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Old 03-25-2007, 02:09 PM
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Good old Chevy intake gaskets

My first post. I have a 2000 Chevy Express 1 ton van with 110k on it. I bought it last summer with 106k on it. The oil was changed just before I bought the van, so the first time I changed it was last November with 108.5k miles. The oil looked a little brownish, so I knew something was wrong. I ran the new oil for 1500 miles and sent a sample to Blackstone to be tested. The sample showed a .25% anti-freeze contamination. Copper was 62 ppm and lead was 44 ppm (bearing elements). It has a oil cooling system. The universal averages for these elements in 3k oil is 10 ppm.

The repair shop pressure-tested and found leaking intake gaskets, so they're changing them. I'm also worried about the bearing wear. Can bearing wear be be assessed by just dropping the pan and looking at them?

Approx how much would it cost to replace the mains if they are visually bad?

Thanks in advance for all replies

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Old 03-25-2007, 02:23 PM
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The biggest cost would be the labor cost of pulling the motor.
Then they would pull the crank(may need to be ground if anything is ridiculously bad) and check it. Depending on what they see could lead to rebuilding the motor.

As for taking the main caps off after dropping the pan. I dont know that any shop would do that. It would be very hard on that van as well.

I would just run it. Send out the oil after a couple oil changes. and see what comes up in the test.

How much do those oil test cost?
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Old 03-25-2007, 03:46 PM
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oil analysis

They cost $20 at this particular lab in Indiana:

http://www.blackstone-labs.com/gas_engines.html

I'm sure there are others, too.

They send a free oil sample and mailing kit. Fill up the bottle with oil and mail it abck along with a check for $20.
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Old 03-25-2007, 07:33 PM
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oil report

I got my oil tested by Blackstone Labs in Indiana. Cost was $20.
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