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Those building BBC engines BEWARE......

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Old Jul 12, 2016 | 09:11 AM
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Default Those building BBC engines BEWARE......

I had customer call me last night with what he thought was 2 pairs of Morel Bushing lifters that had pre-mature failure. They had broken the tie bars and spun in the bore. This put a deep groove in the camshaft on these lobes.

This engine had not made the power we had suspected in would but for a pump gas BBC it was still 720HP plus.

While on the phone he sent me some pictures. The Smoking Gun was in this picture:

The BBC lifter WILL FIT IN THE BORES UPSIDE DOWN. ALWAYS CHECK THAT YOU HAVE THE ARROW POINTING UP.
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Old Jul 12, 2016 | 01:49 PM
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Originally Posted by StraubTech
I had customer call me last night with what he thought was 2 pairs of Morel Bushing lifters that had pre-mature failure. They had broken the tie bars and spun in the bore. This put a deep groove in the camshaft on these lobes.

This engine had not made the power we had suspected in would but for a pump gas BBC it was still 720HP plus.

While on the phone he sent me some pictures. The Smoking Gun was in this picture:

The BBC lifter WILL FIT IN THE BORES UPSIDE DOWN. ALWAYS CHECK THAT YOU HAVE THE ARROW POINTING UP.
Stuff like this makes me cringe. Just like ignoring the stamped numbers on bearing caps, con rods, pistons and other internal parts. The markings are there for a purpose. At least this installer will not make the same expensive mistake again.
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Old Jul 12, 2016 | 01:56 PM
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Originally Posted by StraubTech
I had customer call me last night with what he thought was 2 pairs of Morel Bushing lifters that had pre-mature failure. They had broken the tie bars and spun in the bore. This put a deep groove in the camshaft on these lobes.

This engine had not made the power we had suspected in would but for a pump gas BBC it was still 720HP plus.

While on the phone he sent me some pictures. The Smoking Gun was in this picture:

The BBC lifter WILL FIT IN THE BORES UPSIDE DOWN. ALWAYS CHECK THAT YOU HAVE THE ARROW POINTING UP.
Who put the lifter in upside down?
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Old Jul 12, 2016 | 06:27 PM
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Originally Posted by bluedawg
Who put the lifter in upside down?
The owner of the engine. He had the short block built then put cam, lifters and heads on it himself. He understands and glad we figured it out with a picture.
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Old Jul 12, 2016 | 06:38 PM
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Originally Posted by bluedawg
Who put the lifter in upside down?
I was going to ask that too! I don't think I could get drunk enough to do that, but who knows?
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Old Jul 12, 2016 | 06:45 PM
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It should be obvious, but the link bar is upside down and not a lifter.
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Old Jul 12, 2016 | 07:45 PM
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The trouble is, with offset lifters the upside down link bar is holding the lifter rollers at the wrong angle on the cam. The rollers were not rolling...
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Old Jul 12, 2016 | 08:50 PM
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Well...he'll have a lot happier motor when he straightens out that little problem.


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Last edited by 427Hotrod; Jul 12, 2016 at 08:51 PM.
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Old Jul 13, 2016 | 07:17 AM
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Originally Posted by lionelhutz
It should be obvious, but the link bar is upside down and not a lifter.
I'm guessing you can flip the lifters over and they will be 180 deg. and the tie bar would then be right side up?
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Old Jul 13, 2016 | 09:21 AM
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Originally Posted by gungatim
I'm guessing you can flip the lifters over and they will be 180 deg. and the tie bar would then be right side up?

Yes you are correct.
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Old Jul 14, 2016 | 12:22 AM
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Originally Posted by CanadaGrant
The trouble is, with offset lifters the upside down link bar is holding the lifter rollers at the wrong angle on the cam. The rollers were not rolling...
Oh....ok, having never built a big block, i was imagining the pushrod recess facing the cam and for the life of me was trying to understand how the one of these things is not like the other didn't ring like a bell. Thanks grant, much clearer now.
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Old Jul 14, 2016 | 03:22 PM
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Making 720 with 2 lifters not rolling? He's going to be really happy when things work like they're designed!
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