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Author
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Topic: What is a good way to flush the oil systen?
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BaLleRz68
Gearhead Posts: 104
From: Bay Area, CA
Registered: Aug 2002
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posted 12-27-2002 04:38 AM
   
I bought this stuff called "Gunk motor flush," Is it any good? Are there any products worth buying to flush the oil system? Are there any precautions or certin procedures I should do? Any thoughts are appreciated. THanks.
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soaring
Gearhead Posts: 116
From: New Mexico
Registered: Nov 2002
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posted 12-27-2002 05:19 AM
Since I am not familiar with that product, nor have I read the ingredients, I cannot qualify its' use. However, most motor flushes contain some kind of distillant which melts the old oil into the bottom of the pan. What I have used for many years is Diesel. I drain the engine of all the old oil, then fill the engine with diesel, then drain that. After that, I take off the oil pan and wipe it completelely clean before putting a new gasket back on and refilling with good oil and replacing the filter.
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SteveLaRiviere
Administrator Posts: 34763
From: Saco, Maine
Registered: May 99
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posted 12-27-2002 08:04 AM
You don't. In your oiling system the LAST thing you want is grit floating around, or sludge semidissolved and migrated to narrow orifaces and plugging.Aside from increasing the frequency of oil changes, I wouldn't tempt fate like that. ------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150 Be sure to remember our sponsors, Mustangs Plus, NPD, and Osborn Reproductions.
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V8 Thumper
Gearhead Posts: 3603
From: Orange, Ca. United States of America
Registered: Dec 2001
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posted 12-27-2002 08:39 AM
I agree with Steve... it sounds dangerous and questionable.I've been a religious 3000 mile oil changer since I was a kid, but I understood detergent additives in motor oil to act as a full-time 'flushing' agent anyway  ------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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Moneymaker
Administrator Posts: 19964
From: Lyons, IL, USA
Registered: May 99
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posted 12-27-2002 11:06 AM
I've used the Motor Flush product with a lot of success many times. I only use(d) it on "OLD" gummed up engines that have sticky lifters and mud in the crank case. It's a combination of diesel fuel and reducers. Year ago at the dealerships we used laquer thinner to fluch out gummed up GM engines.  ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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69 Sportsroof
Gearhead Posts: 1226
From: Valley, Alabama, USA
Registered: Mar 2002
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posted 12-27-2002 11:54 AM
I use Gunk motor flush only one time on any engine that is suspect in its maintenance history. After that, if the oil is changed like it should, you dont need it. When I got my mustang, I drained the old oil, put in 5 quarts of wal-mart oil and one quart of gunk. Spun the oil pump with a speed wrench until oil flowed though the rockers then fired up the engine for about 5 minutes and then drained the oil and refilled with good oil.
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Moneymaker
Administrator Posts: 19964
From: Lyons, IL, USA
Registered: May 99
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posted 12-27-2002 12:24 PM
That's why they call it 5 minute flush. ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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n2oMike
Gearhead Posts: 1641
From: Spencer, WV
Registered: Jan 2001
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posted 12-27-2002 01:34 PM
Some people pour it into their crankcase along with their old oil and run it for the five minutes to flush out any deposits.I just make sure my oil is nice and hot before draining it. As for gunked up engines... you stand more of a chance of breaking off a piece of crud and lodging it in an important place.... as you do of doing something positive for the engine. In other words, unless something is clicking or noticably lacking of oil, the safest bet is to leave it alone. Good Luck! ------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
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mustangs68
Moderator Posts: 18494
From: Hampton,Virginia,USA MCA#39406 M&M #12
Registered: May 99
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posted 12-27-2002 03:25 PM
The Mechanical Operations Manager swears by Kano Kreen..this stuff and it's sister products will clean anything.I saw him clean an old 302 with 200,000+ miles on it..the heads were gunked up to the rockers and when finished you could eat off them..no joke!http://www.thomasregister.com/olc/kano/kanoec.htm
sam
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BlueMule
Gearhead Posts: 1058
From: Kent Island, MD USA
Registered: Sep 2002
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posted 12-27-2002 03:32 PM
quote:
Originally posted by mustangs68:
The Mechanical Operations Manager swears by Kano Kreen..this stuff and it's sister products will clean anything.I saw him clean an old 302 with 200,000+ miles on it..the heads were gunked up to the rockers and when finished you could eat off them..no joke!
was the 302 above assembled and running or was it used to soak sub-assemblies?
