Cam problems

Thomas eriksson

New member
6
0
1
Buick Ownership
Gn 1987
Hi
My new comp cam hydraulic roller has a strange problem. the lobes hits the lifter it’s like the cam is to far back but not all of them. The block have no wear at the front
What can course this phenomen is it a bad cam or have I missing something.
 

LARRY70GS

Full Member
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Oakland Gardens, N.Y.
Buick Ownership
98 Riviera, 70 GS455 Stg1
So you are saying the cam goes in too deep and the lifter faces DO NOT align with the lobes? How does it compare to the cam you took out, appearance wise, length?
 

Thomas eriksson

New member
6
0
1
Buick Ownership
Gn 1987
That cam is gone but I think I found the problem look at the surface that go to the block it to flat
 

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Thomas eriksson

New member
6
0
1
Buick Ownership
Gn 1987
Compare to this pics that I found on another cam
 

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HotZ28

Full Member
7,956
705
113
Buick Ownership
1996 Roadmaster Limited Collectors Edition 58k - 1996 PAU
The amount of carbon buildup on the internal parts I see in the pic, leads me to believe that the original owner used inferior oil, or did not change it as often as should have. That internal carbon can turn to sandpaper and damage all internal parts. Do you plan to rebuild the whole bottom end of the engine?
 

HotZ28

Full Member
7,956
705
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Buick Ownership
1996 Roadmaster Limited Collectors Edition 58k - 1996 PAU
Did you install the cam thrust button as shone as item # 104 in the following link?
 

Thomas eriksson

New member
6
0
1
Buick Ownership
Gn 1987
I shims the cam but that doesn’t help when it’s to far back
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