. you may find some are not right
 

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Discussion Starter #3
> The tapping sound I am hearing seems much
> too loud, to the point where it is annoying.
> It isn't a knocking. It increases in speed
> but not loudness when I rev the engine.
> Another Z I heard run was much quieter.

It's a good idea to adjust the valves, especially if you
don't know how long ago it was done. I had the same
type of noise your describing, adjusting the valves made
no difference. It was an exhaust leak between the
stock manifold and head.....

Regards, BobW
 
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