| [GMCnet] You can tell if you have the plastic cam gear by simply pulling the fuel pump [message #338367] |
Sun, 04 November 2018 21:08  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
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We've all been told for decades. That the only way to see if your 403/455 still has the original plastic cam gear. Was to pull the timing chair cover. That gets involved. I said a few months ago. That putting an inspection camera in the fuel pump hole in the block. You should be able to see the cam gear. Well tonight. I found out that. YES you can see the cam gear. As there was NO WAY in H--- that this 73 GMC that I've been rebuilding. Was going to leave my drive with a plastic cam gear, and an old water pump. So I pulled the water pump. And saw that the timing chain cover had a blue gasket sealer used to help seal the chain cover. ( GM never used a blue silicone sealer back then.) It was time for the inspection camera. And I found that the cam gear had been changed to an iron one. I'm thrilled.
I have two cameras. One for getting into very small places. And a larger one from Harbor Freight. The cheep HF one can work for this inspection job. A lot cheaper/simpler then pulling the cover. Bob Dunahugh
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