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Crane Billet Lifters Preload?

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Old Feb 7, 2009 | 09:00 AM
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Default Crane Billet Lifters Preload?
What is the recommended preload for the Crane Billet Lifters. A 7.450 push rod will give me .048" preload. The next size push rod that I have is a 7.5. I found some generic Crane instructions that called for .020 to .060.

Thanks guys!

Rob
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Old Feb 7, 2009 | 09:32 AM
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Originally Posted by Rob 's 73
What is the recommended preload for the Crane Billet Lifters. A 7.450 push rod will give me .048" preload. The next size push rod that I have is a 7.5. I found some generic Crane instructions that called for .020 to .060.

Thanks guys!

Rob
.090 is the exact number.
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Old Feb 7, 2009 | 09:53 AM
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So if I use my 7.5's giving me .098 preload...am I okay?
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Old Feb 7, 2009 | 10:31 AM
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Originally Posted by Rob 's 73
So if I use my 7.5's giving me .098 preload...am I okay?
Yes. With heat expansion/deflection etc.. that should work great.
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Old Feb 7, 2009 | 02:27 PM
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Crane only recommends .020 to .060 for their lifters. I don't know why, but that's what is on their site.
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Old Feb 7, 2009 | 02:58 PM
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Lifter preload and the dizzying array of answers that follow . . . .
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Old Feb 7, 2009 | 06:31 PM
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are these crane boxed morel lifters?
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Old Feb 7, 2009 | 07:02 PM
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I had a set of Morels delivered that I returned. Half of the rollers rolled rough. These are not the Morels. I've been told by a good source that the Crane's are not as finicky (sp) with preload that the Morels/Lunati's are. Is .098 too much?????

Rob
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Old Feb 7, 2009 | 07:04 PM
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Originally Posted by Rob 's 73
I had a set of Morels delivered that I returned. Half of the rollers rolled rough. These are not the Morels. I've been told by a good source that the Crane's are not as finicky (sp) with preload that the Morels/Lunati's are. Is .098 too much?????

Rob
No, .098 is good with the Crane billets.
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Old Feb 8, 2009 | 02:45 PM
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According the the Crane instructions for these lifters, they recommend the following:

For this engine application [Part No. 144536-16 and 144511-16
GM – LS SERIES GEN III & GEN IV ENGINES], extensive testing has shown .060 TO .090 lifter preload, on all Crane Cams Hydraulic Roller Lifters to provide the best power and performance, as well as, minimizing valve train noise.
Here's a link to the instructions: http://www.cranecams.com/pdf/552e.pdf
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Old Feb 8, 2009 | 03:12 PM
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Originally Posted by 405HP_Z06
According the the Crane instructions for these lifters, they recommend the following:



Here's a link to the instructions: http://www.cranecams.com/pdf/552e.pdf
.090 is the KEY number arron. Trust me I know.
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Old Feb 8, 2009 | 03:27 PM
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Originally Posted by JPH
.090 is the KEY number arron. Trust me I know.
I'm not questioning the .090, I just wanted to post the Crane instructions as a courtesy to the OP.

Preload specification noted for future reference.....
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Old Feb 8, 2009 | 09:47 PM
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Originally Posted by 405HP_Z06
I'm not questioning the .090, I just wanted to post the Crane instructions as a courtesy to the OP.

Preload specification noted for future reference.....
Gotcha. Good info man. Thanks.
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Old Feb 9, 2009 | 07:07 PM
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Thanks for the help guys. I sure wish for almost $600 they would have included those istructions in the box.
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Old Feb 9, 2009 | 08:40 PM
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Originally Posted by Rob 's 73
Thanks for the help guys. I sure wish for almost $600 they would have included those istructions in the box.
Agree, it seems they aren't too good at including instructions with anything. Even a small note in the box with a link to the instructions would be better than nothing.
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