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01-06-2012, 08:34 PM
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#1 |
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Registered User
Join Date: Dec 2011
Location: Kansas City, Mo
Posts: 160
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Motor Flushing
Ordered a new aluminum radiator for my 66 and after pulling the old radiator out and seeing all the rusty dust in the hoses and some near the water pump, I'd like to flush the thing out before I put in the new radiator. What is the best way to go about this? Any input is appreciated. Have a great weekend!
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01-06-2012, 08:55 PM
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#2 |
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1 thing at a time is progress.
Join Date: Jun 2007
Location: Ball Ground GA
Posts: 5,511
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Re: Motor Flushing
Moved ya to the engine section for more feedback.
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Alan
Philippians 2:14-16 |
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01-06-2012, 08:56 PM
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#3 |
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Registered User
Join Date: Nov 2011
Location: Hutto Texas
Posts: 114
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Re: Motor Flushing
There is only one way to backflush your system, remove thermostat housing and also bottom radiator hose, affix a water hose with air hose if equiped and blow both water and air through the bottom hose outlet up through the motor, it would help if your engine is kinda warm and use a good detergent prior.
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01-07-2012, 05:52 AM
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#4 |
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Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
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Re: Motor Flushing
In addition to what purebred said, it's a big help if you can remove the block drain plugs which are near the bottom of the block. That is where heavy stuff settles. Better assured you get everything out of the block that way too.
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1969 c-10 Step Side Long Bed. I-6 250cid =  = 1969 Pontiac GTO hard top. 400, 4-speed.
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01-08-2012, 10:41 PM
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#5 |
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Registered User
Join Date: Aug 2009
Location: St. Paul MN.
Posts: 1,996
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Re: Motor Flushing
I have used this stuff and it removes rust. If i remember this is the stuff GM uses to remove rust on the 2.8 and 4.3 v6 that had a casting sand problem
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Fuzzy |
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12-02-2013, 12:19 AM
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#6 |
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Registered User
 
Join Date: Jun 2009
Location: ALASKA
Posts: 48
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Re: Motor Flushing
Hey guys,
I have this same question with one exception: my radiator has a large crack which only allows me to fill it half-way. I am going to replace it with a new aluminum radiator, but want to flush the block prior. I would like to do a good job at flushing the block before installing the new radiator. It seems that it would be best to run a cleaner and warm up the block before flushing. But I have already got my rad removed. Should I re-install my old rad. fill as much as it will hold (about 1/2) run some type of good cleaner and then flush the block? *Also I don't know when the last time the system was flushed, but I know it's been at least 12 years.
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1991 Chevy K10, 4x4 ______ Past Rides 1971 Chevy C20 Longhorn (6.6L, 402c.i.); 1973 Chevy K20, 4x4, std. cab, longbed (5.7L); 1979 Chevy Corvette (5.7L); 2001 Chevy Xtreme S-10, ex-cab, 5spd. (4.3L); 2001 Chevy Silverado 2500HD, 4x4, ex-cab, (6.0L); 2002 Chevy Silverado 1500, ex-cab, 4-6drop (4.8L); 2003 Chevy Silverado 1500, 4x4, std. cab, 5spd. (4.8L); 2004 Chevy Colorado Z71, 4x4, crew cab, (3.5L); 2006 HUMMER H3, 4x4, 5spd., (3.5L). |
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12-02-2013, 01:11 AM
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#7 |
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Registered User
Join Date: Dec 2008
Location: NW-Ohio
Posts: 2,525
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Re: Motor Flushing
When I had a problem, I ran a bottle of CLR and just water in the car for a bit.
Calcium Lime Rust All sorts of stuff came out. |
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12-02-2013, 10:15 AM
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#8 |
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Registered User
Join Date: Jun 2006
Location: Indiana
Posts: 4,859
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Re: Motor Flushing
My first thought was NO! Not even with a plunger!
 But your plumber would sure be scratching his head!
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'70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60 |
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