Testarossa Heating system pipework help - setup

Hi Guys

I'm a little stuck with the 'Ratarossa' build and need some help please.

Working on the heater system and as the car came arrived like a giant jigsaw puzzle in crates I am currently trying to put together the heater and a/c system.

I have most of it figured out but stuck on a couple of points.

Firstly: Looking at the parts diagram pipe number 39. This runs from the engine bay and directly to the threaded connector built into the heater system ..... can someone conform this to be correct ??

If my assumption above is right then for some reason my pipe connector does not fit (its to small) the threaded outlet from the heater unit (see pic)

The pipes are all connected at the engine end and these pipes were already in the car when i purchased it (so I cant rule out them being incorrect)

Am I missing something ? Should there be an reducing adapter ?

I did lots of looking on the threads, can see the 512TR has a different setup in this area and an extra box connector. But nothing on an early TR such as mine.
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Second question to clarify:

You can see in my car the two pipes 25 & 27 have simply been joined.

I would like to check these are the correct pipes to connect:
1: to outlet on heater system (circled in yellow)
2. to bottom of the valve (as per pic using a different pipe to show what I mean)
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Other outlet rubber pipe from heater system goes to connector the top of the valve

 

Finally I need some help working out all the small rubber tubing and its location ...... but that can wait for now !
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If I am correct and this number 39 pipe defiantly runs to the threaded outlet of the heater system. I was thinking of just going to a plumbers merchant and getting an adapter ?

 

They are both present in the setup ...

41. Is the electromagnetic valve
28. is just a copper reducer or pipe connector
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Yes thats my thoughts on it but cannot figure why they are different size connectors and won't join ???

 

So I had Maranello check and send me pictures of the pipes.

This is pipe 22. p/n 124022. Runs from A/C compressor (engine end) to Condenser (in front of drivers wheel arch)

Note: I have this pipe and its all connected up.
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I then got them to check pipe 39. p/n 124670 (US car version). This runs again from the A/CV compressor to the evaporator (what is the evaporator ?)

Now if you compare the connectors on the Maranello pictures to the end on my pipe 39 .... its different.

So basically what would be extremely handy is a picture from someones Testarossa (pre 512TR) to see what the pipe looks like that screws onto the pipe from heater unit. problem is i'm unsure how much you could actually see by just pulling down the passenger foot rest and looking behind ?


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Are you absolutely sure they all clamp to it ? I don't understand if thats the case why there is a thread on one of the pipes from the dash rad ?

I looked around and this TR unit is for sale on ebay, its identical to mine and again you can see the thread from the pipe
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Wait a minute !!!

I was studying the parts diagram again and paid a bit more attention to this area pictured below.

Correct me if I am wrong here but thats the air con compressor and the setup for US cars appears different from Euro spec (which is the bulk of the main diagram). For US cars from the AC compressor the cable looks to route via and through an 'exchanger' using pipe 57 (exchanger to compressor 125851) then out again via pipe 58 ( Evaporator to exchanger 125852)

From the parts image the 'exchanger' seems to be housed in the fuel tank ???

I will try and get closer to the pipework in my car (engine end and see where its routed) ....no idea if ill be able to actually see that much without removing some major parts

 

BINGO !!!

I have finally sussed this out guys.

- Romano for reference my car is a US version of the Testarossa so should indeed route via an 'Exchanger'

First I disconnected both pipes at the engine ac compressor. I then disconnected the pipe at the condenser (front wheel arch). the other pipe was already disconnected sitting in the cabin.

I then got someone to block the end of the pipes while I blew down from the compressor end.

Results:
1.Small connector pipe had pressure when blocked BUT went to the cabin - This should run to the top of the Condenser (so routed wrong)
2. Large connector pipe had ZERO pressure when other end was blocked = VERY STRANGE

I did some more digging and got under the car with a torch.

1. Large connector did correctly route down and into the 'exchanger' (this is situated in the lower part internally of the right fuel tank) this was in the rear input connector of the tank.
2. However looking around a bit more and moving some pipes (very limited access) I discovered there was nothing connected to the 'output' hole !!

Then I though this was weird because I have two hoses at the front of the car 1 at Condenser 2. in cabin (loose)

from the first test I knew the one in the cabin was routed wrong so this only left the one from the condenser. moved to the font underside of the car and removed the clamp from the centre of the car holding the pipe in place (freeing it up) I gave the pipe a tug and hardly any resistance .....pulled some more and the pipe was clearly loose, pulled the whole thing out and someone have cut the pipe !!!

Actions now required to fix problem:
1. I need to reroute the current small pipe thats in the cabin to the front of the car and connect to the A/C Condenser
2. Need to purchase pipe number 58 (evaporator to exchanger US) 125852 and fit that to the car

Next question:
Anyone know of a US Testarossa being broken. Eurospares are asking £337 for that pipe !!


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Yes sorry you are correct a/c hose !!

Good idea, I will look into an independent to see the cost