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It has pros and cons. For example, 2 weeks after I had removed the OEM tank to install the new level sensor, the 35 year old crappy plastic tank cracked on the bottom and created a new leak so I got to remove the tank again to replace it with the aluminum one. Have had an aluminum one in my supercharged car since 2015 with no issues and now have one in the 84 and don't have to worry about the plastic cracking or neck leaking again probably for as long as I'll own these cars.
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
One issue is that even if the sensor lasts that long, the seal doesn't so they start leaking and require the sensor to be replaced requiring tank removal since it's under the fender even if the same sensor ends up going back in.
Come on man.
Rationalization for what one does is one thing,
but I don't think I've ever seen a sender seal leak, unless the sender had just been removed and re-installed without a new seal.
Conveniently, the Extremely Extreme GTS arrived, this week, from Thermal Racetrack.
I really had not given my initial attempt at making a "sight glass" for one of those aluminum overflow tanks (which I needed to use/modify because of the dry sump system) a second thought, since there was never any cooling issues.
(The radiator cap has not been removed, since we topped the system off.)
The car has almost exactly 500 miles on it, since the engine went in.
And ~400 of those miles were on the racetrack, at Thermal, in over 100 degree heat.
....With the engine at "full song".
Just went out and looked at the "sight hose" we made.
Hasn't changed, since creation.
Do not see any reason to change the design. "Sight Hose" on aluminum overflow tank. "Sight Hose" on aluminum coolant overflow tank.
Since clear tubing doesn't have reinforcement, the "trick" was to find a product that wouldn't balloon with pressure,, withstand heat, and not discolor.
400 miles and 6 months of "hellish" conditions isn't proof of concept, but is encouraging.
Since clear tubing doesn't have reinforcement, the "trick" was to find a product that wouldn't balloon with pressure,, withstand heat, and not discolor.
400 miles and 6 months of "hellish" conditions isn't proof of concept, but is encouraging.
good solution. i was thinking about routing a slot in the side of the tank and using high temp rtv to glue in a piece of high temp glass from the inside....i think this makes more sense. although, i am wondering if I could find a smaller diameter tube and smaller fittings and just install it oriented straight up and down...?
good solution. i was thinking about routing a slot in the side of the tank and using high temp rtv to glue in a piece of high temp glass from the inside....i think this makes more sense. although, i am wondering if I could find a smaller diameter tube and smaller fittings and just install it oriented straight up and down...?
RTV is never the answer..you need pieces that have a fit, and a proper seal...tanks see vacuum as well.
The McMaster offerings that were offered earlier seem to fit the bill nicely for an encased glass option. I don't have a great idea of what kind of height is available on the aluminum tanks but there was a reasonably short option (3"?) that seemed like it might fit the bill.
Of course, Greg's hose seems like it's working fine, too.
This has been going on, for several years.
When I replace a cracked tank, I tell the client, right up front, that the tank is going to leak at the junction of the bass insert and that there is nothing I can do about it.
This is a ridiculous state of affairs for what is a very expensive part.
Does anyone know whether the RHD part have same predictable leak?
This is a ridiculous state of affairs for what is a very expensive part.
Does anyone know whether the RHD part have same predictable leak?
Shawn, just put in the aluminum tank, make sure your level sensor is working and check the coolant level when you check the oil every couple weeks. No leaks, no failures, no worries.
11-11-2022, 02:33 PM
