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Re: Cam break in oil question
[Re: topside]
#1648715
07/20/14 02:41 PM
07/20/14 02:41 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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He may get away with it but is it worth taking a chance of wiping a cam lobe ? Myself I would just put fresh VR racing oil and the zinc additive in and not worry about it. Ron
Last edited by 383man; 07/20/14 02:42 PM.
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Re: Cam break in oil question
[Re: gss]
#1648716
07/20/14 03:46 PM
07/20/14 03:46 PM
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Joined: Mar 2008
Posts: 5,746 Ontario, Canada
Dodgem
master
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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I don't think EOS (same as mopar crankcase additve) has zinc any longer as it has been reformulated for new roller engines with cats so not worth putting in. add some Comp Cam breakin additive and then another can after break in with a zinc oil like VR1. Combustion byproduct build up in used oil may make it acidic I'd change the oil to some way cheap oil and filter with a can or two of break in additve. after break in 45 to 60 minutes total go New VR1 + comp cams additive. my PS install the cam about 102 to 103 to make it run good.
Last edited by Dodgem; 07/20/14 03:48 PM.
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Re: Cam break in oil question
[Re: gss]
#1648719
07/22/14 11:35 AM
07/22/14 11:35 AM
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Joined: Jan 2003
Posts: 75,012 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,012
U.S.S.A.
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Quote:
I'm helping a friend put a new cam in his 383. Just an old DC .509 that has been on the shelf for 30 years. He last changed his oil 18 months ago with 10/30 VR1 and 1/2 bottle of GM EOS. He has less than 100 miles on the oil change. He insists that it will be fine to leave that oil in for the cam break in and change it out after 30 minutes. I am not totally comfortable with this, but I don't really see a reason not to. Any opinions on this?
Tell your friend that the cost of 5 qts of fresh oil and a bottle of Comp cams breakin additive is cheaper than rebuilding the engine if he loses a cam lobe.
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