Which hose goes where?

Post by **JulesMartin** » 16 Aug 2022, 13:08

Hi Guys, need a bit of help please. The engine on my 1984 T25 1.9 petrol went bang big time B.E.R I managed to source a replacement engine which came complete with all parts, carb, alt, exhaust etc. the problem is that the engine is younger than my camper and has a different plumbing system. My old engine had two big rubber hoses coming to and from the thermostat which was located under the water pump. The new engine has one metal pipe coming from the water pump back towards the back of the engine into a plastic housing holding the thermostat and temp sensor. I have assumed that the hose coming from the top of the rad would go into the thermostat housing above the thermostat and the one from the bottom of the rad into the pipe coming from the bottom of the thermostat housing (sorry this is going on so long) the two heater hoses go to a Tee off from the metal pipe mentioned earlier and the other to the right hand cylinder head. All goes ok but it seems to be running a bit hotter than it used to according to the gauge. there is also a small metal pipe running round the engine bay with various take off's for water returning back to the header tank. The last pipe on this metal tube was cut off when the engine arrived and I have nowhere obvious for it to go so I have blanked it off temporarily. Could anybody give me a definitive pipework layout or assure me that the pipes are round the right way and possibly where the small pipe coming from the metal tube should go. a big big ask I know and a very long message but any help as always would be appreciated

Post by **Smiffo** » 16 Aug 2022, 13:15

Post a pic of what you have. Engine bay, top down.

The carb you have will determine how it is plumbed in. ( Solex or Pierburg are usual types. )

That small metal pipe you refer to sounds like the bleed rail that runs around the engine bay under the lip for the engine bay lid.
I can post some replies when I know for sure we are on the same page.

E D I T - two thoughts... Your sig says '88... Post says '84?
Also, do you still have all the old plumbing?

Post by **Mocki** » 16 Aug 2022, 15:31

Post by **Robsey** » 16 Aug 2022, 18:18

The way I read it...

1984 plumbing and a 1988 engine.

Post by **Smiffo** » 16 Aug 2022, 18:28

Yeh, could be. You're probably right. originally '84, and now '88....

If so, and assuming Pierburg carb, Mocki's post should be close to correct - making allowances for the carb aspect?

Post by **JulesMartin** » 16 Aug 2022, 19:31

Hi guys, Thanks to all for your responses all very helpful. firstly my sig was for my 88 Camper which has now gone. the van in question is my sons 84 1.9 petrol. In the pic you sent there is a distribution tower. I don't have that and the pipe showing coming from the thermostat housing to the tower, goes into the back of the cylinder head and it was in place and looks to have been in place for some time so I'm not sure if this engine has a distribution tower. I will send pics of the engine bay tomorrow but I'm not sure it will help as it will show the 88 engine in an 84 bay with 84 pipes coerced into place but I will post I'll send pic of the carb as well I agree that the metal pipe is the distribution pipe but still none the wiser where the end pipe goes to. thanks again, I'll be back

Post by **Smiffo** » 16 Aug 2022, 20:13

OK. The distribution tower is behind the engine bay wall on right hand side looking in from rear of van.
if you don't have that, and you still have the old plumbing, it might be easier to re-install the old coolant system?

it's either that or buy what you'ree missing?

This is assuming I am understanding correct - will wait for your pics - I may confuse things without the pics.

Post by **Mocki** » 16 Aug 2022, 20:17

The above diagram is the late plumbing , you will need the distribution tower if you are going to change the van to suit the engine , however you can change the engine to suit the van , all the bolt on bits are interchangeable between all wbx engines with the exception of a DF which has different cross pipe to suit the solex carb
the water pump, thermostat housing , and all the complete cooling and exhaust systems fit from late to early or vica Verca but you can’t mix one type with another , it all or nothing which ever system you choose
personally I would change the van to suit the later engine

Post by **JulesMartin** » 17 Aug 2022, 13:38

Post by **JulesMartin** » 17 Aug 2022, 13:45

Thanks again for all your suggestions. The engine arrived on a pallet with all the pipes intact including the metal pipe that runs round the engine bay. The last hose from that metal pipe was cut. I"m happy to order new hoses in order to get the van to fit the engine as suggested but can't see where the tower would fit or where it would connect to.

