blutac

tim hill · rice boy Joined: 23 Oct 2001 Posts: 44

how do i cheque the valve clearences with it?

Gene FJ20DET · Posted: Mon Apr 22, 2002 10:11 pm Post subject: Re: blutac

huh?.......
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tim hill · rice boy Joined: 23 Oct 2001 Posts: 44

sorry. the valves on my head might hit the top of my pistons because its a 1600 on a 2L with big valves and a cam. i need to test if they are gonna hit

Gold TX Sleeper · backyard mechanic Joined: 05 Feb 2002 Posts: 509

Take the head off, if it already isn't. Put a small amount of blu-tac on the top of the pistons, replace the head, turn the motor over by hand several times, remove the head, and check the blu-tac for crush or how close the valves came to kissing the pistons. The valves will imprint on the blu-tac showing their lowest point. And go from there.
Jasyn...

Fastgem · tinkerer Joined: 04 Oct 2001 Posts: 166

might want to spray the top of the bluetak with cooking oil or something similar so it doesnt stick to the valves.

Momo · backyard mechanic Joined: 08 Feb 2002 Posts: 561

Hey - if you take your plug out and shine a torch in the hole - could you see the top of the piston hitting the valves, if it was? Someone suggested this to me today.

Gold TX Sleeper · backyard mechanic Joined: 05 Feb 2002 Posts: 509

handy tip !

Ben Wight · backyard mechanic Joined: 04 Oct 2001 Posts: 946

Yes you can, it depends though at what valve lift the valves are hitting, which again depends on cam specs, etc.

Momo · backyard mechanic Joined: 08 Feb 2002 Posts: 561

Cheers Ben.