variomatic replacement

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Duvel78
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variomatic replacement

Post by Duvel78 » 18 Dec 2005 01:09 pm

Hello guys

The variomatic on my '84 340 has died and I need to change it. I've found a donor car, any tips concerning a variomatic swap?
Collection: '78 343 Black Beauty, '82 345 GLS, '83 340 DL 2.0, '84 340 DL vario, '88 360 GLT 5d (2x) & 4d (2x), '89 GLT, '91 340 vario
Dad's cars: '87 340 vario, '89 340 vario
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Post by classicswede » 18 Dec 2005 01:21 pm

It's been a long time since I last did one I dont remeber any problems other that a couple of rusted bolts.
Dai

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antiekeradio
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Post by antiekeradio » 18 Dec 2005 07:56 pm

you can change it as a unit.

remove driveshafts (2 to wheel, 1 to engine)

loosen gear selector lever

support it at at least 2 places

etc. (you do not have to take of the drive belts)

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Post by daffodil » 18 Dec 2005 10:20 pm

how do yyou do it without removing drive belts? :o

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antiekeradio
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Post by antiekeradio » 18 Dec 2005 10:25 pm

remove the subframe to wich the primair and secundair are attached.

4 bolts.... it's the "H" frame

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Post by antiekeradio » 18 Dec 2005 11:34 pm

Image

capiche?

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shimon340
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Post by shimon340 » 19 Dec 2005 07:21 pm

Hi there!

How come you need to change the whole unit? What failed? normally the diaphrams can give out and need replacing but what happened with yours?

Im in the process of trying to learn the CVT as Ive got a CVt 340 also :)

cheers
Shimon
Enjoy your 300s

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antiekeradio
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Post by antiekeradio » 19 Dec 2005 09:14 pm

the big nut you see on the left side of the picture (center nut of secundary pulley) can run loose and destroy its thread.

the differential can fail

the pulleys can corrode badly so that they eat up the belts.


all three are possible reasons to do a complete exchange.

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shimon340
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Post by shimon340 » 20 Dec 2005 12:29 am

hi there..... quick question....

picture

http://i35.photobucket.com/albums/d156/ ... 0/cvt2.jpg

is the secondary the bit labelled as so in the picture?

is the labelled nut on the secondary the one that can run loose? Should I check this on my CVT car? whats the problem here... the nut runs loose and damages the thread? is it not repairable?

are differential failures uncommon? due to low fluid in diff??

pulley surfaces... they rust and hence damages belts?

can they be sanded smooth again? painted??


cheers..

thanks for your info!

look forward to reply!!

[/img]
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Post by antiekeradio » 20 Dec 2005 12:45 am

all indication arrows correct.


no painting on the surfaces. if there is some rust at the places where the belt has sat over long periods of time, thats no worry.
remove any 'blisters' of chromium because these tend to break, and the edges are so sharp they cut up the belt. sand the edges of the rusty areas, so that all is smooth again. you can't do much more, honestly...


the nut often comes loose just a bit, so that the pulley can move a tiny bit under it. (it moves coaxially) due to that movement, the teething that supplies the transfer of power gets damaged. if this becomes severe the nut runs off and the pulley gets launched to the bottom of the car....

Greetings Wouter
Last edited by antiekeradio on 20 Dec 2005 12:48 am, edited 1 time in total.

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antiekeradio
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Post by antiekeradio » 20 Dec 2005 12:47 am

diff problems mostly occur to people with sportive driving style.

oil level is something to check, should be part of the "2 yearly change/check all fluids procedure"

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shimon340
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Post by shimon340 » 20 Dec 2005 04:42 pm

I'll check the nut on mine next time Im under the car... wait a while as its cold here at the moment!

When the pulley moves, if this nut is loose.... its moves from side to sides ie looking down at the gearbox through the floor but facing the boot ...the pulley would be moving left to right.....

So for the pulleys its just a case of sanding them smooth.....?

What are the pulleys made from? steel?

thanks for your advice!! very cool!!


enjoy your 340!

Shimon

Im going to try to find the tightening torque for that secondary bolt.... dya know what its "techincal" name would be in a manual??

cheers
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shimon340
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Post by shimon340 » 20 Dec 2005 04:48 pm

thanks for all your advice!! really useful!!

Dya know of any good CVT service manuals? Ive already got Haynes and Autodata... is the Volvo one the good in your experience?

Im trying to learn to service them from books really as they are quite uncommon and garages dont know what to do... are they easy to work on?
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Post by ebdl » 20 Dec 2005 05:15 pm

If you haven't looked already, there are some articles on servicing/maintaining variomatics on the volvo owner's lub site - particularly to do with adjusting the clutch and belt tension. Thought this might help.

Ed

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shimon340
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Post by shimon340 » 20 Dec 2005 05:46 pm

cheers!! :) Ed.. is yours a CVT? dya service it yourself? didnt you have some probs with the clutch engagement recently? what was the post called?

cheers
Enjoy your 300s

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