The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Crossrodes on July 31, 2010, 05:10:15 PM

Title: Mechanical Timing
Post by: Crossrodes on July 31, 2010, 05:10:15 PM

Awhile ago, while working on my engine I ran into a problem and screwed up my thrust washer on the crankshaft.  So I have had to replace the thrust washer which I have done.  

While I was at it I decided to order a timing chain kit and have now installed it.  The problem I have is that while I marked the crank shaft sprocket with a marker pen as outlined in the Clymer manual, the mark has gone...probably due to a coating of oil (next time I'll use a scribe on this sucker).  So I have installed the chain and lined up the sprockets according to where I "think" I marked the sprocket.  After re-installing the heads etc I have turned the crank to TDC and adjusted the valves.  

So now I have turned the engine over by hand several times and there is no interference between the pistons and the valves.  The question is can I now assume that I have the crank/cam sprockets lined up properly or is there something else I can do to verify correct timing between the crank and the cam?

Title: Re: Mechanical Timing
Post by: Bob_Roller on July 31, 2010, 06:17:08 PM

I know it's quite difficult to see the marks on the gears, but are they close where they should be ?

And congrats on replacing the thrust washer on your engine, not a small task to say the least bit !!!

Title: Re: Mechanical Timing
Post by: Crossrodes on July 31, 2010, 09:43:54 PM

Bob, I believe that the sprockets are close if not right on where they should be based on the valves not interfering with the pistons when I turn the engine over.  I don't know if there would be interference if the timing was off by one or a few cogs though.