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Cam failure

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supervel45
70 Cobra
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Post  70 Cobra November 22nd 2022, 1:13 am

Building a 429 CJ that had a cam failure, ordered a cam lifters and valve springs from Bullet racing, Driven assembly and break in oil recommend, any other suggestions to avoid a repeat.

Thanks

70 Cobra

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Post  supervel45 November 22nd 2022, 3:07 am

https://www.429-460.com/t28825-429-cam-failure


^Odd. Both lobes on #1 as well as bearing wear at that area. I would double check everything very carefully, including the valve guides and lifter bores on the failed lobes. Sounds like something else going on besides low Zink oil.

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Post  Dave De November 22nd 2022, 6:32 pm

Cam break in service. They offer sell quality lifters as well.

http://www.camresearchcorp.com/camking/
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Post  Lem Evans November 22nd 2022, 8:35 pm

Sometimes it's the lifters that are junk

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Post  70 Cobra December 8th 2022, 9:04 pm

thanks for all your comments and Cam Research info, going to use there service, good insurance

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Post  dfree383 December 8th 2022, 10:21 pm

Make sure the lifter bores are not damaged or too loose/tight
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Post  the tree man December 10th 2022, 9:03 pm

I have purchased 2 cam/lifter kits from Cam Research including his break in service on both and a buddy sent an Isky cam/lifters to him to be broken in. All 3 were solids and the initial starts were with the heavy valve springs installed. No problems. My current cam is in a street engine that,unfortunately,spends most of it's time under 2000 rpm city cruising with lots of idling in traffic. Three summers,over 10,000 miles and all's good. After the first couple break-in lashings I set them in the spring and they're good for the season. This spring they almost could have gone without adjustment so I'm pretty happy. He recommends Valvoline VR-1 20W-50 only and that's all I've run. The oil/filter/magnetic drain plug are still free of any sparkly bits.
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