------------------
-Paul 70 Mach1 351C
79 Ranchero GT
97 Expedition XLT 5.4
00 SVT f150 Lightning 4149 of 4966 Born on: 06/26/2000 'life's tough... it's tougher if you're stupid.'
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SteveLaRiviere
Administrator Posts: 34763
From: Saco, Maine
Registered: May 99
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posted 12-27-2002 03:35 PM
If you've ever taken off old engine bearings and seen what kind of damage a single speck of dirt can do, I can't see why you would want to knock them loose and run them through your oiling system. ------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150 Be sure to remember our sponsors, Mustangs Plus, NPD, and Osborn Reproductions.
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70SportsRoof
Gearhead Posts: 854
From: Glendale, AZ...soon Orange County, CA
Registered: Dec 2001
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posted 12-27-2002 05:12 PM
We ran soem of that flushing crap through our old '88 Bronco II, and the stuff dislodged soem grit and crap and all that stuff ended up getting caught up in the oil pickup, clogging the screen. If you're engine is really gritty and crudded up, I'd advise against it. But best thing you can do is change your oil every 3,000 mi or 3 months to keep everythign clean and fresh. After all, oil is the lifeblood of your engine, and the cheapest thing you can do to prolong it's life.------------------
Gary M.-
1970 Mustang Deluxe SportsRoof (daily driver), 1946 Ford pickup, 1947 Ford pickup, 1957 Ford Fairlane 500 Town Vic
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Moneymaker
Administrator Posts: 19964
From: Lyons, IL, USA
Registered: May 99
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posted 12-27-2002 06:41 PM
The stuffs in tended use is to unplug oil passages. Years ago,before high detergent oils, especially on engines with rocker arm shafts, the oil feed holes easily became plugged with sludge. The 5 minute flush helped disslodge the gunk so oil could flow back up to the top of the heads.
Also, V-8 Pontiacs, Oldsmobiles, and Buicks were notorious for geting crap in lifters and sticking.
Of course the best action is to change oil often. But when the damage is already done, the 5 minute motor flush works wonders. ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Mpcoluv
Gearhead Posts: 1004
From: Charlotte NC usa
Registered: Apr 2001
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posted 12-30-2002 09:10 AM
Since no one mentioned this, I thought I would....
My dad used to used 2.5 quarts of fresh motor oil and 2.5 quarts of kerosene to flush out old engines that had the parafin based oil buildup.
Ran at idle for 5 minutes, and drained.
Never seemed to hurt anything, and worked wonders for a 401 nailhead buick one time.
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mustangs68
Moderator Posts: 18494
From: Hampton,Virginia,USA MCA#39406 M&M #12
Registered: May 99
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posted 12-30-2002 09:36 AM
That old truck was running and never taken apart..but he did use 2 cases of oil and a bunch of filters..it's still running today and this was at least 10 years ago.If I remember he brought the motor to operating temp then removed the oil/filter then added a 50/50 mixture and ran the motor for about 5 mins the let it set for an hour-repeat several times,I was relly surprised how well it work..I wouldn't do this to a "good" engine but this old truck had the heck beat out of it and he didn't want to put a pile of money in it just for a junk hauler.
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Hell_Fish
Gearhead Posts: 680
From: Austin, TX.
Registered: May 2002
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posted 12-30-2002 11:32 AM
I had a buddy of mine use some of this type of stuff in his import because the guy at the oil change place told him he needed it. Well, it cost him an engine a few chunks clogged up a few oil passeges and it burned up. Be careful and watch your gauges like mad after you use it.
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Moneymaker
Administrator Posts: 19964
From: Lyons, IL, USA
Registered: May 99
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posted 12-30-2002 11:43 AM
The stuff worked great on just those types of older engines. Buick 401 and 425, Pontiac V-8's, Olds V-8's, Caddy V-8's, and any shaft rocker FoMoCo. ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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AH Guy
Journeyman Posts: 17
From:
Registered: Jul 2002
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posted 12-30-2002 01:45 PM
I have used the Amsoil engine flush. Afterwards, when I wiped off the drain plug, it was so clean it looked like it had been chromed. I've done this in some very high mileage Ford and Chrysler engines and have never had a problem. If you do this, make sure you follow their instructions and use a really good filter, not a cheap Fram or something.
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Toronado3800
Gearhead Posts: 364
From: St. Louis, MO
Registered: Jul 2001
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posted 12-31-2002 10:20 PM
When I first got my Oldsmobile I wasn't happy with how unclean new oil looked in it right after I changed it so I changed my oil again after only 700 miles or so. Then I did it again after only about a thousand miles. Things started to look pretty good and the new oil stayed looking good for some time, then I changed it. And I avoid Synthec because I never want to have to put off an oil change until I have the money. Really, I'm not a fan of tranny flushes or motor flushes. I figure all them "dirt eater" chemicals also eat gaskets and sealers.
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