3rd Heater Core Plugged In 6 Months...

Checked their website and says it only applies to vehicles with less than 160,000 km
The seems right from what I remember.

I ended up getting stuff fixed that was out of warranty just telling Honda Canada I was going to file a complaint a few times.

2001 Honda Civic was notorious ( first model that ditched double wishbone suspension and went Macpherson struts ) for front struts that kept leaking and having to be replaced.

Also, 2006 Civic was known ( but I was one of the first because I rack up milegage so fast ) to have engine failures caused by a porous engine block that leaked all the coolant out while driving and ruining the engine. My engine "blew" just outside the main warranty and I got it replaced ( at first they said no ) with a new short block. Later, Honda extended the warranty on the engines.

FYI: I just had my heater core flushed because of low cabin heat but the car has around 550,000 KMS ( fixed the problem ). Not sure why it needed flushed because the coolant ( and I don't mix coolant ) has been regularily serviced. What a big job it is to rip the dash apart to replace them if they need to be replaced.
 
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Should have seen what came out of the first coolant filter I installed between the heater hoses on my (neglected) IAT green running '89 F-450 7.3 in my sig... Multiply by at least 20!
 
Coolant filter base
Wix 24019 / NAPA 4019

Filter
Small 24069 / 4069
Large 24070 / 4070

Stay away from 24071-75, these have additives in them.

I plumb it into the cabin heat feed line…
 
I doubt the heater core is plugged, why would the core only get plugged? A blown head gasket is more likely the issue, it allows air to enter the coolant system to the point the heater core air locks and no longer heats.
The heater in my wifes truck stopped working so I researched forums and discoverd a lot of people were replacing "plugged" heater cores in her year of truck. I removed the hoses serving the core in the engine bay and flushed water through it and there was no blockage. I then tested the cooling system for combustion gases and bingo. I replaced the head gaskets a few years ago and problem solved.
 
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Coolant filter base
Wix 24019 / NAPA 4019

Filter
Small 24069 / 4069
Large 24070 / 4070

Stay away from 24071-75, these have additives in them.

I plumb it into the cabin heat feed line…
I assume this is a bypass setup, I already have a bypass filter setup installed. Or is this one a full flow filter?
 
I doubt the heater core is plugged, why would the core only get plugged? A blown head gasket is more likely the issue, it allows air to enter the coolant system to the point the heater core air locks and no longer heats.
The heater in my wifes truck stopped working so I researched forums and discoverd a lot of people were replacing "plugged" heater cores in her year of truck. I removed the hoses serving the core in the engine bay and flushed water through it and there was no blockage. I then tested the cooling system for combustion gases and bingo. I replaced the head gaskets a few years ago and problem solved.
Interesting, I thought for sure that the 4 plugged cores that have been pulled out and all the sand the filter has caught was a pretty sure sign of the problem but ya maybe it's been a bad head gasket this whole time...
 
-Install a full flow filter inline of the heater core but I would be worried about heater performance in very cold temps (sub -20), I guess I could have a bypass for really cold temps but now were talking more plumbing and space in the engine bay isn't unlimited.

I have the heater core inlet plumbed into a filter on my rusty Jeep coolant system. The heat feels the same but I cannot speak to -20 performance.
 
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