First Generation Firebird-L Mailing List
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There have been some real problems in the last few years with camshaft
break-ins due to the changing of motor oil formulas. Some of the better
lubricating metals such as zinc and magnesium have been removed from modern
oils because they tend to clog the pores of oxygen sensors. Using a diesel
oil such as Rotella T that still has these lubricating metals in them is
recommended for the first few thousand miles with a new flat tappet
camshaft. If you ever wondered why today's engines use roller tappets, now
you know why. Most cam manufacturers sell a break-in additive that serve
the same purpose. If you Google "camshaft break-in" you'll find numerous
articles on the subject.
Stu
----- Original Message -----
From: "S Sterchi" <[EMAIL PROTECTED]>
To: "First Generation Firebird-L" <[email protected]>
Sent: Sunday, September 28, 2008 11:55 AM
Subject: [FGF] Comp Cam Break-in
First Generation Firebird-L Mailing List
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The instructions that came with my XE274 say to take the inner springs out
during break in. The 995-16 springs that go with this cam are very stiff,
409 lb/in. I understand how this will put less force on the valve train and
cam but what a pain in the arse. I already have the heads on. Is it really
practical to get the inner springs off and back on with the heads on the
engine? I can just imagine trying to keep the valves fully seated while
compressing the spring to get the locks on would be next to impossible.
Thanks,
Sheen
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