Open Road

Did Porsche ever resolve the leaky overflow tanks?

I will be testing a new one within a week or three.

2021 sent a Aluminium one i made to Roger for test fit , he never came back with any comment ,think i made it a little to tall .fitted one on my LHD 928 but it was a tight fit but they are a fiddle fit any way .

Let me know what you would charge for one that is the same height as the stock one and minus one of the bleeder fittings.

I don’t see a means of checking coolant level in that.

That's correct just like 928 Motorsports made them , but if you have a working low level sender no problem, that was a prototype .going to fit sight level tube

potdog wrote: ↑Mon Jun 24, 2024 11:52 am That's correct just like 928 Motorsports made them , but if you have a working low level sender no problem, that was a prototype .going to fit sight level tube

A sight-level tube is a must have.

I have a client 928 in the shop that suffered a “catastrophic transaxle event” because the owner (and ‘technicians’ prior to me) didn’t bother to check and never saw the motor oil mixing with coolant.

I will never fit an opaque expansion tank.

Well blow me down just admit that you have a problem with me , yes it's me who made the oil neck baffle with louvers on top so that any one who did not have the Porsche plastic one , have you bought a Stainless Steel "Y" for the charcoal canister from Roger they are made by me . As for the opaque shite many vehicles have opaque header tanks so blow me down again "check water level regularly"

worf wrote: ↑Mon Jun 24, 2024 12:37 pm

potdog wrote: ↑Mon Jun 24, 2024 11:52 am That's correct just like 928 Motorsports made them , but if you have a working low level sender no problem, that was a prototype .going to fit sight level tube

…

I will never fit an opaque expansion tank.

I meant to write that “ I will never fit an opaque expansion tank unless it has a sight level tube.”

I assumed that the last part would have been logically self-evident and it was an attempt to let bygones be bygones.

I might have even considered fitting one of yours so-equipped.

potdog wrote: ↑Mon Jun 24, 2024 12:55 pm Well blow me down just admit that you have a problem with me , yes it's me who made the oil neck baffle with louvers on top so that any one who did not have the Porsche plastic one , have you bought a Stainless Steel "Y" for the charcoal canister from Roger they are made by me . As for the opaque shite many vehicles have opaque header tanks so blow me down again "check water level regularly"

Dude, I made the stainless Y-connectors 25 years ago. Sold a couple hundred of them. It became not worth my time and I posted the CAD drawing.

Being aluminum, I had considered brutalizing Carl's version to look like this ...... with a sightglass
I once saw a Land Rover (a variation, not sure which one) that had an updated off-road SS tank with a sightglass.

Found it ......... LAND ROVER 200/300 TDI/ V8 ALUMINIUM Header Tank with Float Switch

Interesting Jaguar worm hole this week for me.
Intermittent low coolant warning, but coolant not low.
The sensor uses a float, and of course, the float is attached to the fill tank not the sensor. Which requires replacing tank. That’s cool.
And yes Worf, I can see through the tank

Crumpler wrote: ↑Wed Jun 26, 2024 9:34 am Interesting Jaguar worm hole this week for me.
Intermittent low coolant warning, but coolant not low.
The sensor uses a float, and of course, the float is attached to the fill tank not the sensor. Which requires replacing tank. That’s cool.
And yes Worf, I can see through the tank

Dude!

Intermittent indicator lights on a British car are just to assure you the bulb still works,

Potdog,

Your reservoir is a much better looking specimen than any others produced before. The MotorSports one that Carl was selling was butt ugly and I would never have installed it any car I owned. I do concur that it needs a visible coolant level/sight level, though.

Nice job!

anyone have the thread specs for the sensor collar ? thread diameter, thread pitch and height?

Sender collar

diameter? thread pitch?

maddog2020 wrote: ↑Fri Jul 19, 2024 11:07 am diameter? thread pitch?

I measure 36mm OD x 3.0mm pitch, original reservoir pulled from service many years (decades?) ago because color, not leaks.

anyone know where I can find m36x3.0 aluminum weld on bungs? I'm going to make my own tank & the bung is the only thing I can't find.

Any competent machinist can turn one for you on a lathe a lot faster than you can find one pre-built. Just give him the dimensions you need.

most places don't turn stuff by hand anymore and they all want a cad drawing for it so they can punch it in, even if it is making just one.

worf wrote:I will be testing a new one within a week or three.

Worf, how is your new tank holding up so far? My replacement from 2019 has started to leak at the neck joint.

Andrew

Andrew S wrote: ↑Fri Aug 02, 2024 2:17 pm

worf wrote:I will be testing a new one within a week or three.

Worf, how is your new tank holding up so far? My replacement from 2019 has started to leak at the neck joint.

I haven’t been able to get back to that project yet. “Fix my A/C season” arrived with a vengeance.

my new one from 2019 leaked since day 1. I'm working on producing a really nice one with a flush sigh glass. Should have them into production by years end, and they will be much nicer looking than stock and carl's wont even come close to compare. It will be curved like the factory ones, and only have one seam around the middle.

A couple of months ago, I tested the new Porsche expansion tank before installing it.

It did leak...

... from the 35-year old gasket for the level sender that was transferred from the old tank.

I replaced the gasket with a Viton o-ring (since the gasket has no part number and is not available from every-day sources) and...

NO LEAK. Held pressure for hours.

Motor's not in the engine bay yet. So, the tank may develop a leak, but it doesn’t leak out-of-the-box.

My tank circa 2019 has started to weep at the joint between the metal neck and the plastic tank. Hopefully the latest stock of tanks has solved that issue.