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  #1  
Old 10-17-2005, 09:23 PM
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Where to tap into coolant for heating SVO tank

I have everything ready and was going to tap into the heater hose coming out of the head and behind the water pump in the hose before it connects to the pipe to run back to the heater. Then I read a lot here, now I am confused. Is this going to work without having the heater on? I do not see any other place.

thanks... Again.
Doug
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  #2  
Old 10-17-2005, 09:44 PM
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top hose

the top hose going from the engine to the radiator is the return hose..
water goes from the bottom of the radiator into the engine and out the top hose back to the radiator... your hottest water, the quickest is the top hose.

it also has preasure..

route it back to your svo... and then back to the radiator...
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  #3  
Old 10-17-2005, 09:56 PM
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Where would you get a tee to tap into this hose?
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  #4  
Old 10-17-2005, 10:25 PM
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dont use a t

dont use a t... just use an adaptor... route the hose
from the engine to your svo tank... and circulate it through
the tank and back to the top of the radiator...

the water coming out the top of the engine is the hottest the quickest..

it also has some preasure to it...not much but enough to make the trip
to the back of the car and back...cut a hole in your trunk and run two pararel hoses.... one will connect to the engine where the top radiator hose does.. and the other will connect to the radiator... thus eliminating the top radiator hose...
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  #5  
Old 10-17-2005, 11:31 PM
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you didn't say what car you have,
but this attached diagram might help you...

i think a good place to tap for vo heat exchanger feed would be after the block but before the heater valve...
tap the vo heat exchanger return in somehwere after the thermostat but before the waterpump...
if you did this, you would in effect be running your vo heating circuit in parallel with your cabin heating circuit and they would be independent of each other

when considering where to tap your coolant lines, keep in mind that before the thermostat is opened (while the engine is still heating up to operating temperatures) coolant will not be flowing through the radiator

also, you might like to consider adding a simple valve to your vo hot water source line... this way you could shut off the heat to your vo system should you ever want to (like if you decided to fill this tank with diesel)
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Where to tap into coolant for heating SVO tank-coolant.jpg  
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  #6  
Old 10-17-2005, 11:39 PM
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Sory, I have an 85 300SD

I ran 3/8 hose to the heat exchanger, That is what I did on my truck, and it worked well.

Before the heater valve so it is in paralell sounds good. The valve for the heater is nehind the firewall I believe? So into the heater lines inside the engin compartment sounds acceptable, right?

Thanks
Doug
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  #7  
Old 10-18-2005, 08:08 PM
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thinking to much

your thinking to much...
it takes for ever to get the inside of a diesel warm...
sometimes i drive home and never feel heat... but i have
pulled the top hose off and felt warm water within just a few
minutes....


yes, you can connect into the cabin heater system....
but that just means instead of taking forever for the car interior to
get warm it will take FOREVER...
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  #8  
Old 10-18-2005, 11:13 PM
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Where would I find an adapter to hook into the top hose? And what would this adapter be called?
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  #9  
Old 10-19-2005, 01:52 PM
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Tap into the heater hose coming from the block next to the oil filter. Use a T. Route that to your HE. Then, tap into the heater hose just after the aux pump (close to the water pump) with a T to your HE.

Arrange the T so that it will not interfere with getting the oil filter out, or you will regret it.

You will get heat to the HE without running the heater. Works for me.

Here is a post with pictures:
http://biodiesel.infopop.cc/groupee/forums/a/tpc/f/159605551/m/813107262/r/620101362#620101362
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  #10  
Old 10-19-2005, 02:25 PM
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I have mine T'd same as Tenknots. I placed brass ball valves at the two T's so I can totally shut off the vegie side in case my hose leaks. The brass Valve gets too hot to touch very quiclkly. I am thinking of running copper line from the valve to coil around the portion of veggie fuel line that enters the stock fuel heat exchanger (before LP) as that portion does not get heated at startup.
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  #11  
Old 10-19-2005, 05:49 PM
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10kts is correct

I would advise against what BR suggested.
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  #12  
Old 10-19-2005, 07:33 PM
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i drive.

friend, i drive a 1983 300 sd w126 day in and day out
365 days a year.... and during the summer it runs hot wit the ac running all the time so i take out the thermostat.... and during the winter
i put the thermostat back in and i put card board over the radiator and it never gets warm... never...

personnally i just put svo right into my fuel tank and in the winter
i dilute it with diesel... and i never have a problem... never....

but if your going to have a seperate tank the best way to do it is to warm it with a block heater and an electric battery warmer.... just plug it in... and when you drive you will use the hot water from the engine...but instead of that i would use a 12v warmer.... and just forget about the water... the most important thing is the relay switches that will switch from diesel to svo.. i am sure if your going to this trouble your also going to build a switching system that will allow you to start off on diesel.... these things are notorious... and often pump diesel into the svo or svo into the diesel...
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  #13  
Old 10-20-2005, 08:51 AM
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Quote:
Originally Posted by blueranger
friend, i drive a 1983 300 sd w126 day in and day out
365 days a year.... and during the summer it runs hot wit the ac running all the time so i take out the thermostat.... and during the winter
i put the thermostat back in and i put card board over the radiator and it never gets warm... never...

personnally i just put svo right into my fuel tank and in the winter
i dilute it with diesel... and i never have a problem... never....

but if your going to have a seperate tank the best way to do it is to warm it with a block heater and an electric battery warmer.... just plug it in... and when you drive you will use the hot water from the engine...but instead of that i would use a 12v warmer.... and just forget about the water... the most important thing is the relay switches that will switch from diesel to svo.. i am sure if your going to this trouble your also going to build a switching system that will allow you to start off on diesel.... these things are notorious... and often pump diesel into the svo or svo into the diesel...
Sorry but I disagree. Notorious where? The pump sucks from the line that is opened by the switchover valves. The return line(s) go to the tank it is directed to (manual, electrically controlled or a combo).

I have my set up so I can return line to any tank so I can dilute the diesel tank w/ wvo during the summer. I have never had fuel going from one tank to another even when I had a bad switchover valve.
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  #14  
Old 11-25-2005, 11:58 PM
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Hey tenknots...

Looking through old threads to heat WVO lines with coolant lines and came across your post withthis pic.

http://biodiesel.infopop.cc/groupee_files/attachments/6/2/0/620101362/620101362_Fatmobile_Coolant_Tee2.JPG?ts=4387EA9F&key=60D743AB8D94B61D5C3F1D6364FAD7A2&referrer=http% 3A%2F%2Fbiodiesel.infopop.cc%2Fgroupee%2Fforums%2Fa%2Fga%2Ful%2F899109607%2FFatmobile_Coolant_Tee2.J PG

Does he have fuel lines geting heated anywhere in this shot? All I see is hoses for coolant and a couple of clamps.
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  #15  
Old 11-26-2005, 08:37 PM
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if i disconnect the top hose comming out of the engine, connect a U copper pipe, and have thiner (with fuel in it) copper pipe going around that U to get hot... will i need to bleed the air out? i am talking about the larger hose with the engine coolant in it. if i disconnect it, will i loose alot of coolant/water?

if i just disconnect the hose and hook up my heat exchanger, there will be alot of air in the heat exchanger. will this pose a problem. could i just fill it all with water and leave it like that?
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