joom

How long did it take you to replace the heater core?

RDF1

Was the heater core clogged?

Go5.3tt06

iTrader: (1)

Gel built up, yes. It take me 4 hours to finish

Fullpower

........... It's a pretty involved project.
.......................... Book rate is 9.5 HOURS..... First time through will take you MORE than that.

1FastBrick

iTrader: (17)

Here is a GMT 800 step by step video. This will show you whats involved step by step.

MikeGyver

iTrader: (5)

I stayed in post #10 that I had help replacing my heater core but I forgot to say how long it took.

It took us about 4 hours to finish, but it also took about 2 hours to start.
So two guys, one under the hood who needed instruction, about six hours.