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Discussion summary
YOUR RESEARCHHow the Disc valve work on Tiptronic
Leading reported evidence
Clean mating surface is tedious due
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Suggestion
Cleaning the mating surface is tedious due to lack of space.
Leading evidence: 'Clean mating surface is tedious due' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean mating surface is tedious due' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
It happens on the gt3 system too because it uses a cooler too.
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Rennlist: 1 discussions
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Hello,
On the box there is a valve which is originally closed.
Controlled by vacuum via a solenoid valve.
I was wondering, when starting, this valve closes so as not to immediately bring fresh LDR to the box or does it remain open and activate later?
And maybe someone have the plan to see where all the little pipe go ? I suppose I have something wrong with this because my Engine temp is very very very long to warm.
THANKS
The tiptronic gearbox is the same as Mercedes 722.6.
Here is the technical manual:
https://www.w124performance.com/docs..._ATSG_2004.pdf
See if it can help you. Search the PDF...
That is the bypass solenoid to the trans oil cooler on the tip. It shouldn't affect how long the engine is taking to warm up. I would be looking at the thermostat as it sounds as if it may be stuck open.
I just replaced mine and it's a pretty straight forward job. Cleaning the mating surface is tedious due to lack of space.
Not true its a well documented issue with the cooler bypassing coolant. It happens on the gt3 system too because it uses a cooler too.
Sorry i cant help on the valves opperation.
The disk valve is a vacuum controlled coolant valve that has an Electro-vaccum solenoid that controls it...
It closes the coolant to the Trans cooler/heat exchanger to help warm up trans oil faster, but if not working ( constantly open) it will cause the coolant temp to be slow reach normal operating temps also...
If not working it will cause a fault code on 996.2 cars ( fault code for coolant temp not reaching normal temp within the temp map time parameters) ...This code doesn't appear on early 996.1 cars due to the temp time map is not as sophisticated ....
To explain after resolve my problem.
When you turn on the car, the disc valve move to close the coolant passage. If he stay open, your engine will have low Temp during a long time and you will have a error on the board.
This is a source reference. Confirm exact model applicability in the original material.
