My friends 89 iroc has a slight leak coming from his heater core, you can see it is a little mosit on the bracket got wet just a little damp, You can smell it somtimes to, do you think that bars leak would help it, if so how long does it last? does it affect cooling? just it clogg the system? thanks alot

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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.

 

It works but its a temporary fix.

It'll eventually start to fog up the window in the morning (and that stuff doesn't just wipe off!!) and leave puddles on the floor.

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ASE Mechanic/Machinist/Smog Tech

RTKTGTR 1999 NBM T/A, flowmaster,FRA,Pro Kit,BMR STB, polished calipers.
1986 Chevy 3/4 ton pick up,flowmasters,4.10s,
1981 corvette FOR SALE
1995 ZX6R,Yosh,D207s

GO #3

 

BZ,

I've never had much luck with Bars Leaks, Solder Seal, Silver Seal, or ANY of the leak-stopping additives. For about $20.00 you can get a replacement heater core and solve the problem effectively and "permanenetly".

Later,
Vader

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"Stop it - or we'll go blind!"

 

Anyone else?

 

I used Bars Leak to stop pin hole in radiator,worked great on pinhole but blocked heater core. Ended up replacing rad. & heater core.

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86 IROC mods:T.E.S.,Flowmaster muffler
T.P.I.S. airfoil,ported plenum,March
pulleys,Accel 8.8wires,supercoil,ign.mod.
RAM AIR induction,gutted MAF,
B&M shift kit,3.73 rear gears,Accel afpr,Hypertech stage 2 chip,Random Tech.cat.,Lakewood lower control arms,Lakewood adj.panhard rod
"The more I learn about women,the more
time & money I spend on my IROC"

 

I'm with IROCZ on this one. Years ago, I too used Bar's Leak on a pin hole in my rad. I did work until I had my coolant system flushed a year later. I proceed to add more Bar's leak, but this time is clogged my coolant system and I had to change both my rad and block heater. Moral of the story, save a few pennies now and pay big time later. Do as Vader said.

 

What about the gm sealent tabs?