Tom M'Guinn

One of the heater core pipes sticking out of the firewall in the engine compartment is rusting/collapsing on my car. Is the pipe that sticks out into the engine compartment part of the heater core itself, or are there connecting pipes between the ones that come off the heater core and the ones that stick out into the engine compartment?

In other words, do the copper colored pipe ends in this picture feed through the firewall into the engine compartment, or are there other pipes that connect up to the core?

fortysixandtwo

The parts catalog show a connecting pipe between the heater core and the fire wall connection
944 572 184 00 water tube return line
944 572 185 00 water tube supply

Theres an o-ring an clip also, used to secure the above mentiond hoses to the heater core

944 572 287 00 clip
944 572 188 00 o-ring

Tom M'Guinn

Thanks. My computer crashed so I am without my regular resources for a while. Are both pipes identical, or did you mean to post different part numbers?

fortysixandtwo

Oops. Good catch. I'll edit my post.
Thought the lines look very similar, they are different.

Tom M'Guinn

Thanks very much!

toddk911

What is easiest way to access the core?

spyder348

no easy way, pull the dash, cowl, remove blower box then control box inside. it sux

toddk911

Crap! figures. LOL

spyder348

whats wrong dude you try to flush it and it not work still?

spyder348

to flush you dont need to pull the core but i think you know that.

Tom M'Guinn

I don't actually need to replace my core, I would just like to replace the metal pipes running from the core to the fire wall, since the portion that sticks out into the engine comparment is damaged and doesn't seal well.

Removing the core is shown here without taking off the dash, cowl, etc.

https://rennlist.com/forums/968-foru...core-swap.html

Can anyone confirm that the pipes protruding into the engine bay (i.e., the pipes the heater hoses connect to) are actually the ends of the hard pipes that run from the core to the firewall?

JohnKoaWood

Year dependant... attached are the early vs late diagrams showing rubber hoses off the core to the firewall, then rubber from the firewall to the valve, I immagine the metal pipes at the fire wall are part of the firewall bits shown... 1st is late, 2nd is early

Tom M'Guinn

I'm guessing that's not the case on the later cars. The diagram does not show any additional clamps or connectors at the firewall hardware, so I've assumed the pipes inside the engine bay are just the ends of those pipes. Lart is checking to see if he has a set, so hopefully that will let us know for sure.

JohnKoaWood

Tell him to post pictures if has them... I can't find a picture of them to save my life!

The 968 DIY you posted a link to, makes them look like ruber over copper... hmmmm...

Tom M'Guinn

They look like rubber covered copper when I crank my head under there too. I just can't quite tell what's holding them in place until I dig in -- hoping Lart might report in after checking it out on one of his parts cars.