Auto Repair & Maintenance : How to Seal a Car Radiator

A car radiator can leak in the tank, the core or in the radiator hoses, and a crack in the aluminum or plastic parts can't typically be repaired. Learn about fixing a leaking radiator along the seam with help from an ASE-certified master automobile technician in this free video on car radiators.

Expert: Clark Mason
Bio: Clark Mason is an ASE-certified master automobile technician.
Filmmaker: Christian Munoz-Donoso

Category:

Autos & Vehicles

Tags:

• auto
• repair
• car
• maintenance
• starters
• antifreeze
• transmission
• oil
• changes
• diagnose
• problems
• electrical
• radiators
• fuel
• injectors
• brakes
• carburetors

[RobertLaPlante1]

thanks for your video

[geoffreydrifts]

jb weld or buy a new one

[bludevil3269]

I have A leak in my radiator in the upper (R) side (installed). I have used aluma seal but the hole is to big to plug this way . can some one offer some good advice.

thank you

leaky blazer

[tytytyler87]

@shizty98 I appreciate the insight, but I don't think the insult was necessary.

[Evo10Rocks]

mine is leaking from the right side in the bottom :(

it doesnt leak much just a little bit but the water is kinda hot.............

will that liquid help?

[yoshiman805]

plastic radiators are crap... nothing like the old brass and copper.

[mwngw]

good info., well explained. For cracks in the top plastic have you seen replacement brass top sections? Seems like a novel idea, but I wouldn't know how to get the top section off. Thanks again.

[cycloneCJproducts]

@yertle406 your best bet is to save or spend the money and just get a new one! all that crap is just that ............CRAP!

[yertle406]

Can you solder an aluminum radiator on the trays? Or use JB weld?

[shizty98]

I dont know where they found this guy but he does not know what hes talking about. He's probably a shadetree mechanic or something.

Im a radiator repairman and I can tell you that a plastic alluminum radiators are repairable 90% of the time. The way we repair "craked tanks" is by replacing the tank with a new tank, not welding it like he says or putting epoxy on it. And Repairing leaks in the core are easily welded. U never want to pour anything in ur radiator thats not water or coolant.