|
|
|
|
| Author |
|
|
Registered
Join Date: Jan 2013
Location: Australia
Posts: 176
|
Bosch Starter
I have had a couple of occasions where my starter gave the oft referred to 'clunk' and then started the motor with some clatter. The engine then runs perfectly. I re-did and even added to the chassis earth connections in a couple of places and then, after no real improvement (it did spin faster), removed the starter. I benchtested the starter, bypassing the solenoid, with a battery and it did not spin but the pinion/shaft popped out but did not retract. I also checked the ring gear on the flywheel with a light and mirror - turning the engine. All seemed fine there. In dismantling the starter (below) I am not sure about what appears to be a bearing on the shaft between the pinion and the clutch mechanism. Should this turn freely? It turns a somewhat tightly - one way only. Is this correct? I believe that it is. Bushes seem fine and also the armature.
I re-assembled the starter after a good clean up, new thrust washers and so on and a check over electrically. The pinion shaft now pops out and sometimes returns when triggered. It does not fully retract however. But I would think the starter should spin! It obviously does on the car but maybe the pinion shaft was staying half out and causing that rattle against the flywheel? The starter in there now is a Bosch (remanufactured) 003911023A. Any ideas welcomed please. Seems like a new starter is the order of the day. Or can these be re-built? 
Last edited by Mervo; 11-23-2013 at 08:04 PM.. |
||
11-23-2013, 07:51 PM
|
|
|
Registered
Join Date: Jan 2013
Location: Australia
Posts: 176
|
These two photos show the pinion when pushed in and after triggering - and only half retracting.
  then |
||
|
11-23-2013, 08:06 PM
|
|
|
Registered
|
The thing that looks like a bearing is a one way clutch.
It's there to prevent over-run of the starter if you hold on to the key too long. It should slip easily in one direction...and lock tight in the other. Other than that...clean and lube (lightly) all the bearing surfaces...but keep the clutch clean...no lube....you don't want it slipping when starting the engine. Bob
__________________
Bob Hutson |
||
|
11-23-2013, 08:56 PM
|
|
|
Registered
Join Date: Jan 2013
Location: Australia
Posts: 176
|
Thanks Bob. The clutch is clean and works I believe. Relatively easy to turn one way and locks the other. Wondering why the pinion shaft won't fully retract. Have reassembled a few times and can't see why
|
||
|
11-23-2013, 10:00 PM
|
|
|
Registered
Join Date: Jan 2013
Location: Australia
Posts: 176
|
Any ideas?
|
||
|
11-24-2013, 02:44 AM
|
|
|
Registered
|
the selenoid have loaded spring Inside .It dirty to stiky or weak spring.Try to clean it or by new one.
|
||
|
11-24-2013, 03:23 AM
|
|
|
|
Registered
Join Date: Jan 2013
Location: Australia
Posts: 176
|
The solenoid spring is very good and its fires well. I suspect that it is the other bigger spring in the Bendix system. I thought that this might have been a problem for others as well - maybe not?
|
||
|
11-24-2013, 10:44 AM
|
|
|
Registered
Join Date: Jan 2013
Location: Australia
Posts: 176
|
Found an SR17X via VW and Porsche specialist locally. Was about to give up and order from the US. Many thanks for the advice.
|
||
|
11-24-2013, 06:37 PM
|
|
|
Registered
Join Date: Oct 2006
Location: MYR S.C.
Posts: 17,321
|
not familiar with the clunk you refer to, but go here for more on the starter
SOLENOID and STARTER rebuild......finally
__________________
86 930 94kmiles [_  _] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD88 BMW 325is 200K+ SOLD 03 BMW 330CI 220K:: [_ _] RUNNING: [__] NOT RUNNING:01 suburban 330K:: [_ _] RUNNING: [__] NOT RUNNING:RACE CAR:: sold |
||
|
11-25-2013, 04:05 AM
|
|
Harley