Post by **Smiffo** » 17 Aug 2022, 14:40

OK, Pierburg carb, which is good to know.

That looks like they've left the old style hoses from the radiator right up to - and then spliced onto - the new thermostat housing.
I could be wrong. Never had an old style coolant system, but it looks like that to me.

Do you have a distribution tower on the other side of the engine bay here?
( You would have to reach under to feel for it, or crawl under the van to look up to it. )

Also it looks like they have cut off a section of the bleed rail:

That would ordinarily on a late system extend further to the right, and a small hose connect to a port on the distribution tower that would be poking through engine bay wall there.

How many ports do you have on the bleed rail too?
( To go late with Pierburg, you are going to need 5 ports in total. )

Post by **JulesMartin** » 18 Aug 2022, 10:32

Thanks Smiffo, I do not have a tower located where you say it should be, I do have 5 outlets on the bleed pipe though which came with the engine. I've spliced the pipes from the original configuration to fit the new engine but I'm really shooting in the dark. I'm assuming the hose from the top of the thermostat housing will go to the top of the rad and the return to underneath the thermostat housing but I imagine that this would be much simplified if I had the tower. I think the best option will be to buy a distribution tower and the hoses going to and from it as at least then i should have all the correct hoses and given the drawing from earlier work out which pipe goes where. the engine runs but runs at 3/4 on the gauge and 95' using a lazar thermometer, quite a bit hotter than the old engine and the temperature varies a lot from idle to higher revs so something is not right. thanks again for your help

Post by **Smiffo** » 18 Aug 2022, 12:29

No probs.

You need hoses:

https://brickwerks.co.uk/product/coolan ... e-t3-late/
Thats the return pipe from radiator ( bottom port on radiator ) that goes into thermostat housing.

https://brickwerks.co.uk/product/coolan ... t-housing/
Thats hose between distro tower and thermostat housing.

https://brickwerks.co.uk/product/coolan ... -wbx-late/
That's distro tower to right hand head.

https://brickwerks.co.uk/product/coolan ... n-to-pipe/
That's distro tower to feed pipe to radiator feed to front of van. ( Top port on radiator. )

https://brickwerks.co.uk/product/coolan ... 16-epdm-2/
That's distro tower to bleed rail.

Distribution tower: https://brickwerks.co.uk/product/coolan ... ual-to-86/
( I am assuming you have a manual and not automatic. )

Last note - your thermostat housing top is rotated 90 degrees. Straighten that when you make the changes too.
They did it to make the old style hoses reach, but when you install new hoses you will need to straighten it.

Good luck - and don't forget the Jubilee clips that go with each hose!

E D I T: Pick from earlier is slightly wrong, as assuming you have a manual transmission it will look like the one I have here.
( I doctored the original above to make it more representative. )

Post by **JulesMartin** » 18 Aug 2022, 21:21

Smiffo, you are amazing! what a comprehensive answer thank you so much. the thermostat housing is turned through 90' because in it's original place it was pointing towards the bulkhead and actually hitting it so it did kill two birds with one stone in allowing me to be able to also get the hose to fit and not have to cut away the bulkhead but I will take your advice just need to get the hacksaw out. Yes assumption is correct it is manual.
I know I should start another post but wonder if you can answer me this one? the engine does not turn over smoothly it sort of judders round and eventually fires up. both batteries are fully charged, all earth straps cleaned and intact the starter motor is from the original engine and is less than a year old and worked perfectly before. would you know if there was a change in the number of teeth either on the starter motor or ring gear. I have removed the starter and looked at the ring gear and it does seem quite beaten up so I don't know if this fault was on the engine before it arrived or if there is a difference in teeth if the damage is being caused now. there does seem to be some iron fillings kicking about in the bell housing. sorry to be a pain

Post by **Smiffo** » 18 Aug 2022, 21:29

I don't think there was a change in teeth between years, but deffo a difference between petrol and diesel ( won't affect you here. )

Maybe the brass bush in the bell housing is worn in the new engine, so when starter is engaged, it struggles to turn?
That's a pure guess.

Maybe film it and post up on a new topic so a few more experienced people see it?

Club 80-90 Forums

Which hose goes where?

Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?

Re: Which hose goes where?