Re: Cam & Lifter failure

[Dave Casey <dcasey@xxxxxxxxxxxxx>]

I've heard a couple things.
1. Recent hydraulic lifter batches have been substandard. Don't know if this 
has been corrected yet.
2. The SAE standards for motor oil are changing and there are less additives 
in the oils now because of emissions stuff. The roller tappets don't miss 
the additives, but the flat tappets do. The suggested fix for this is to 
either use an additive in your oil (I think GM sells one) that replaces 
these missing ingredients, or to use a diesel oil (Chevron Delo, Shell 
Rotella), which still includes the additives.

Dave Casey

----- Original Message ----- 
From: "Earl H. " <earlh@xxxxxxxxxxxxxx>
To: <1962to1965mopars@xxxxxxxxxx>
Sent: Tuesday, June 26, 2007 9:08 AM
Subject: RE: Cam & Lifter failure


> Nick,
>
> I think it would be hard to blame a cam failure on Mobil One. If the
> cam was broken in correctly, with non synthetic oil, depending on
> the mileage, either a lifter did not establish good rotation on break
> in, or you have a bad lifter or soft cam lobe, or perhaps a bad lifter
> bore. There seems to be more and more of this happening. I have
> been following all these threads with lots of interest. I know Bill went
> thru 2 or 3 cams and experienced lifter sticking. If you do find out just
> what happened, I would love to know. As an after thought, if you
> broke the motor and cam in on Mobil One, then perhaps you could
> blame it on the oil. Synthetic is not recommended for break in.
>
> On our race motors, most have rollers, but with the flat tappet solids,
> even with high spring pressure, we just put the motor together and
> run it. I have never had a cam/lifter failure. So I am having a hard
> time understanding why everyone is experiencing this issue.
>
> Earl
>
> Has anyone had a premature failure of cam lobes or lifters using Mobil 1
> synthetic oil. Soon after the last oil change. Valve lash on 3 lifters is
> now up to .084. 440 wedge with Comp Cam & hyd. lifters.
>
> I think I remember some messages on this subject.
>
> Thanks,
>
> Nick Tiberio
>
>
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>
> ----
> Please address private mail -- mail of interest to only one person --  
> directly to that person.  I.e., send parts/car transactions and 
> negotiations as well as other personal messages only to the intended 
> recipient, not to the Clubhouse public address. This practice will protect 
> your privacy, reduce the total volume of mail and fine tune the content 
> signal to Mopar topic.  Thanks!
>
> '62 to '65 Mopar Clubhouse Discussion Guidelines:
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----
Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.