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Thread: LNF (in another vehicle) Cooling system question

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    LNF (in another vehicle) Cooling system question

    Hi ecotec gurus,
    I have a 2008 HHR SS engine in a BMW E36. It is a lot of fun.
    Recently I replaced my broken BMW heater control valve with a working one. Now when I turn the heater down and it stops the flow of coolant through the heater core, the engine temperature goes way up. Turn the flow through the heater core back on, and all is well. I don't get it. I'm not even running the heater fan, so it is not dumping much heat in the heater core, so what is going on?

    Thanks for any insight you can offer,

    jtb
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    It should not be a problem as you can replace the thermostat housing with an aftermarket and delete the heater loop completely.. http://store.custombuiltmotors.com/e...eck-block.html I removed the pipes on mine ad tapped threads in for an after market temp sender and pressure sender and there are no problems.

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    It should not be a problem as you can replace the thermostat housing with an aftermarket and delete the heater loop completely.. http://store.custombuiltmotors.com/e...eck-block.html I removed the pipes on mine ad tapped threads in for an after market temp sender and pressure sender and there are no problems.
    Brett85p Quoted Post
    Thanks! I am running CBM's remote oil filter adapter, but I didn't know they had this. I'd like to retain the heater (this is a street car), but if I can't get the stock stuff to work together, this will be a good back-up plan.

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    btw do you have a build thread on this car at all
    It's a pretty cool swap. I have an L61 Ecotec in my 78 Celica and my brother put a supercharged L61 in his Miata, both cars are raced in 24 hours of Lemons.

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    I have an L61 Ecotec in my 78 Celica and my brother put a supercharged L61 in his Miata, both cars are raced in 24 hours of Lemons.
    Brett85p Quoted Post
    Those both sound awesome. I really like the old celicas.

    There's a brief build thread here:
    http://www.bimmerforums.com/forum/sh...into-E36-318is

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    Gamertag: slowcavld9 PSN ID: mdz24cavalier
    I do not think you have everything plumbed correctly. You should have a 4 way diverted valve in line with the heater core, and not a 3-way valve.

    You need to have constant flow on that loop, and you do not with your current setup.

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    I do not think you have everything plumbed correctly. You should have a 4 way diverted valve in line with the heater core, and not a 3-way valve.
    -MD- Enforcer Quoted Post
    Aha! that would explain it. If I am understanding what you've said, the valve would either direct flow to the heater core (A) or a bypass loop (B) like in this picture
    heater.PNG
    You need to have constant flow on that loop, and you do not with your current setup.
    -MD- Enforcer Quoted Post
    Why would you need constant flow? Are these two hoses not on the same side of the thermostat?

    Thanks for the response!

    jtb

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    Gamertag: slowcavld9 PSN ID: mdz24cavalier
    GM designed it to have constant flow. Not 100% on the LNF motor flow.

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