yamaha894racer

So I have been dealing with a slightly clogged heater core and have minimum heat. I can flush it and will have heat for a week but then it goes back to minimal heat. As money is tight I can't afford to keep doing a flush for it so just wondering if I can reverse the flow in just the heater core to help back flush and break lose what ever is clogging it and then flush the whole system to get what breaks lose out?

cacric

You ever put Bars Leak in it?

13Harleyfan

Where is all the trash that you break loose from the heater core going to go. If the heater core keeps building up with trash try flushing the block out. Sounds like a new heater core might be the best solution. Check the basics, t-stat working correctly, lower hose not collapsing, radiator cap holds pressure and is the correct one for your cooling system. Good luck.

jmburton1993

Have you just flushed the heater core itself? I had similar problems and disconnected the hoses from the engine to just flush the core did the trick

KentuckyCountryBoy

I did that on my old truck. I had no heat at all. Unhooked the hoses from the motor and used a garden hose to flush them. Had to keep reversing the direction until it flowed clear both ways. Had good heat afterwards.

yamaha894racer

No iv never put any type of leak fixer ir what ever you want to call it in there like bars. But all the basics are good the only one I'm not sure about is the fan clutch.because when ideling my temp drops about a 1/4" on the temp gauge till I drive and power the fan I think to warm it up. I also have flushed just the heater core 3 times now, where I back flush then flush with the flow then back flush again. I also use a special flush tool that you set to say 15 psi and you can blast water through with air to help unblock it. I think I'll have to just really flush the block then back flush the radiator and such and throw a new heater core in. About how long has the heater core taken? Is it do able on a Saturday? I have a full set of tools and air tools so having the right tool is not a issue. Thanks guys

Frank_Ford

I agree with the guy who says that you need to flush the complete system especially the block. Take out the plugs in the block to make sure you get all the debris out because you are most likely getting the debris from your cooling system back in the heater hoses and core after you flush out the core.

yamaha894racer

i have flushed the whole system before but any tricks or cleaners that you guys use other than what has already been said?