Aisin TF-80 / AM6 oil, cooler and filter modification project.

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moizeau
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by moizeau »

Just read a useful tip from the C5 site. If the small T40 central level plug is knackered and can't be removed, this stops you removing the drain plug because there's no access for the 17mm allen key. I was think about drilling the centre of an allen key out but then came across an easier method. Drill out the threads of a 17mm nut. The T40 still needs removing, but can be done carefully on a bench. Just checked the prices of both. The T40 is roughly a couple of quid, the larger drain plug which incorporates the level tube is nearer 40 on a site I've quickly looked at, don't want to be damaging that one!
RichardW
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by RichardW »

The world's most expensive bolt?? :rofl2:
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moizeau
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by moizeau »

Got the bugger out. Couldn't use the 17mm nut method because it wasn't deep enough to give traction to drain plug and socket but the theory is sound if you've got a deeper / longer nut. In the end I drilled the centre out to use an easy out, wouldn't grip. The drilled out centre did allow a torx bit to be tapped in though, so partial change done. Just 3 1/3 litres (with this quantity I can get an extra change out of the 20 litre tub). Still black with a hint of red. Going to do another next week. Certainly smoother with no abrupt sneezes going from 2nd to 1st when warm.
Does anyone know what kind of mileages these boxes can do? I'm on 182k miles, 1st double change in it's (motorway) life at 167K
And another bonus, the 'most expensive bolt in the world' survived. I got 2 T40 plugs for the princely sum of €1.68 (both) from my local Citroen main dealer.
Gibbo2286
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by Gibbo2286 »

Those level plugs are made out of some sort of muck alloy, they seem to regularly need a bit of extra effort to remove once they've aged a bit.
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moizeau
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by moizeau »

Yep Gibbo, it rounded off easily (only the 3rd time it's been undone), when drilled the swarf was chippings and the easyout wouldn't bite. They're not going to be well made due to the expected frequency of use, 3 partial changes in the normal life of a car, so they'll see a torx bit 6 times in their lifetime.
tredy
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by tredy »

does all this incredible project actually provide improvements? which and where?
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EDC5
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by EDC5 »

As I mentioned in the posts, after fitting the cooler with a 75°C thermostat, the gearbox will be working at a lower temperature and the oil should last much longer. The filter I have used filters to a very fine level, so hopefully that will remove any wear particles and prolong the life of the clutches

Honestly, I don't think it was necessary, especially as I only have the 140hp engine, but an external oil cooler may be more beneficial for the more powerful engines linked to this gearbox.

Basically, the oil to water heat exchanger that is fitted is only there as it is cheaper for the manufacturer than fitting a proper oil cooler and not necessarily in the best interests of the gearbox itself, that was my motivation.
tredy
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by tredy »

I have the 3.0 V6 HDi and want to improve the cooling system...what system do you suggest me?
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EDC5
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by EDC5 »

It depends on what level of performance you would like? But basically, for your car I would go with a large radiator up front in the grille. Depending on the climate of the part of Italy where you live, maybe you don't need an oil thermostat?
I would also get the direct oil take off plate (and not the sandwich one I used).

Will you be doing the work yourself?
Are you bothered about installing an in-line oil filter?
tredy
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by tredy »

hi edc5 if I reckon I can do it myself I'll do it otherwise with the tips I gather here I'll take it to a mechanic.

I'm planning to get to 300hp, a large radiator instead of the one it already has?
what does the oil thermostat do?
do you have an example of an in-line oil filter and what it does?
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EDC5
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by EDC5 »

Cool, a 300hp C5 would be an excellent car!

I would use a larger oil radiator than I did for that sort of power.

Maybe if the part of Italy you live in is always warm, you don't need the oil thermostat either. It is there to help the gearbox oil warm up in winter.

I added the oil filter to prolong the life of the gearbox, hopefully it will trap any bits of metal produced by the wear of the gears. It's not essential but I feel better knowing it is there.
tommi000001
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by tommi000001 »

Hi
I have C5 x7 3.0 hdi too.
Can anyone please link a gearbox oil take off plate and cooler for front built in?
Thanks
Regard Tom
michok2
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by michok2 »

Hi Guys,
I see that this subject is kinda dead. Does anyone has a link to this sandwich plate?
On www.trancool.com this adapter is no longer available.
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white exec
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by white exec »

Hi, and welcome.
Try www.thinkauto.com for sandwich and take-off plates.
michok2
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Re: Aisin TF-80 / AM6 oil, cooler and filter modification project.

Post by michok2 »

Unfortunately there is nothing like that but i found something like this:
https://akpp.pl/FK-TF60SN-ROUND?search=FK-TF60SN-ROUND
Instead of filter i want to use oil cooler. Does anybody performed something like this?
How do you check oil level if thermostat will open at 75 degrees and oil level check should be done at 65-70?