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Tappet & guide
Posted: Wed Mar 14, 2018 4:46 pm
by Stuart Jenkins
Hello,
I'm doing an engine rebuild on my heavyweight single and was wondering what is acceptable wear for the tappet and guides? Not on the surface of the tappets but side to side play between them?
Any thoughts?
Many thanks
Stuart
Re: Tappet & guide
Posted: Wed Mar 14, 2018 6:40 pm
by clive
http://archives.jampot.dk/book/Workshop ... ndards.pdf look at page 9 in this document which lists the tolerances acceptable to the army in 1953.
Re: Tappet & guide
Posted: Wed Mar 14, 2018 6:48 pm
by SPRIDDLER
It would seem to be 5 to 7 thou clearance. Have a look at page 9 of the Army Inspection Standards manual in the link below. It's for the WD 350 but as far as tappets and guides and other bits are concerned, equally relevant to your 500.
Your Profile says you have a 1943 G3L but you have posted this question in the 500 H/W section. ...... 
http://archives.jampot.dk/book/Workshop ... ndards.pdf
Extract below. Column 2 New dims. Col 3 Acceptable. Col 4 Condemned.
Guide to tappet clearance.JPG
Oops! Reply crossed with Clive's.
Re: Tappet & guide
Posted: Thu Mar 15, 2018 11:33 pm
by Stuart Jenkins
Excellent.
That's a great reference, i've now downloaded it!
Many thanks
Stuart