What is the best raditor flush? Is it better to have a garage power flush it?
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Supreme Member


Joined: Jan 2000
Posts: 1,123
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From: jeff NY usa
Car: 86 Z28
Engine: 350
Transmission: W/C T-5
Axle/Gears: 9 BOLT 3.45 POSI
What is the best raditor flush? Is it better to have a garage power flush it?
I have a build up inside my raditor and I want to get it out. thanks
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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Moroso Blue max wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.
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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Moroso Blue max wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.
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Joined: Jul 1999
Posts: 112
Likes: 1
From: Sudbury, Ontario, Canada
Car: 1988 IROC-Z
Engine: 350 TPI
Transmission: WC T5
I wouldn't recommend "power" flushing your coolant system unless it is absolutely necessary. My car was overheating, so I figured I would have my system flushed out to see if that would cure the problem. After I had mine done, my heater core went. It turned out that I didn't need the flush after all. The problem turned out to be that my rad cap wasn't maintaining the proper pressure
I like prestone super flush to CLEAN the system. It will not clear blockages or eliminate years of buildup from neglect.
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82 z28 350cid, vortec heads, comp 262h cam, Holley 600cfm carb, 2in twice pipes, MSD ignition, turbo 350 trans, 3.73 posi
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82 z28 350cid, vortec heads, comp 262h cam, Holley 600cfm carb, 2in twice pipes, MSD ignition, turbo 350 trans, 3.73 posi
a power flush is the shop draining your coolant and sticking a garden hose in your radiator...don't bother with that crap...
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-'82 Z28
-355 carb'd, super comps, 4.10, 3" duals
AIM me at: Unitedhope
ICQ me at: 77979548
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-'82 Z28
-355 carb'd, super comps, 4.10, 3" duals
AIM me at: Unitedhope
ICQ me at: 77979548
Thread Starter
Supreme Member


Joined: Jan 2000
Posts: 1,123
Likes: 0
From: jeff NY usa
Car: 86 Z28
Engine: 350
Transmission: W/C T-5
Axle/Gears: 9 BOLT 3.45 POSI
I change my coolant 0nce a year, it is not like I don't take care of it. The rad is only 4 years old to. It has a hard build up of some white stuff in it and i am not sure what it is, is there anythign I can put in to prevent it.
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Joined: Apr 2000
Posts: 1,338
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From: Chander, Arizona USA
Car: 2006 Silverado 1500
Engine: 5.3L
Transmission: 4L60E
best stuff i've used is this two part prestone stuff we use at work for the bulliten on the blazer's with coolant turning solid. works excellent. but as has been said, if you have any leaks it will be very noticable after you flush it.
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Best way to flush is to install a flushing T in your heater hose which allows you to back flush the system. Follow instructions on package. Regardless of the flushing agent used, the hardest part is to make sure all of it is out of the system, meaning alot of final flushing with water. To minimize further scale deposits, mix your antifreeze with distilled water instead of tap water. You'll never totally prevent the white deposits from forming. I can't remember for sure, but besides being scale deposits, it could also me solder bloom, which is a reaction of the coolant to the solder in the radiator.
Regards, FJK
Regards, FJK
Mine was all rusty and thn I put some flusher in it, let it run for a while so I knew it was out, then I clenaed it all out and it was perfect. Just remove teh upper radiator hose, take the cap off and run the engine wiht a hose stuck in the radiator carp hole. Dont worry about it overheating, it actually runs quite cold. But you do want to heat the engine a bit. Wait till you can only see clear water coming out of the hose. The nput your flush in according to the directions and it should be good as new and run much cooler.
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89 camaro 305 tbi, flomaster 3 chamber cat back, gutted cat, Edlebrock open element, 2 kicker comp 12"'s, polk for the rest. Phoenix gold xs2300 to subs, kicker impulse 404XI to 4 speakers, pioneer DEH- P7000R head unit, and finally a 12 disc changer. Full leather interior from MrMikes.com
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89 camaro 305 tbi, flomaster 3 chamber cat back, gutted cat, Edlebrock open element, 2 kicker comp 12"'s, polk for the rest. Phoenix gold xs2300 to subs, kicker impulse 404XI to 4 speakers, pioneer DEH- P7000R head unit, and finally a 12 disc changer. Full leather interior from MrMikes.com
Black,
Zippy and FJK have the right idea. Prestone used to market a kit containing a flushing 'T', acidic cleaning agent to remove the scale, a neutralixer to keep the acid from destroying the gaskets and castings, and fairly explicit instructions, which inluded removing the thermostat and reverse flushing with plenty of water. If you have excessive mineral deposits, follow FJK's advice and remix with distilled or deionized water.
FJK - looks like Jefferson is a wash today. There is a chance of T-storms with light hail moving right through the area later today. Seems like this happens about every other year...
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Later,
Vader
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"Make Me Bad"
Adobe Acrobat Reader 4.0
Zippy and FJK have the right idea. Prestone used to market a kit containing a flushing 'T', acidic cleaning agent to remove the scale, a neutralixer to keep the acid from destroying the gaskets and castings, and fairly explicit instructions, which inluded removing the thermostat and reverse flushing with plenty of water. If you have excessive mineral deposits, follow FJK's advice and remix with distilled or deionized water.
FJK - looks like Jefferson is a wash today. There is a chance of T-storms with light hail moving right through the area later today. Seems like this happens about every other year...
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Later,
Vader
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"Make Me Bad"
Adobe Acrobat Reader 4.0
Forgive me guys for using this post for a little note to Vader.
Hey, I was there at 7am & let me tell you the dogs are barking now. I forgot how they changed the fairgrounds & though main building....????.. that leaves too much to interpretation. I probably should have said "Sheep". Well, maybe next time.
Regards, FJK
Hey, I was there at 7am & let me tell you the dogs are barking now. I forgot how they changed the fairgrounds & though main building....????.. that leaves too much to interpretation. I probably should have said "Sheep". Well, maybe next time.
Regards, FJK
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