Subject: RE: of valves, guides and liners
Author: brian c
Date: May 3, 2005, 10:58 AM
Post ID: 1718806333
Ahh- just use new guides- that would work too- although with the liners
it seems to be more of a specific fit- they are custom ordered from the
existing valve stem diameter. Also sounds like the material is pretty
well suited to the job:
http://www.hastingsmfg.com/Service%20Tips/valve_guide_liner.htm
But if I just get new guides, I don't have to ream anything... ah
decisions.
Patrick Hayes wrote:
brian c wrote:
Never heard of guide liners, but sounds doable. Why not just put in new guides and use the existing valves? Guides aren't that expensive. Yes, Guzzis do tend to eat valve guides. On older motors they seem to last about 35K before they begin to ovalize. Once the damage starts, it progresses rapidly. I doubt it would be an alignment issue as there is nothing to change in the system. Could it be someone installed aftermarket valves with stems a little too long? In such a case, the rocker arms would impart a more significant amount of lateral force vector in addition to the linear thrust vector. Even with correct standard valves, the rocker arm ALWAYS adds lateral thrust to the valve stem tip. It can only be reduced by use of roller tip rockers. It is common for the guides go before the valve faces do. Newer Guzzis seem to have better guide material and they last far longer. The damage to the old valve guides might also be due to the loss of lead in fuel which was a lubricant and cushion for most of the valve train bits. Patrick Hayes Fremont CA |
near Berkeley, CA
'72 Eldo
'74 Eldo
'95 1100sport
'73 v7sport project