The lash pad fits between the rocker arm and the valve.Comes in various sizes to correct the geometry.
Chris Simpson wrote: > The lash pads are the part of the rocker arm that the camshaft actually > presses on. THey are replaceable and often wear down after 100,000's of > kms. By changning the base circle of the cam you are changing the part of > the lash pad that it wipes, hence often needing new ones > > Chris > > Kristian Walsham writes: > > > Thanks Errol, > > Silly question, but where do the lash pads go? I thought they only had >pivot points/ rocker arms. I couldn`t see any lash pads in workshop manuals. > > > > Kris. > > ----- Original Message ----- > > From: E Smith > > To: [EMAIL PROTECTED] > > Sent: Tuesday, May 21, 2002 12:27 PM > > Subject: RE: valve train geometry > > > > > > Valve train geometry is a broad term used to describe the changing relationship >between rocker arm angle in relation to the valve stem motion. > > > > In the L series its main relevance is the position of the wipe of the cam lobe >on the rocker pad. > > > > The standard geometry ensure that the wipe is in the middle of the pad. When a >regrind (non billet) cam is used the cam grinder takes meat of the base circle of the >cam to get more lift, change duration and lift ramp angles. Regrinds require the use >of thicker lash pads to correct the change of rocker angle. The increase in lash pad >thickness = amount removed from base circle of cam times 1.5 (for rocker arm ratio). >Eg 2 mm of cam base requires a 3 mm thicker lash pad. > > > > The rocker geometry also has an effect on the valve stem as well. If the angle >is not brought back to design specs the rocker tends to pull the stem against the >guide causing premature guide wear. > > > > My 2 cents worth. > > > > Cheers > > > > Feral Errol > > > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED]]On Behalf Of Kristian Walsham > > Sent: Tuesday, 21 May 2002 10:35 AM > > To: [EMAIL PROTECTED] > > Subject: valve train geometry > > > > > > > > Hi all, > > > > Can anyone please explain what is meant by valvetrain geometry in the L >series. I have a basic idea but i`m lost when it comes to checking it to see if it is >correct and how it is corrected. > > > > > > > > Thanks, > > > > Kris. > > > > > > > > Plenty of explanations welcome!! > > > > > > --membersozdat------------------------------------------------------- > > OZDAT Mailing List Please Note:- > > Send (un)subscribe requests to [EMAIL PROTECTED] > > Send submissions to [EMAIL PROTECTED] > > No unauthorised redistribution of this email > > http://www.ozdat.com/ozdatonline/index.htm > > http://www.ozdat.com/ozdatonline/listindex.html > > http://www.mail-archive.com/[email protected]/ > > --------------------------------------------------------------------- > > --membersozdat------------------------------------------------------- > > OZDAT Mailing List Please Note:- > > Send (un)subscribe requests to [EMAIL PROTECTED] > > Send submissions to [EMAIL PROTECTED] > > No unauthorised redistribution of this email > > http://www.ozdat.com/ozdatonline/index.htm > > http://www.ozdat.com/ozdatonline/listindex.html > > http://www.mail-archive.com/[email protected]/ > > --------------------------------------------------------------------- > > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
