Finally put the turbo on my Patrol
Submitted: Monday, Jan 29, 2007 at 23:01
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Luke SA
Ive had the turbo sitting in my spare bedroom for about 18 months now and slowly getting bits and pieces to put it all on as I didnt get the whole lot when I bought it.
I bought the turbo and dump pipe and a other few bits and pieces from Roachie.
On the weekend stripped the the front pipe and and manifold from under the bonnet and started fitting the hairdryer. I had a few little problems like the nuts would bind up on the studs and strip themselves when i tried to undo them so I had to go and buy a tap and dye to give them a clean. (Even though they "looked" clean)
When I eventually got the manifold against the side of the head I just had to overtighten a nut didnt I, and yep....... I broke a stud, easy outs were my new best friends. finally got it back on and was a bit more carefull.
I ran the oil feed from the oil pressure sender and after undoing 34 sump bolds welded a fitting in the side of the sump for the drain. For the water I drilled a hole in the housing that the lower radiator hose feeds into, taped a thread and put in an elbow brass fitting, and put a rubber hose from there to the metal hose that leads to the turbo, put another hose from the thermostat housing to the other metal hose to the turbo. Sound a bit confusing.......... it confused me lol
As soon as I was able to start it, i did strait from the dump pipe to see if it ran smoothly....... I was glad it did, there was only one oil leak coming from the T piece I put in the oil pump for the oil feed
I have sorta bodged up the exhuast so I can drive it until I get a complete 3" exhuast put on but for now does the job
As far as power goes I wish I had put it on 18 months ago I wouldnt be without it now I just have to get used to the whistle it makes it sounds like a truck is passing me out on the highway its that bad. I have done a search on turbo whistles and it seems to be "sorta" normal but it still worries me a bit. Maybe when I get the exhuast and injectot pump tuned it might quieten down a bit ........ I hope
It was a good few days with a couple of challenges but would do it again and a hoist is a must, it made life soooooooo much easier
Cheers Luke
Reply By: Ian from Thermoguard Instruments - Tuesday, Jan 30, 2007 at 09:22
Tuesday, Jan 30, 2007 at 09:22
Hi Luke,
Congrats on getting your turbo set-up. I'm a bit confused by your water piping though.
Please correct me if I'm wrong about the Nissan coolant circuit and/or turbo cooling, but it seems as though you will be taking 'hot' coolant from the thermostat housing, passing it through your turbo bearing jacket, then discharging it into the bottom hose (pump suction). This small flow will be completely bypassing the radiator, no?
I would have thought the ideal would be to take relatively 'cool' coolant from the pump discharge side (not sure where you'd pick this up on your engine though - perhaps a drain port low down and towards the front of
the block?) to the turbo jacket. Then discharge into the t/stat housing and send it through the radiator.
If I've interpreted it all wrong, my apologies.
Ian.
AnswerID:
218546
Follow Up By: Exploder - Tuesday, Jan 30, 2007 at 17:56
Tuesday, Jan 30, 2007 at 17:56
I think It Picks the coolant up from the lower radiator Hose aria (Before the water pump) then the water runs throe the turbo and back into the Theostat housing to go back into the radiator to be cooled.
That’s the way I read it anyway.
FollowupID:
479073
Follow Up By: Luke SA - Tuesday, Jan 30, 2007 at 18:36
Tuesday, Jan 30, 2007 at 18:36
I always thought the water flowed up thru the radiator not the other way around. Correct me if im wrong somebody.
The water is suppose to (in my way of thinking) go from the radiator thru the top radiator hose out of the thermostat housing thru the turbo, out of the turbo and back into the lower radiator hose
If I have it wrong I would apprieciate it if someone told me as I dont want to blow up the turbo
Cheers Luke
FollowupID:
479080
Follow Up By: Ian from Thermoguard Instruments - Tuesday, Jan 30, 2007 at 18:57
Tuesday, Jan 30, 2007 at 18:57
Hi Guys,
This is my understanding of normal engine coolant systems (please correct me if its wrong): While pump-forced, they still employ the thermo-syphon system. That is, water flows upward from the hot engine block, throught the thermostat housing, then into the radiator core where, as it cools, it falls to the bottom of the radiator, then back int the engione from from the bottom hose. [I believe the original Ford flathead V8 employed ONLY thermosyphon circulation without any pump, is this right?[
Now add a water pump at the engine block end of the large diameter bottom hose and it acts like this: the lowest pressure point in the system is at the pump suction (the bottom hose) and the highest pressure point is at the pump discharge (in the engine block, at the front, just behind the pump). So, at every point in between, the pressure is somewhere gradually decreasing between the highest and lowest points.
