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Old 01-13-2011, 05:29 PM
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I have added a quart of diesel fuel to the crankcase of a gooped up engine after it is up to operating temp and let it IDLE for about 15 minutes with no ill effects and got a lot of gunk out of it. Then I suggest you drop the oil pan and check the main bearings . Probably need to roll in a set and may condsider a set of .001 undersize and plastigage them to make sure they are not too tight and then replace with stock type oil pump. Here's another trick I learned by accident . With a good mechanical gauge installed after the engine is up to temp , take the car for a drive and observe the engine oil pressure under acceleration and then under decelleration. If the pressure comes up under decelleration , you can bet you need a set of main bearings. The higher vacuum under decelleration pulls the crank up and decreases clearance to the upper main bearing halves .

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Old 01-13-2011, 06:17 PM
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I saw it done on a Duralube commercial once. They did it with a fire hose
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Old 01-13-2011, 06:27 PM
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Quote:
Originally Posted by T-bucket23
I saw it done on a Duralube commercial once. They did it with a fire hose
Do you remember what product they advertised by draining all the oil out and refilling the crankcase with just water so the lifters would work and had no damage ? Now that was impressive if it is to be believed. I have seen a single cylinder horizontal shaft engine that was treated with Slick 50 with a plexiglass crancase cover run with no engine oil at all in it .
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Old 01-14-2011, 06:43 AM
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Quote:
Originally Posted by adantessr
Do you remember what product they advertised by draining all the oil out and refilling the crankcase with just water so the lifters would work and had no damage ? Now that was impressive if it is to be believed. I have seen a single cylinder horizontal shaft engine that was treated with Slick 50 with a plexiglass crancase cover run with no engine oil at all in it .
I believe it was Dura Lube
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Old 01-14-2011, 08:44 AM
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Quote:
Originally Posted by adantessr
Do you remember what product they advertised by draining all the oil out and refilling the crankcase with just water so the lifters would work and had no damage ? Now that was impressive if it is to be believed. I have seen a single cylinder horizontal shaft engine that was treated with Slick 50 with a plexiglass crancase cover run with no engine oil at all in it .
I remember those Dura Lube infomercials, too. They'd dump what looked like cat litter down onto the engine, then w/the water hose, etc. Real impressive stuff, what w/the local fire department standing by and all.

Many years ago- at the county fair of all places- I watched a guy run an old 318 Poly MOPAR after removing the oil plug and draining all the oil out, including removing the filter. He was there year after year, same old blue-painted engine and stand, etc..

The whole idea was to show how good his snake oil worked to protect your cars engine.

Those old engines had solid lifters, and likely nice loose bearing clearances plus the engine was never ran at high RPM or under any load. All he would do was give it a short rev now and then, then back to an idle.
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