Motor Flush. Good or bad? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

61_FL_Apache · 01-28-2018, 10:52 PM

Are these products a good idea?

68Gold/white · 01-29-2018, 10:48 AM

My first hand experience...
A friend had an old Mazda, a beater. Had the valve cover off, replaceing V/C gasket. Inside was caked with sludge, black carbon crap. Engine ran fine, in fact quite well. So my buddy thinks he should buy some "motor flush".
All that crap came loose, got on the cyl walls, you could NOT keep oil in that engine afterwards, didn't use a drop before.

DO NOT use an engine flush unless your engine is already a lost cause (for whatever reason...)

blazer2007 · 01-29-2018, 10:52 AM

My nephew did the same on his jeep and wrecked the engine

61_FL_Apache · 01-29-2018, 05:11 PM

Good enough advise for me..

Thanks guys!!

retrax · 01-29-2018, 05:20 PM

So these are products that go in the engine oil, versus coolant flush products?

95 S_Trucker · 01-29-2018, 11:41 PM

Usually all the crud comes off and clogs the oil pick up.

68Gold/white · 01-30-2018, 10:24 AM

Quote:

Originally Posted by retrax

So these are products that go in the engine oil, versus coolant flush products?

Yes, they make crank case flush also. I believe Gunk made the crank case flush that my buddy used....
It may have some good purpose, but I would never use it...

**G8rN@te61** · 01-30-2018, 03:17 PM

Ive never had a problem. You just have to change the oil right away. Other wise the sludge, if excessive, can clog your filter and thus starve engine of oil. You can also do it slowly and run some high mileage oil with detergents in it and change oil sooner. I also put some seafoam in my oil a few days before I plan to change oil so it assists in cleaning it out. Too much sludge slowing oil flow can burn up piston prematurely.

Old Truck Man · 01-30-2018, 03:24 PM

better to pull the oil pan valve covers and intake and physically clean everything. Why take a chance of circulating all that crud thru your engine? The pictures are of a Tractor oil pan. But ive seen a number of engines of all types with similar gunk. I cleaned the sludge and regasketed the tractor engine. Its now back in service running great.

01-28-2018, 10:52 PM	#1
61_FL_Apache Who Me? Join Date: Sep 2010 Location: Royal Palm Beach, FL Posts: 4,065	Motor Flush. Good or bad? Are these products a good idea? __________________ Steve 1997 Tahoe LT 4D 2WD (DD) 1961 Apache 10 (sold) 1965 C10 Stepper (sold)

01-29-2018, 10:48 AM	#2
68Gold/white Registered User Join Date: Sep 2011 Location: Ark City, Kansas Posts: 3,280	Re: Motor Flush. Good or bad? My first hand experience... A friend had an old Mazda, a beater. Had the valve cover off, replaceing V/C gasket. Inside was caked with sludge, black carbon crap. Engine ran fine, in fact quite well. So my buddy thinks he should buy some "motor flush". All that crap came loose, got on the cyl walls, you could NOT keep oil in that engine afterwards, didn't use a drop before. DO NOT use an engine flush unless your engine is already a lost cause (for whatever reason...)

01-29-2018, 10:52 AM	#3
blazer2007 Registered User Join Date: Jan 2007 Location: vernon b.c. Posts: 3,022	Re: Motor Flush. Good or bad? My nephew did the same on his jeep and wrecked the engine

01-29-2018, 05:11 PM	#4
61_FL_Apache Who Me? Join Date: Sep 2010 Location: Royal Palm Beach, FL Posts: 4,065	Re: Motor Flush. Good or bad? Good enough advise for me.. Thanks guys!! __________________ Steve 1997 Tahoe LT 4D 2WD (DD) 1961 Apache 10 (sold) 1965 C10 Stepper (sold)

01-29-2018, 05:20 PM	#5
retrax Registered User Join Date: Oct 2017 Location: St. Paul, MN Posts: 44	Re: Motor Flush. Good or bad? So these are products that go in the engine oil, versus coolant flush products?

01-29-2018, 11:41 PM	#6
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,178	Re: Motor Flush. Good or bad? Usually all the crud comes off and clogs the oil pick up.

01-30-2018, 03:17 PM	#8
G8rN@te61 Senior Member Join Date: Oct 2017 Location: Fort Mill, SC Posts: 203	Re: Motor Flush. Good or bad? Ive never had a problem. You just have to change the oil right away. Other wise the sludge, if excessive, can clog your filter and thus starve engine of oil. You can also do it slowly and run some high mileage oil with detergents in it and change oil sooner. I also put some seafoam in my oil a few days before I plan to change oil so it assists in cleaning it out. Too much sludge slowing oil flow can burn up piston prematurely.

01-30-2018, 03:24 PM	#9
Old Truck Man Registered User Join Date: Feb 2014 Location: Pocahontas Arkansas Posts: 684	Re: Motor Flush. Good or bad? better to pull the oil pan valve covers and intake and physically clean everything. Why take a chance of circulating all that crud thru your engine? The pictures are of a Tractor oil pan. But ive seen a number of engines of all types with similar gunk. I cleaned the sludge and regasketed the tractor engine. Its now back in service running great. Attached Images



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