MOTOBRICK.COM

TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: Duc750 on November 21, 2012, 05:27:41 PM

Title: Checking valve clearances
Post by: Duc750 on November 21, 2012, 05:27:41 PM

Hi Guys

lightly starnge question - for the first time I've actually read the procedure for checking valve clearances in the Clymer manual and it seems to say check the clearances with the piston at TDC. Now both of the valves are closed at TDC I get that but the cam lobes are not a full 180 degrees from the cam follower at that point.
When I've done it in the past I've always measured them with the cam 180 degrees from the follower, have i been doing it wrong.

My clearances have always been right doing it my way but I'm just getting a feeling I've screwed it up every time !

Cheers

Title: Re: Checking valve clearances
Post by: frankenduck on November 21, 2012, 05:43:02 PM

180 degrees is how I do it. (and remember that the intake valves are angled upward and the exhaust valves angled downward)

Title: Re: Checking valve clearances
Post by: Scott_ on November 21, 2012, 05:59:45 PM

Quote from: frankenduck on November 21, 2012, 05:43:02 PM

180 degrees is how I do it.

+1 here too.

Title: Re: Checking valve clearances
Post by: Duc750 on November 21, 2012, 06:02:01 PM

Cool, thanks guys, just having a "moment"  :bmwsmile

Title: Re: Checking valve clearances
Post by: wmax351 on November 21, 2012, 07:42:16 PM

They are mild cams, so it doesn't make too much of a difference. The logic of TDC for a piston is that it is easily reproducible, and close to 180 degrees for the valves.