no rear heat

[shawnzy]

i have mitsubishi petro van/wagon very close to the delica without the bells and whistles but i have no rear heat i know about the settings floor for heat top for air, i have used the heat in the past ,with all the controls in the proper position and heat flowing up front still none to the rear, i have located the two hoses under the body feeding the rear core and both are cold to the touch. i am not familiar with make up for rear heat but i would assume that atleast one should be hot and the other warm on the return back to the rad and if the core was blocked one would be hot and the other cold. but for both to be cold i need help.

[Meanman]

on the left side of the engine near the rear you should see a T junction where the the front heater hose and rear heater hose connect to the block. Start tracing backwards towards the rear heater core. I had the same thing when I first got my van...turned out to be a clogged line. I replace all rubber hoses and all is warm and toasty now.

[FalcoColumbarius]

I would follow those hoses until I found: A/ where they are blocked or disconnected; B/ check my rad/water pump... For that matter it could be something like the rad cap have a crack in the seal thereby the cooling system not pressurising. Here is the Cooling System Manual from next door in "Delica Downloads":
http://www.delica.ca/forum/l-300-coolin ... -7336.html
Hope this helps, Shawnzy.

Falco.

[shawnzy]

I would follow those hoses until I found: A/ where they are blocked or disconnected; B/ check my rad/water pump... For that matter it could be something like the rad cap have a crack in the seal thereby the cooling system not pressurising. Here is the Cooling System Manual from next down in "Delica Downloads":
http://www.delica.ca/forum/l-300-coolin ... -7336.html
Hope this helps, Shawnzy.

Falco.

Thanks for the info i will try all the above hoping for just a clog

[shawnzy]

on the left side of the engine near the rear you should see a T junction where the the front heater hose and rear heater hose connect to the block. Start tracing backwards towards the rear heater core. I had the same thing when I first got my van...turned out to be a clogged line. I replace all rubber hoses and all is warm and toasty now.

Hope it is just a clog

[shawnzy]

I would follow those hoses until I found: A/ where they are blocked or disconnected; B/ check my rad/water pump... For that matter it could be something like the rad cap have a crack in the seal thereby the cooling system not pressurising. Here is the Cooling System Manual from next door in "Delica Downloads":
http://www.delica.ca/forum/l-300-coolin ... -7336.html
Hope this helps, Shawnzy.

Falco.

would there be a valve that allows the hot water to flow or is a straight out of the block and thre the core

[FalcoColumbarius]

Don't know, I'm a painter. My previous post is based on my personal logic. I was composing the post at the same time as Meanman was composing his post ~ he works on machines for a living, I have been learning about my Delica in my spare time.

According to page 14-13 of the cooling system manual (from the link in my original post) it shows two hoses running off the cooling system. I would think this is the "T" junction that Meanman was alluding to.

Falco.

[loki]

I would follow those hoses until I found: A/ where they are blocked or disconnected; B/ check my rad/water pump... For that matter it could be something like the rad cap have a crack in the seal thereby the cooling system not pressurising. Here is the Cooling System Manual from next door in "Delica Downloads":
http://www.delica.ca/forum/l-300-coolin ... -7336.html
Hope this helps, Shawnzy.

Falco.

would there be a valve that allows the hot water to flow or is a straight out of the block and thre the core

no valve

[shawnzy]

I would follow those hoses until I found: A/ where they are blocked or disconnected; B/ check my rad/water pump... For that matter it could be something like the rad cap have a crack in the seal thereby the cooling system not pressurising. Here is the Cooling System Manual from next door in "Delica Downloads":
http://www.delica.ca/forum/l-300-coolin ... -7336.html
Hope this helps, Shawnzy.

Falco.

would there be a valve that allows the hot water to flow or is a straight out of the block and thre the core

ok i have the talivan running and we are at full heat up front i found the T you were talking about the hoses and the T are super hot but the two hoses leading to the back are cold right at the T does this sound like a blockage at the T and should i flush from the T to the rear or back flush from the rear to the T

[loki]

should i flush from the T to the rear or back flush from the rear to the T

try to determine the direction of flow, then flush in the opposite direction, if that doesn't work, go the other way :) you can likely figure out the direction of flow by following the heat from the engine, an infer-red temp gun would really help with this. disconnect the hoses when you trying to flush the blockage to avoid breaking anything and/or forcing the blockage into the heater core or up into the block or something nasty

[shawnzy]

should i flush from the T to the rear or back flush from the rear to the T

try to determine the direction of flow, then flush in the opposite direction, if that doesn't work, go the other way :) you can likely figure out the direction of flow by following the heat from the engine, an infer-red temp gun would really help with this. disconnect the hoses when you trying to flush the blockage to avoid breaking anything and/or forcing the blockage into the heater core or up into the block or something nasty

well i think i narrowed it down to a cloged rear core i tried blowing thru one side of the core and nothing went thru no does anyone know the removal of that core

[FalcoColumbarius]

One thing I might add to Loki's suggestion is to remind you to clamp the hoses before you disconnect anything. When I replaced my rear fan set up (I landed on something whilst traversing the snow laden uneven paths of adversity up the Squamish Valley) ~ I saw it as being straight forward, which it was ~ except I didn't completely think it out and covered myself and the floor with around one litre of water, glycol & green dye before I stopped it up . You have probably thought about this but if you haven't then you ought to....

Falco.

[Stewart]

There must be a heater control valve in there somewhere. You might want to check if the rear heat control is turning the valve on and off.

Stewart

[shawnzy]

One thing I might add to Loki's suggestion is to remind you to clamp the hoses before you disconnect anything. When I replaced my rear fan set up (I landed on something whilst traversing the snow laden uneven paths of adversity up the Squamish Valley) ~ I saw it as being straight forward, which it was ~ except I didn't completely think it out and covered myself and the floor with around one litre of water, glycol & green dye before I stopped it up . You have probably thought about this but if you haven't then you ought to....

Falco.

alright update heater core was clogged and was able to clean it now i have heat. I thank you all and my kids thank you for everyones help and advise, this site is a life saver

[FalcoColumbarius]

Hey Shawnzy,

Let us know how the engine runs now that you have done this ~ see if it affects cooling in some way. If you don't mind, I would be interested in a follow-up. It's through these experiences that we learn. Cheers!

Falco.