CLASS RACER FORUM - Any machinists set valves on an DOHC motor?

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Re: Any machinists set valves on an DOHC motor?

Art,
To convert the MM feeler gauges to standard just multiply by .03937.

1mm x .03937= .03937
.5mm x .03937= .01968

Re: Any machinists set valves on an DOHC motor?

Quote:

Originally Posted by art leong (Post 251199)

I have been looking at my solid lash adjusters. And there is no room to get a feeler gauge inbetween the valve and the rocker (the rocker has a channel that rides on the valve)
http://i203.photobucket.com/albums/a...2/000_0033.jpg
http://i203.photobucket.com/albums/a...2/000_0032.jpg
I can measure the distance between the cam and the roller on the rocker.
http://i203.photobucket.com/albums/a...2/000_0029.jpg
http://i203.photobucket.com/albums/a...2/000_0030.jpg
The only way I can adjust them is to do it one cylinder at a time (2 intakes or 2 exhausts)
Then pull the cam and adjusters lock the locknuts, then recheck them. Then move on to another pair of valves
Any ideas on an easier way to do it?

Art,
I'd cut the adjuster boss down to where you can get a wrench on the adjuster in there real easy or if this is a super stock motor I'd weld the adjuster to the rocker and make the pad that the rocker sits on stationary. (as long as there's room for cam/cams

Re: Any machinists set valves on an DOHC motor?

Art,
What is the actual Rocker Ratio? You know,measured... Measure the lobe lift and then the valve lift @ "0" lash. Then divide the required lash, at the valve tip, by the RR and set at the roller.
You do realize with a set up like that you can alter the RR with tip length of the valve. It can also move the cam timing around a little.

Re: Any machinists set valves on an DOHC motor?

Get a pair(1 Int and 1 ex) set at the valve to whatever lash you want and then see what it is between the cam and the roller. A feeler gauge should work ......Once you know the number that is at the cam/roller with the proper lash at the valve tip..... set them all at the cam/roller contact area. They do make very thin open end wrenches once know as tappet wrenches that might work on the adjusters...

I agree that motorcycle engine mechanics would have tools to do this....My son has been around motorcycles all his life......

I also think Terry's idea of cutting the bosses down is a very good one......Not real hard to do it either.....

Re: Any machinists set valves on an DOHC motor?

I'm thinking of cutting the bosses down some Fabricating a wrench that I can use on there. Possibly drilling holes for set screws to stop the lifter from turning.
But this will probably be for next season.

Re: Any machinists set valves on an DOHC motor?

Never mind . It looks like you don't have any room to close up the adjuster height any.
Yep. Machine the bosses down when you get the head off.

Re: Any machinists set valves on an DOHC motor?

Art
Rich is correct about the tappet wrenches, Sears sells them.They are about .250 thick.
Rich