Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

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robert1839
Tristan Cook
5579 Timber Ridge Dr, Mt Vernon, Skagit, Washingto
(118 posts)

Registered:
05/06/2013 11:11PM

Main British Car:
MGB GT 1972 Buick 215

cam new or reground
Posted by: robert1839
Date: October 05, 2013 11:03PM

it is time to deal with my cam problem it is pitted and needs to be reground or get a new one i have read that regrinding is bad because they dont get reharden but they are a lot less expensive than a bran new one so whats the deal with them


mgb260
Jim Nichols
Sequim,WA
(2465 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: cam new or reground
Posted by: mgb260
Date: October 05, 2013 11:16PM

Tristan, Delta Cams in Tacoma does excellent regrinds. Give them a call and see what they recommend. Most important is to use oil with Zinc in it for ANY flat tappet cam. Also ALWAYS use new lifters with a new or reground cam.



Edited 1 time(s). Last edit at 10/05/2013 11:19PM by mgb260.


robert1839
Tristan Cook
5579 Timber Ridge Dr, Mt Vernon, Skagit, Washingto
(118 posts)

Registered:
05/06/2013 11:11PM

Main British Car:
MGB GT 1972 Buick 215

Re: cam new or reground
Posted by: robert1839
Date: October 07, 2013 01:39AM

Jim Nichols,
i will buy new lifters if i get a new cam. but why is it so important what happens if i used old ones
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mgb260
Jim Nichols
Sequim,WA
(2465 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: cam new or reground
Posted by: mgb260
Date: October 07, 2013 07:52AM

The lifters get flat on the bottom instead of convex(curved to allow rotation.) Also they develop a wear pattern to that lobe. You treat a regrind the same as new because the lobes are hardened. If a person takes out the lifters on a used cam and doesn't put them back in the same holes they will grind down the cam lobes. If you use oil without a zinc additive also,


robert1839
Tristan Cook
5579 Timber Ridge Dr, Mt Vernon, Skagit, Washingto
(118 posts)

Registered:
05/06/2013 11:11PM

Main British Car:
MGB GT 1972 Buick 215

Re: cam new or reground
Posted by: robert1839
Date: October 07, 2013 07:13PM

ok thanks i just bought some oil with zinc in it today so i am ready


MG four six eight
Bill Jacobson
Wa state
(325 posts)

Registered:
10/23/2007 02:15AM

Main British Car:
73 MGB Buick 215, Eaton/GM supercharger

Re: cam new or reground
Posted by: MG four six eight
Date: October 08, 2013 12:13AM

Tristan,

X2 for Delta cams. I had them do a custom grind for me and it's working out well.

Bill


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