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A Stationary Engine Enthusiasts Forum


Valve Lapping

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www.ukengineforum.forumotion.com :: Stationary Engine Section :: Tricks Of The Trade

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Valve Lapping Empty Valve Lapping

Post by Woodsman Wed Jul 06 2022, 15:51

Just in case anyone hasn't come across this one I thought I'd post a tip from an old car restorer friend.
Short length of flexible pipe to suit valve stem and ditto piece of sawn off bolt/nail at t'other end.  
Connect drill and away you go.

Valve Lapping 20220715


Last edited by Woodsman on Thu Jul 07 2022, 10:41; edited 1 time in total (Reason for editing : typo)

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Valve Lapping Empty Re: Valve Lapping

Post by maryalice Wed Jul 06 2022, 23:27

You obviously dont like hard work Very Happy Very Happy

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Valve Lapping Empty Re: Valve Lapping

Post by wristpin Tue Mar 14 2023, 13:52

I was taught that continuous rotation was the wrong thing to do, and that back and forth, lift, move round a bit and repeat - several times. Then wipe off, inspect and repeat again as necessary.
Spinning with a drill was known as "a hanging offence"!!
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Post by Woodsman Tue Mar 14 2023, 17:04

Agree entirely -  should have been more explicit . Apologies.


Last edited by Woodsman on Mon Mar 11 2024, 16:18; edited 1 time in total

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Valve Lapping Empty Re: Valve Lapping

Post by tony RA Thu Mar 16 2023, 01:17

I totally agree with Wristpin having been a mechanic for 60 years and using a drill was no no back and forth is the only way to seat a valve properly

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Valve Lapping Empty Re: Valve Lapping

Post by mattblack Thu Mar 16 2023, 06:32

https://www.ebay.co.uk/itm/354067905320?hash=item5270177b28:g:nUEAAOSwwORihiky&amdata=enc%3AAQAHAAAA4OZyZexv656MhT80f4q42EAFBoZ9aVaRAjw9BP0y8VnnvJEmC4e%2FbSdjh724VenthLJJoMw1Y%2Fe8TGlWva%2Fm58ew3nLt9psQWoXcg0QBEet%2FK06x4nblZLysnrcIa%2BtTe44KTaHCt0DAVXmQR2vajHItS%2B0XzegIpg0PVNPYuFX7Ido90jwKFDpWUkgucZQ%2F%2BiTs2F91LG9Pu26xVVn%2FT6Rmp8oVd3ppD5fGA2kKOTJpTFOcduM6hqMB0GPczffvEZ0zxqhp1stpNoC2wAtLv73g4gWmvNYrxguJEZUSs9fy%7Ctkp%3ABk9SR6ii35HdYQ

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