Therefore, the t/stat housing will be at a higher pressure than the bottom hose (the lowest pressure) - and water will have to flow from the higher pressure point to the lower pressure point. Any cooling system specialists out there (Mr Water Saver Alarms?), would you tell us if this is so or not, please?
FollowupID:
479087
Follow Up By: Luke SA - Tuesday, Jan 30, 2007 at 19:17
Tuesday, Jan 30, 2007 at 19:17
Hi Ian, I can not corect you on any of that............. you lost me when you said thermo-siphon ;)
But I can say that if your understanding is correct about water flowing down the radiator then I dont think there would be a problem as water would flow from the bottom hose, divert to the turbo (before the water pump) then to the thermostat housing and back thru the radiator.
The hose that goes from the bottom rad hose housing to the turbo is the way they are from the factory but the other one is supposed to go in the side of
the block but I couldnt do that as I didnt want to start drilling in
the block so I ran it where I did
Cheers Luke
FollowupID:
479094
Follow Up By: Member - Shane D (QLD) - Tuesday, Jan 30, 2007 at 20:12
Tuesday, Jan 30, 2007 at 20:12
hot water goes in the top and cool water comes out the bottom of a raditor
FollowupID:
479117
Follow Up By: Luke SA - Tuesday, Jan 30, 2007 at 21:22
Tuesday, Jan 30, 2007 at 21:22
Thanks Shane it makes sense now that I have been thinking about it. The water gets hot going thru the engine and heats up the thermostat, thermostat opens and water flows on ;)))
Cheers Luke
FollowupID:
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Follow Up By: Ian from Thermoguard Instruments - Wednesday, Jan 31, 2007 at 08:21
Wednesday, Jan 31, 2007 at 08:21
Hi Luke,
Re. your comment: "then I don’t think there would be a problem as water would flow from the bottom hose, divert to the turbo (before the water pump) then to the thermostat housing and back thru the radiator." - but unfortunately it can't. Like all fluids, water flows from high pressure to low pressure and the lower hose (the pump suction inlet) is the lowest pressure point of the system.
I'm sure the flow in the factory set-up is the opposite to what you have assumed: it flows FROM the port in
the block (on the pressure side of the pump), through the turbo jacket and then TO the bottom hose (the suction side of the pump). That's why, in my original reply, I suggested looking for a coolant drain plug on the side of
the block as a suitable source of higher pressure, relatively 'cool' coolant.
If you then kept the return from the turbo going to the t'stat housing (as you have it at present) you would also get some natural ("thermosiphon" - hot fluids rise, cool fluids fall) circulation still occurring after switching off - always a good thing for turbo bearings.
Interesting discussion - but I hope some specialist our there can definitively resolve this for us shortly.
Ian
FollowupID:
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Follow Up By: Ian from Thermoguard Instruments - Thursday, Feb 01, 2007 at 14:04
Thursday, Feb 01, 2007 at 14:04
Hi Luke,
Looks like no 'experts' have come to the rescue.
To
check the direction of flow with your set-up, perhaps your could insert a short length of clear tube into your turbo jacket line (when it is all cold) and see which way the flow is? Hopefully there'd be enough small bubbles or fine particles in it to 'see' the flow?
Ian
FollowupID:
479450
Follow Up By: Ian from Thermoguard Instruments - Tuesday, Feb 06, 2007 at 07:37
Tuesday, Feb 06, 2007 at 07:37
Any update on this, Luke?
FollowupID:
480652
Follow Up By: Luke SA - Monday, Feb 12, 2007 at 00:47
Monday, Feb 12, 2007 at 00:47
Hi Ian,
I did what you suggested with the clear hose idea, and the water flow goes from the thermostat housing thru the turbo and back into the bottom radiator hose housing, meaning water flows from the engine thru the turbo and back thru the engine. Its been like that for two weeks now and is still running fine so I think I will leave it like that.
Ideally I would rather it come straight from the radiator thru the turbo and straight back into the radiator but I couldnt find two small hose fittings on the radiator, only found one up the top
Thanks for your concern and asking
Cheers Luke
FollowupID:
481880
Follow Up By: Ian from Thermoguard Instruments - Monday, Feb 12, 2007 at 09:00
Monday, Feb 12, 2007 at 09:00
Hi Luke,
Thanks for going to the trouble of checking the flow.
No joy with finding a drain plug on the side of
the block, eh? That would be the ideal source point - then take the turbo outlet hose to that fitting on the radiator top tank. The current set-up will work fine most of the time but if you're ever working the engine hard in hot conditions (40C+), the turbo bearing may not be getting the specified cooling.
Ian
FollowupID:
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