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Location:
Canberra
Registered:
May 2002
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Toyota bearing "Mark" increments
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Thu, 12 August 2004 08:28
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I need to purchase a set of main & conrod bearings for a 20V 4AG from toyota, I have the part numbers, but what exactly do the "Mark 1, Mark 2, Mark 3" designations mean? I know that for pistons they are slight diameter increments to match each bore exactly, but how much difference is there between each 'mark' with bearings?
Thanks in advance 
Phil
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Location:
On your mum!
Registered:
May 2002
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Re: Toyota bearing "Mark" increments
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Thu, 12 August 2004 13:54
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Phil - I am unsure of the answer to this, but give the clearance something to the order or .002" to .0025" I guess that there would only be 1/10ths of thous in it. Why not measure the crank pins and journals and see how much difference there is? This would go a ways to telling you how close they are to each other and how bearing numbers relate.
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Location:
Canberra
Registered:
May 2002
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Re: Toyota bearing "Mark" increments
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Fri, 13 August 2004 11:10
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Thanks Jason. Found out today that the corresponding "Mark" numbers are stamped inside the block for both the main & conrod bearings from production. I was looking on the rods & crank themselves, the block has a lot of oil sludge baked onto everything, I guess the stamping will be easy to see once its had a bath
Cheers
Phil
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