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Registered
Join Date: Jun 2014
Posts: 2,475
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1974 bearing and crank scaring ?
Looking for some answers. 1974 bearing and crank scaring ? Any help is appreciated. Thanks!
 
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05-23-2019, 03:24 AM
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Puny Bird
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 4,566
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FOD, dirty oil...
Bearing it's normal in this case as it's a sacrificial part that is made to damage first. The crank happens once the bearing can't take any more damage. Your issue looks like low oil flow, I can see the journal has been running real hot, but it's far from the worst I've seen. Take it to a machine shop, measure, magnaflux, polish or grind. Finding undersize bearings is an issue (and cost) so know what's available before you approve regrind work.
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'74 Porsche 914, 3.0/6 '72 Porsche 914, 1.7, wife's summer DD '67 Bug, 2600cc T4,'67 Bus, 2.0 T1 Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend. Last edited by Mark Henry; 05-23-2019 at 05:11 AM.. |
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05-23-2019, 05:08 AM
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Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
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It's hard to tell in the picture, but as Mark mentioned, polish the journal and then measure it. It may still be in spec, but careful polishing and measurements are required to verify.
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Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage |
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05-23-2019, 09:02 AM
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Puny Bird
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 4,566
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I agree it's hard to tell, you always want a light polish first then measure. Any scratch that can really catch a fingernail on likely won't polish out, but sometimes a minor imperfection can be tolerated. A std/std is always the best crank to have, I've had journals that look like yours come out in spec, but you won't know till it's checked.
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'74 Porsche 914, 3.0/6 '72 Porsche 914, 1.7, wife's summer DD '67 Bug, 2600cc T4,'67 Bus, 2.0 T1 Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend. Last edited by Mark Henry; 05-23-2019 at 10:28 AM.. |
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05-23-2019, 10:25 AM
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Registered
Join Date: Jun 2014
Posts: 2,475
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Thanks! I really appreciate the information. Helps a lot.
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05-24-2019, 03:42 AM
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My Garage
1971 Porsche 911
Baja Bug
