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Old 03-09-2010, 11:30 PM   #1 (permalink)
GlowPlugChuck
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I think I got sludge

This has had me worried for sometime. I want to know if my engine has signs of sludge but can't figure out how to check. I've been changing the oil every 2,000 mi but the motor has been running cold according to the gauge. It reads just between the 100 and 210 mark.

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Old 03-09-2010, 11:43 PM   #2 (permalink)
Trios
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Verify your gauge with something more reliable before you start worrying too much. These gauges are not very exact.

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Trios is right.
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x2 Trios is right lol
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Old 03-09-2010, 11:46 PM   #3 (permalink)
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Originally Posted by Trios View Post
Verify your gauge with something more reliable before you start worrying too much. These gauges are not very exact.
x2 Trios is right lol
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well to make your pump retarded, you could let it hang out with me for a day
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Old 03-09-2010, 11:56 PM   #4 (permalink)
GlowPlugChuck
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Ok. I guess I'll have to to check the local parts store tomorrow to see if they have a temp gun. I hope they do.
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Old 03-10-2010, 12:22 AM   #5 (permalink)
chevyman98
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pull the valve cover or where the oil is poured into the valve cover, shine a light and see if there is sludge on top of the cylinder head
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Old 03-10-2010, 12:32 AM   #6 (permalink)
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pull the valve cover or where the oil is poured into the valve cover, shine a light and see if there is sludge on top of the cylinder head
I can do that on a sbc no problem, but on a 6.2 the oil cap is up front like on old oldsmobile V8s
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Old 03-10-2010, 12:49 AM   #7 (permalink)
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Originally Posted by GlowPlugChuck View Post
This has had me worried for sometime. I want to know if my engine has signs of sludge but can't figure out how to check. I've been changing the oil every 2,000 mi but the motor has been running cold according to the gauge. It reads just between the 100 and 210 mark.
I would change the thermostat and not worry about it unless your hearing a bad or stuck lifter. Changing your oil every 2k is going to get rid of sludge.
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Old 03-10-2010, 08:11 AM   #8 (permalink)
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pull the valve cover or where the oil is poured into the valve cover, shine a light and see if there is sludge on top of the cylinder head
Pulling the valve covers on these is an ordeal....... to do so you have to pull the intake so you can loosen the injector lines to get them out of the way because it's BAD to bend them....

and like has been said...... the oil fill is NOT in the valve covers either.....
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Old 03-10-2010, 08:22 AM   #9 (permalink)
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Does your '91 have the CDR mounted on the valve cover? It's easy enough to take off and have a look see
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Old 03-10-2010, 08:25 AM   #10 (permalink)
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Does your '91 have the CDR mounted on the valve cover? It's easy enough to take off and have a look see
Most of the CDR holes in the valve covers have a "shelf" under the hole to keep oil from being splashed directly into the CDR....... and alot even have a steel wool type mesh on that shelf.......

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