Scott;
My two cents worth: it helps to use lighter valve springs during break-in
to reduce the loads on the cam lobe/lifter face. Something like OEM valve
springs work well. Use them for the break-in period. Lube everything well,
crank it a few times to build up oil pressure and then fire it up. Bring the
RPM up to 2000 for 10 minutes or so with NO LOAD. After shutting it down and
looking things over, put the heavy-duty valve springs on.
Roller lifters are not nearly so critical as to break-in procedure.
BTW, I'd check the alignment of that particular lifter bore. It might be
cockeyed.
Regards, Neil Tucson, AZ
-----Original Message-----
From: Scott Cowle [mailto:scowle@mentorcollege.edu]
Sent: Friday, April 25, 2003 6:04 AM
To: land-speed@autox.team.net
Subject: camshaft break-in procedures
For many of you this is going to seem like a stupid question but I'm not
racing this weekend because I had my new camshaft lose the #6 exhaust lobe,
and it is a brand new cam with only 3 days of running time on it which makes
me think it went during the break-in procedure. It is a solid lifter cam.
When I put it in I coated all of it liberally with cam lube, then it was
necesary to rotate it a couple of times to set the valves and then I put
more camlube on then STP oil Treatment and then I poured oil over that .
However I was only able to run it for 5 minutes before I had to shut it down
due to a leak and the rockers were way too loose. I( think I screwed up the
break-in procedure and this cost me the cam and this weekend. I don't want
to miss another race , so be honest here, does it sound like it was my
fault, what should I have done? Scott
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/land-speed
/// what is needed. It isn't that difficult, folks.
|