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09-24-2012, 07:16 PM
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#1 |
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Registered User
Join Date: Aug 2012
Location: Ringgold GA
Posts: 149
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high mileage engines
At what point do ya'll consider an engine to be high mileage, 100,000? More? Less? What do you do special or different if anything maintenance wise to an engine with a bunch of miles. I've put about 90,000 on the 350 in my 67 since I built it, my grandpaw would drop in a new motor every 100,000 even if it was still running good. He has right at 500,000 on his 71 and its on its fourth engine. Mine is fast approaching 100 grand but it still runs fine so I have no plans of putting in a new motor just curious if there are any rips and tricks to get the most out of an engine.
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67 C10 swb bored out 350 granny 4 speed I come from a long line of moonshiners |
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09-24-2012, 07:33 PM
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#2 |
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Registered User
Join Date: Aug 2012
Location: Junction City, KS
Posts: 782
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Re: high mileage engines
If I built it, high mileage doesn't bother me. My tip is regular Maintenance, fix anything that presents. I always run the same oil and never veer from it. When the oil pressure drops a considerable amount, showing me bearing wear, then I rebuild/replace. Or something catastrophic. That's my thoughts on high mileage and engine replacement.
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Joseph Joe's 69 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=543253 1969 GMC SWB-350 SBC 700R4 2013 Ram 2500 CC Laramie Longhorn Edition-6.7 PPEI EFI Live CSP5 5” ProFlo Exhaust |
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09-24-2012, 08:21 PM
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#3 |
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Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,147
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Re: high mileage engines
If maintained properly a 100k mile motor is just fine. If it starts burning a little oil up the weight.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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09-24-2012, 09:45 PM
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#4 |
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Registered User
Join Date: Aug 2012
Location: Walnut Ridge, AR
Posts: 32
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Re: high mileage engines
Depends on the motor.
I've got a 4.8 that has 230k on the clock and has been beat on every day of it's life. In fact to see 6 grand atleast once a week isn't really uncommon. Especially during the summer months. I've also got a 6.0 with 240k on the clock and still running strong. |
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09-25-2012, 10:30 AM
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#5 |
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Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
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Re: high mileage engines
100k is nothing if the engine was maintained properly. That said, straight 6 tend to last longer than v-8 due to the nature of their design.
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1969 c-10 Step Side Long Bed. I-6 250cid =  = 1969 Pontiac GTO hard top. 400, 4-speed.
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09-25-2012, 11:38 AM
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#6 |
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Senior Member
Join Date: Aug 2002
Location: Valley Center KS
Posts: 3,525
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Re: high mileage engines
To me, its all about maintenance. If its had regular oil changes with the proper oil it should be good.
Newer engines have roller cams and fuel injection, therefore should go MUCH longer. The older engines with a flat tappet cam and not the right additives in the oil can run into problems after awhile. Also, with a carb you can have issues with "washing" the walls with fuel from being WAY to rich. But, like I said keep up maintenance and it should still last a long time. |
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