Coolant tank replacement questions

[blue62]

On pulling the tank into the trunk to get to the hose clamps.

What I did was pull the rubber grommet on the main wiring harness. That wiring harness goes through the fire wall close to the coolant tank. There is a big rubber grommet where the harness passes through the firewall. I Just pulled the grommet up the wiring harness. I maybe even unplugged the harness and moved things to my advantage. this gives some room to reach in with needle nose pliers and grip the hose clamps as you pull the tank towards the trunk.
There is a video on youtube somewhere of a person using that method.

The oil fill tube is two piece I disconnected it in the middle (Engine bay).
Disconnect your hoses at the easiest end to get to.
From the top from below from the trunk what ever is easiest.
There is an over flow tube... it is only connected at the tank..the free end is held in a small plastic clip to a wiring harness if I remember correctly. Identify it. No reason to struggle trying to disconnect it from the tank. It can be removed after you have the tank out.

[Rob175]

My tank replacement was super easy.....took it to my "indi" Porsche shop and in about 2 hours and $750 later I drove off to dinner.......lol.

[LincolnPeters]

Finished this yesterday after three days of fussing with it off and on. Reading through the comments—everyone here is spot on.
My 2 cents, Blue and Rob175 nailed it in the comments. Starting from scratch, I’d totally spend $750 for an indie to handle this…but having done it once I think I could do it again in a couple-3 or four hours hours over two days.

Highlighting from below: No problem for me reusing the hose clamps.
You absolutely want the cable actuated hose clamp tool, and I’d get one shaped like a needle-nose that works at right-angle when I do this again…which I’ll have to do because—-
I couldn’t get the coolant level sensor back in after replacing the tank. There must be a molding blemish blocking the slot it slides in it that I should have checked before remounting the tank. Using it without the coolant level sensor for now…

My takeaway: This was all kinds of frustrating and F’d off. Glad I did it at home? Yeah, but it was dicey at points and scary that I might not get everything back together.
Peace and good luck.

[Frodo]

Another couple of questions have popped up.

I've got 2 gallons of Porsche coolant from years back. Actually, it was from July, 2011, the last time I had the coolant out. See why I'm doing a R/R on the water pump? It's not leaking, but it's just gotta be time.

Q1: The info on the 2 gal of antifreeze includes: On the front - Formula G-30-91-EF
and on the back is the part number, 000 043 301 05.

Just picking one supplier (Pelican), the part number they list is 000 043 305 75 M100. (I can't read the Formula number on the Pelican page.)

I need to pick up another gallon. Can I assume my old (but unopened) stuff is the same (or at least compatible with) the currently available stuff?


Q2: This one just popped into my head. With Porsche saying (I think) that this is forever coolant, I've never all that closely kept track of how old mine was. Clearly I change it every time I do a WP/t'stat, but (just as clearly) I probably go too long on that procedure. Is it recommended to flush the coolant more frequently than what I've been doing?