I was wondering if I should use a particular radiator sealant with my ranger. I have heard good things about Bar's leaks block seal and heard negative stuff about alumaseal. I would like to try this for my very minor drip before I look into plugs.

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1998 xlt 4.0 V6

Use none of it. Replace the radiator!

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(Formerly)
FireRanger
2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide

this

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2021 F150 5.0 Screw

Past:18 F150 2.7, 16 F150 5.0, 14 F150 5.0, 07 F150 5.4, 03 Ranger 4.0

Master Certified Ford Parts / Warranty Admin

Yeah, I will agree on this point, repair or better still replace the radiator.

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2002 Edge Super Cab 3.0, 2wd, air box mod ,3.73
L/S,Torsion Lift, 31x10.50x15 Tires, Leer Bed Cap

Id replace the radiator, ALSO, Some plastic side tank radiators will leak some in the cold weather. A girl I used to date had a mercury sable and for like 5 years it leaked, but by spring, it was not leaking again.

I wont use the leak stops, too cheap of a fix, and that stuff goes into your engine as well, and you want those small spots thru the engine to be open, not closed up. Radiators arent hard to change either. I am sure you can find a write up or video on the net if not thru this site.

do not use any of it

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2005 Ford Ranger 4.0L 5spd 4x4
305/65r17 Baja Claw TTC, 17x8" Black Teflon AX188 wheels, 130w KC Daylighters, Custom Built Bumpers, Red Top Optima, RS9000XL Shocks, Torsion Bar Lift, Add a leaf rear springs, 3" PA bodylift, Pioneer DVD/CD Player, JL Audio 1000w Amp, Two 12" Type R Sub's, Polk Audio Door Speakers, Open 8.8 4.10's, Flowmaster Super 44
2001 Harley Davidson Dyna Lowrider 107ci

What everyone else said X1000! Radiator stop leaks are bad news for the cooling system, especially the heater core and they rarely stop the leak.

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yep. only use stop leak as a last resort and not on a car you plan on keeping. with that being said i had an escort with a leaking head gasget. i put some old time stop leak in and it slowed the leak almost to a stop. but i sold that car several months later.

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1998 ranger extended cab, 2wd, 4.0 ohv, 5 speed, sony xploid 52 4 way watt radio, 2 pair of pioneer 240 watt speakers, Cobra 29 LX LCD CB radio pushing 100 watts, k&n air filter, 15 inch exploder wheels, dual exhaust with 4 inch stainless tips, 2 12 inch subs with a 1000 watt amp just for the hell of it!

new project: dirt track modified racing at the local saturday night track.

Thank you all for your suggestions! I will not use that stuff at all. My radiator is fairly new, so it was probably the cold weather. It was just a few drips that periodically appeared.

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1998 xlt 4.0 V6