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Re: Main bearings?

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Author  [Modern View]
Dick New York

03-17-2013 20:23:32

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First , check the guage , or replace it with a new one . Being that the pressure drops when hot , it is probably not the guage , but that is a good place to start .
Second , pull the base , and check the pump . Sounds like they are a weak point .
Third , plastiguage the mains that you can access , and the rod bearings . ?? Do you hear any knocks when it is hot . Have someone explain to you the different conditions , and sounds of rod , and main bearing knocks . They sound different , and happen under different operating conditions . A bad main bearing can be annoying for a long time , but running with a bad main can cause damage over a period of time . A rod bearing is more serious . It will only knock for a short time . The bearing will eventually spin , and sieze on the crank , and when it goes , it is a disaster . Chances are good that if a rod goes , it will ventilate the side of the block because it will break the rod when the bearing siezes . Good luck

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03-18-2013 02:45:31

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 Re: Main bearings? in reply to Dick New York, 03-17-2013 20:23:32  
No I'm not getting any knocking at all how would you test the gauge? Is using compressed air accurate enough?

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03-18-2013 07:57:58

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 Re: Main bearings? in reply to aarolar, 03-18-2013 02:45:31  
What i have done to check the gauge: Turn down the air presser i have two gauges on my airtank 1 reads the presser in the tank the other reads whats coming out of tank if you can turn down the air that's coming out your good to go so start off at the gauge see how close it is.

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03-18-2013 08:16:08

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 Re: Main bearings? in reply to Trac, 03-18-2013 07:57:58  
Quoting Removed, click Modern View to see

same way mines is setup that's what I was planning on doing

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