I want to replace the valve guides in a set of heads.My choices are BMW original parts or Epco high temp guides,which are a little more costly.Any insights as to these valve guides.??? Thank You
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I want to replace the valve guides in a set of heads.My choices are BMW original parts or Epco high temp guides,which are a little more costly.Any insights as to these valve guides.??? Thank You
HI ,in the past I have taken my heads to my local car speed machine shop, they advised me not to disturb the old guides, but have them reamed and a liner,sleive installed!first time this was done they used my old valves ,that was about20 years ago, a couple of years ago I bought new valves ,300,000 plus km on the old ones,they once again installed a liner slieve,and all seems well, I understand this is popular in the uk on vintage/classic bikes and cars ,it saves the valve seat being recut at different angles,each time the guides are renewed,so far I have put over 200,000km on lined guides, also much cheaper hope this assists Jimmy:lurk
[QUOTE=jimwjarmour;836730]HI ,in the past I have taken my heads to my local car speed machine shop, they advised me not to disturb the old guides, but have them reamed and a liner,sleive installed!first time this was done they used my old valves ,that was about20 years ago, a couple of years ago I bought new valves ,300,000 plus km on the old ones,they once again installed a liner slieve,and all seems well, I understand this is popular in the uk on vintage/classic bikes and cars ,it saves the valve seat being recut at different angles,each time the guides are renewed,so far I have put over 200,000km on lined guides, also much cheaper hope this assists Jimmy:lurk[/QUOTE]
Is this done by anyone here in US?
Sorry I dont know, but the company I used was Forest&Forest racing in Kitchener ontario,they build race cars and drag strip cars and all sorts of street mods , they also race tune motorcycles,just two brothers no web site,but always busy,they have machine repaired my 5th gear shaft and gear,p s I have just found out they have moved premises to Ayr ontario,check your local yellow pages for auto machine shops ,hope this assists ,Jimmy
Hello again,have done a google search under "scroll valve guide inserts"and all sorts came up try head shop for info,also this months" classic bike" a gentleman uses them on his Ducati ,again hope this assists Jimmy
I replaced the guides on my R75/6 with some "high temp" ones. Watch out because some of the are shorter than the BMW part. A little less support for the valve stem.