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I need to know how to bypass a heater all together for a isuzu jackaroo2001 3.5lr

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  • Isuzu Master
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Find the two hoses that go to the heater , disconnect from the heater core pipes ( normally in the engine compartment at the firewall) and place a joiner in the hoses and clamp up tight---
heater out of the circuit --

Posted on Dec 07, 2016

  • 1 more comment 
  • Michelle Reed
    Michelle Reed Dec 07, 2016

    at the firewall there was a corroded piece that come out of the firewall for the hose to clamp to and it was stuffed so a bloke clamped the hoses to get it home and was saying something about the intake manifold ?? and then it started leaking from the front near the radiater grrrr this would be cos he clamped those hoses right ?? so is it completely safe to just put an elbow in and direct the flow back >???

  • Michelle Reed
    Michelle Reed Dec 07, 2016

    thanks for your help Bill Boyde

  • Bill Boyd Dec 07, 2016

    corrosion in the cooling system is a fair indicator of a lack of anti-freeze/anti boil additive in the correct ratio
    all the aluminium parts including head cover behind the water pump, thermostat housing and hose fittings will all be in a bad state
    there will be blocked cores in the radiator as there will be deposits from the corrosion as well

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  • Isuzu Master
  • 20,706 Answers

Just loop the hose.
we;ve done this 50miles offroad, many times.
get a leak and we bypass. it
the heater core is just a loop
so if you shunt that, with out side loop, heat ends in the cab but
the leak ends. (core leaks or its hoses)

you need section of pipe, I used copper water pipe
and made a loop, (fittings)
and then disconnected the heater 2 hoses and connected them t
my loop
then waited 3 weeks for dealer to ship the core in from
farawaystan.
in the old days (even some in 1989) the heater was optional
imagine how that works.
you can even read the service manual or the parts lists and see how they did that.
i have 89 here, offroad car, that has no PS. no AC and no heater
that came new that way.
had a 64 Dodge that way too.

the only tricky part is matching the hose ID.
inside diameter, and how long you run it.
if short time PCV can work. not me but might.
on some cars just a long hose, makes the loop work
input to out put nippless....

Posted on Dec 10, 2016

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Posted on Jan 02, 2017

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