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  #1  
Old November 23rd, 2015, 09:39 AM
alchamisto
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1990 D110
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Heater Plumbing

Hi !

I just retrofitted a Summit Racing 3 stage heater to my 110 and prior to that there was the dinky stock one but not plumbed up. I cant find a diagram that shows me the flow ie manifold to heater core and return to pump - i have a bypass on there there now (manifold to water pump) and the second nipple on the back of the water pump is caped. I was also thinking about about installing cut off valve to the firewall for the summer as there is no longer a gate to keep hot air from being pushed into the duct work - but am not sure if it need to be a bypass valve or can i simply cut off water to the core in the summer ! thanks
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  #2  
Old November 23rd, 2015, 09:53 AM
alchamisto
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1990 D110
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Wow yes I just went Full Ret*** - I am running a 3.5 L w a 3.9 EFI

I removed the top of the heater box as if i were changing the heater core ( rivet removal) and then wrapped that piece after some sharp bends right over the aftermarket heater - then sealed the gaps ( very small i was just being anal) w fireplace sealant 2000 degree rating ( in case i decide to hot smoke a buffalo ) - the motto is so strong its puling heat off the engine when hot enough warming the cab currently but am sure once the really cold weather rolls around ill need the core in action
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  #3  
Old November 23rd, 2015, 09:57 AM
alchamisto
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Some more pictures pre sealant an install and final assembly ( sanding and respray) - sits like a stock unit would. minus the gates and i think a cut off valve is in order using the existing dash controls.
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  #4  
Old November 23rd, 2015, 10:23 AM
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Looks good but please say you have a fresh air intake hose fitted some how?
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  #5  
Old November 23rd, 2015, 10:29 AM
alchamisto
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1990 D110
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funny you should ask that.. from the pictures the intakeS look almost mated up and this was a major concern for me - Ive run the truck intermittently on off and highway and it is doing great BUT yes I've just got a new snorkel in the mail and will be hooking it up shortly.
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  #6  
Old November 23rd, 2015, 10:32 AM
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He means for the heater, not the engine.
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Old November 23rd, 2015, 10:37 AM
javelinadave
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You need a source of fresh air to the heater. If not your project could become lethal.
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Old November 23rd, 2015, 10:42 AM
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I have a larger heater, but the install points are similar. I used a coolant valve to control the heat output. Have a look at what I did for some ideas. Also shows how I ducted the intake.

Land Rover Defender Heater Upgrade - Page 1
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  #9  
Old November 23rd, 2015, 01:37 PM
alchamisto
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Red90 - thats a awesome build but way more involved than what I did as my skill set is not as advanced - thank you for sharing.
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