acadian
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- Mar 5, 2010
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Jim Comstock did the reprofile, supposed to be better than flat.
He did mine as well, likely a 4" radius
Jim Comstock did the reprofile, supposed to be better than flat.
1. The lifters are mounted in the engine at 12 deg rearward tilting. That makes the oil puddle up on top of the lifer to flood lube the lifter bores until it finally over flows down the FRONT chamfer of the engine towards the cam.
2. The oil flowing down the FRONT of the lifter bore toward the cam. Naturally if the cam rotates the opposite direction of the crank...the oil will be coming onto the cam and lifters on the leading edge of the action. The cam sweeps from front to rear.
3. Would this not be the preferred location to oil the cam and NOT on the back side of the cams natural sweeping action.
4. Who would purposely put the drain chamfers toward the rear???? engine angle makes no difference to cam lube style
5. Who would not correct an obvious chamfer mismatch ???
Interesting what you learn - I did not know about these chamfers and intended position before this thread.
Also, to make things worse, on my 650 I have 3 x LH tappets and only 1 x RH tappet so can't get the correct configuration with my current set.
They've recently been reground and stellite pads appear well connected and in good shape.
Should I buy another pair (they only seem to come in pairs) or can I (read here "has anyone else done this") repair my orphan - put chamfer in correct location and braze and dress the errant chamfer?
I would only repair the upper part of the chamfer (enough to block oil path) with cooling on the stellite pad.
If so they will still run in original tunnels - the RH cylinder outside tappet is the "odd bastard" - all but that one had the chamfers facing forward when I pulled them out
Any constructive advice welcome.
Cheers
Rob
Just a thought - I wonder how many of the catastrophic cam failures we have seen on this forum were due to inadequate lubrication caused by incorrectly installed tappets?
I've got extra tappets if you need them, pm me.