Nylon cam gear years

[bucket]

It failed in my '78 at around 140k.

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^Iirc, that happened not long after I had the stock sprocket out of my '91 454 and I PUT IT BACK IN. Lol. So far, that sprocket is still sprocketting. Probably close to 100k on it.

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I even put the stock peanut cam back in that thing, after I already had it out.

 

[edgephoto]

This was my timing set. I have owned this truck since 1988. Not sure how many miles but somewhere close to 200K

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[Ricko1966]

It failed in my '78 at around 140k.

You must be registered for see images attach

^Iirc, that happened not long after I had the stock sprocket out of my '91 454 and I PUT IT BACK IN. Lol. So far, that sprocket is still sprocketting. Probably close to 100k on it.

You must be registered for see images attach

I even put the stock peanut cam back in that thing, after I already had it out.

I think it failed about 130k and you kept driving. LOL

 

[CorvairGeek]

Pontiac V8s did seem to have a higher failure rate than other GM products. Interestingly, the Trophy 4 (1/2 of a 389 V8, '61-'63) supposedly had a really good timing chain setup that was good in the V8s too. The 1/2 a V8 was entirely too rough to get acceptable service out of the V8 set.

 

[bucket]

I think it failed about 130k and you kept driving. LOL

Lol, you are sort of correct about that. I made it down to Knoxville TN when I got slowed down in heavy traffic. While creeping along in traffic with the window down, there was a noticeable lope at idle and throttle response was still fantastic. I wondered what might be going on, but it sounded great and even got a compliment from a fellow motorist. I made it to about 1 mile from my exit to Adel in south GA, then the sh¡t hit the fan. My in-laws had to come tow me the couple miles to their house.