Engine longevity ?

Engine longevity ?

Postby webcat [OP] » April 18th 2009, 7:44am

on average , How many miles would a typical 305 or 350 bottom end last if it was maintained very well ?
i was looking around online and saw some people saying about 150,000 miles some even said about 400,000 , i was guessing mayby 230,000 would be about right .
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Re: Engine longevity ?

Postby gtkane » April 18th 2009, 7:54am

Maintenence is only half the battle....driving habits greatly affect life also!

Normally driven, 200k miles sounds right.

If you are regularly bouncing off the limiter at 8000rpm's, it wouldn't be long before the mains spin and it barfs out a rod.
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Re: Engine longevity ?

Postby webcat [OP] » April 18th 2009, 8:23am

good info , Thanks
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Re: Engine longevity ?

Postby Big_kid » April 18th 2009, 1:37pm

My first car was my dad's old '76 Caprice. It had 222K when I got it, and I drove it like a 16 yr old with a 350 in his first car for almost another 30K. Almost 3 years later I finally spun a bearing & puked out a rod along with a 3 piece camshaft. The 77 Impala he replaced it with had around 150K when he sold it, still going strong(and I had that one wound up TIGHT a few times). That was a FAST car.

We ALWAYS used Valvoline 10-40, changed every 5K, and changed the filter every other change.

I'd say that a carefully driven, well maintained SBC bottom end will last for a long, long time. YMMV.
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Re: Engine longevity ?

Postby webcat [OP] » April 18th 2009, 11:28pm

good to know !
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Re: Engine longevity ?

Postby rich1902 » April 19th 2009, 1:10am

I have got 300,000+ on my service vans, with out any major repairs

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Re: Engine longevity ?

Postby davesyo » April 19th 2009, 1:49am

Engine life can be increased greatly by using a good brand of synthetic oil.
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Re: Engine longevity ?

Postby webcat [OP] » April 19th 2009, 3:13am

300,000 on a service van sounds pretty impressive as i imagine you have alot of weight in the back with tools and all
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Re: Engine longevity ?

Postby daisykleen » April 19th 2009, 5:42pm

If you take care of it should take care of you i had a 92 with 250,000 wean i sold it and it ran good i have a 99 now and it has 135,00 and runs good oil is the life blood of a astro synthetic oil mobile1 and mobile 1 oil filter is what i use every 8000 to 10000 miles regular tune up gm parts only astro's likes gm parts only!! it should last 300000 to 500000 treat it right!!
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