455 longevity

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Joined: Wed Jul 25, 2018 12:45 pm
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Years Owned: 1969 Toronado owned 4 years

455 longevity

Postby Val » Wed Aug 01, 2018 5:35 pm

What is the expected life span for a 455? I'm seeing many early Toronados for sale with mileage under 100k but with rebuilt or non original motors? Recently found my car also has had a motor change, at around 70k miles, which is when it was restored to this present condition.
Val. T

Otto Skorzeny
Posts: 914
Joined: Fri Feb 28, 2014 12:41 pm
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Years Owned: 1966 Toronado

Re: 455 longevity

Postby Otto Skorzeny » Thu Aug 02, 2018 4:58 am

I think the biggest problem with the engine is that GM used nylon coated timing gears. The nylon disintegrates over time regardless of mileage. The pieces flake off and clog the oil pump, etc.

Hopefully yours was replaced with a regular, nylon free gear set.

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