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Old 24th April 2009, 08:00   #1
McMasters
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Cool Traction Control actuator... AGAIN

Hi traction control victims.
I am wondering if the traction control motors in Rover 75s (Actuaqtor-Secondary part# SWY 1000030 ) are just badly build using plastic cog teeth or there is a external factor that causes the cogs to get their teeth ripped off??? Something to do with the cable set up or dirty manifold or or ???

I have just installed my third one in 3 years. At 300+ Euro a pop.
After searching a few posts I dismantled the two broken units using the tips in this thread from another forum http://forums.mg-rover.org/showthread.php?t=172482 and found broken plastic cog teeth in both.
The good news, different broken cogs in each unit so, I carefully rebuilt one working unit taking care to get the spring loaded cog properly set up. Now I have a new unit in the car and a spare repaired one for the next disaster and hopefully less expensive experience.
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Old 24th April 2009, 08:53   #2
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I have not had any problems in over 100,000 miles (touch wood)
Unless it doesn't effect the diesels the same?
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Old 24th April 2009, 09:09   #3
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I had to change mine two years ago. My current one developed an extra noise a couple of months back - when i turn on the ignition, the T/C actuator does its test cycle (on-off-on-off) with a horrible clack-clack-clacketi-clack noise. Every third time or so the T/C warning light stays on after startup. A restart of the engine (again with the horrible noise from the actuator) usually cures this. I have cleaned the electric connections to the actuator and cleaned the sensors on the intake side, but this didn't cure the problem. I suppose I would need a new actuator (again). If the TC could be disconnected without lighting up the warning it would the best solution.

BTW the TC actuator is compeletely interchangable with a BMW part, at least here in Finland the BMW part was about half the price of the Rover part.
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Old 24th April 2009, 09:56   #4
McMasters
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I have this nagging thought that something must freeze the unit temporarily and thus lead to pressure on the cog teeth.
Can't think what though.
The unit is built by Bosch so I expect the BMW units come from them too. What does a BMW unit cost?
I only wish they had built them with metal gears instead of breakable plastic.
The clack clack noise you describe does sound like the gears are stuck and jumping cogs.
I didn't hear any noise in mine just the light came on to indicate a fault each time the unit packed it in.
When I opened them up I found two or three broken teeth loose inside. I even tried to break a tooth to see how tough they were and found it quite easy. NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD- quality.
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Last edited by McMasters; 24th April 2009 at 09:58.. Reason: typo
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Old 24th April 2009, 10:48   #5
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The BMW part was about 270 euros if I remeber correctly. The Rover one was 600 euros+!
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Old 24th April 2009, 10:54   #6
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Yikes I've been robbed.....again. :-) Helping to solve the EU financial crisis I guess.
More tax tax tax for your clack clack clack
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Old 24th April 2009, 10:57   #7
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Thats crazy.
Latest EPC shows it at:
Part Number: SWY100030 Actuator-secondary throttle £319.55 + VAT
(One to many 0 in your number)
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Old 24th April 2009, 11:07   #8
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Well £320 + tax + p&p + retailers margins = €€€€. I'll get another BMW actuator then.
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Old 24th April 2009, 11:12   #9
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Do you know the BMW part #?
Just in case that is.
You probably detected a touch of pessimism with that request. One unit every year etc.
No, my repaired unit will hold up if I ever need it. ;-)
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Old 24th April 2009, 11:17   #10
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I can have a look at the old bill tonight and see if the part # was mentioned there.
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