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| | | | Joined: Mar 2002 Posts: 553 Shop Shark | | Shop Shark Joined: Mar 2002 Posts: 553 | I have this GMC 248 I'm getting ready to fire up. It's been sitting a long time. I drained the oil and there's some thick sludge still coming out. Is there something I can pour in to get the sludge out? Or should I just drop the pan? | | | | | Joined: Feb 2004 Posts: 29,760 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,760 | Fill the crankcase with a 50/50 mix of 30 weight oil and Kerosene or Diesel fuel, fire the engine up, and idle it for about 15 minutes. Don't drive it or put any load on the engine, just run it at a slightly fast idle until it warms up, then drain it while it's warm. You'll be surprised at the crud that comes out!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Aug 2010 Posts: 368 Shop Shark | | Shop Shark Joined: Aug 2010 Posts: 368 | I really wanted to make sure my lower end was clean..so I did the above mentioned method twice..then pulled the pan and changed the gasket...I also did the Tranny and rearend at the same time..might as well start with clean fluids.
Enjoy | | | | | Joined: Mar 2002 Posts: 553 Shop Shark | | Shop Shark Joined: Mar 2002 Posts: 553 | Decided to drop the pan. WOW! Am I glad I did. Talk about sludge city! It's gonna clean up good though. | | | | | Joined: Jan 2001 Posts: 1,422 ODSS President | | ODSS President Joined: Jan 2001 Posts: 1,422 | I think dropping the pan was the smart move. I am currently retro-fitting a splash-oil pan for my '54 and there are 38 spot welds for small metal paticulates to hide between nooks and crannies. I think you'll just have the baffles to contend with. This would be IMHO, a great application for Glyptal, a paint that would seal the inner surface of your pan. What's $16 bucks or so for a little peace of mind?
~ Cosmo
1949 Chevy Half Ton
Rocinante, like Don Quixote, he is awkward, past his prime, and engaged in a task beyond his capacities.
"...my good horse Rocinante, mine eternal and inseparable companion in all my journeys and courses." ...Don Quixote, Cervantes
"If you come to a fork in the road, take it."...Yogi Berra
"Rudeness is the weak man's imitation of strength." ...Eric Hoffer
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