Hot Water

Submitted: Monday, Jan 06, 2014 at 03:40
ThreadID: 105703 Views:1581 Replies:7 FollowUps:4
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Hi guys, wondering if anybody can help me with this small problem. I have installed one of those heat exchanger shower set ups into my TD2.8 GU. The problem is that the water does not get hot at idle, only slightly warm (cool even). The heater also fails to blow hot except when the car is being driven. I am guessing that the cooling system is the culprit in that it works well....... At least I hope so. Anyway the system is set up in the heater outflow line from the main block and the water flows in the opposite direction to the coolant. I'd really like a warmish shower if I can achieve this some how with my patrol.......

Any suggestions gratefully received.

Cheers

Andrew
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Reply By: Member - Tony (ACT) - Monday, Jan 06, 2014 at 07:09

Monday, Jan 06, 2014 at 07:09
Yes at only idle you will not get enough hot water. From cold I run the motor at a fast idle on the hand throttle, and put the shower head into your water drum.

It will not take all that long to heat up the water then, except in the High Country in the middle of winter.

From there I use the heater control to regulate the heat flow.
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Reply By: Member - Jack - Monday, Jan 06, 2014 at 08:14

Monday, Jan 06, 2014 at 08:14
It may sound silly, but on my first use of my on-board heater I did not do this, so will offer it as a suggestion. Have you turned your heater slider/regulator in the cabin up to hot?
I also use a fast idle.
Jack.

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Reply By: Member -Pinko (NSW) - Monday, Jan 06, 2014 at 08:32

Monday, Jan 06, 2014 at 08:32
I recirculate water into the 20lt container until it is hot enough then close down the exchanger and turn the motor off. Then use the pump for all to shower. No risk of scalding with kids and if you have a shower head with on/off it works well.
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Reply By: Member - Phil G (SA) - Monday, Jan 06, 2014 at 19:46

Monday, Jan 06, 2014 at 19:46
Andrew,
When I had a heat exchange shower, I used it to heat the tub of water as others have above. That way you'd get a great (slow) shower with consistent temperature. But I also could only get to to work if we'd been out driving - starting from cold didn't work with the Prado I had at the time.
But I have to admit I ditched the system after a couple of years. I went back to the KISS system - heat up a 10 litre billy on the fire or the stove to the right temperature and use that with a 12V pump.
AnswerID: 523995

Follow Up By: Mick O - Monday, Jan 06, 2014 at 22:23

Monday, Jan 06, 2014 at 22:23
Yep, I had exactly the same issues. Took forever. Bought a stainless steel 10L bucket and simply heat that on the fire and use the pump I've mounted at the front of the vehicle. Much better arrangement.

Cheers Mick
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Follow Up By: Aussie Noel - Tuesday, Jan 07, 2014 at 10:04

Tuesday, Jan 07, 2014 at 10:04
Hey Mick been doing the same thing for the past 40 years,works well,always have a hot shower,gotta keep the cook happy Regards Aussie Noel
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Follow Up By: Member - Noldi (WA) - Tuesday, Jan 07, 2014 at 10:51

Tuesday, Jan 07, 2014 at 10:51
Yep, we bought a coleman instant gas hot water system, used it twice now were back to the bucket, easy
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Reply By: Michael ( Moss Vale NSW) - Monday, Jan 06, 2014 at 21:48

Monday, Jan 06, 2014 at 21:48
Andrew, firstly if your patrol doesn't give you warm or hot heater air when the vehicle has been running for some time , check your thermostat! Does it have one? Is it station open all the time. It's not good to run the engine cool without an operating thermostat! Just a thought!
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Follow Up By: Michael ( Moss Vale NSW) - Monday, Jan 06, 2014 at 21:49

Monday, Jan 06, 2014 at 21:49
Staying open I meant!
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Get out and do something instead!

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Reply By: AJS0764 - Tuesday, Jan 07, 2014 at 01:29

Tuesday, Jan 07, 2014 at 01:29
Thx everyone for your help & suggestions, on further research it seems the Patrol doesn't circulate coolant through the heater circuit at base idle. So have heard suggestions to use the heat switch to increase the revs. So I'll give this a go. I have had it working immediately after a run so I know it is capable of doing the job, just got to get the coolant circulating thru the HE.

Cheers again

Andrew
AnswerID: 524014

Reply By: Member - mike g2 - Wednesday, Jan 08, 2014 at 00:47

Wednesday, Jan 08, 2014 at 00:47
what? a shower... what luxury.... in jest....try old army method- 2 buckets, you stand in one, fill other with warmed water+pour over head,self slowly. wash. works a treat after a feral week in the bush!
most engines don't circulate thru engine/radiator/ heater until water hot enough for opening thermstat-doubt this would happen on idle, use throttle up setting if avail or similar.
MG.
AnswerID: 524071

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