[Vwdiesel] Starter Motor

Sandy Cameron scameron at compmore.net
Fri Mar 22 15:46:11 EST 2002

At 12:24 PM 3/22/02 -0800, you wrote:
>This is the solenoid "latching" on.  It may work to disassemble it and clean
>it if it can be taken apart.  

I've done it. The solenoid core is a tight fit and can stick if dirty or
even if contaminated with heavy oil. This job takes a leisurely 2 hours, or
an accident prone hurry up hour.

Here's my posting from a year ago re: r&r on my A3 starter, which is the
same as the A2 starter.

Details: Starter R&R
1994 A3 TD Jetta

Funny noise when starting. Sounds like dry bushing/bearing chatter when engine
starts and bendix releases. Lasts for 1-2 seconds after engine starts until
motor stops spinning.
Confirmed with stethescope on rear end of starter.

This car is 7 years old, but has only 150,000Km (Less than 100,000 miles)
My 87 has 400,000km on it and its starter, which has never been opened, or
given any trouble. Same type.

Remove battery, battery pan, get wiring out of the way, get Pwr steering
reservoir out of way.
Disconnect cables from starter.
Using tranny jack and short length of 2x4 against oil pan (avoid oil pump bump
on bottom of pan) jack engine to just remove weight from front mount. (part
of starter bracket bolts. Nasty surprise if you don't jack it) Loosen 3
bolts holding starter and engine mount, and fine tune jack level so bolts
are free of binding.
Remove 3 bolts holding starter. Lots of room to work from above with battery
out and PS reserv. tied out of way.
Gently remove starter fron bell housing to bench.

Remove rear bearing cap, find gooey mess. Remove C washer, spacer washer.
Remove through bolts and back plate with bearing. Brushes and plate stay in
starter. :-)
Decide to go all the way. H---l of a time getting solenoid screws out,
finally heat with propane torch, loosen with impact screwdriver. Red stuff
on them must be locktite! (around heads). Disconnect motor cable from solenoid.
Get solenoid off, (catch that spring as it flies across the shop!) unhook
plunger from throwout arm 
Pull bendix/reduction gear asembly out of motor. Do not pull out armature
unless replacing brushes. (mine were barely worn)

Beautifull little planetary reduction gear, 3.5/1 ratio, grease in planetary
is all dry and chalky! Looks like bird dirt. Tortilla dough? Are the bosch
components assembled in Mexico too?

Rinse out goop and crud, bearings look ok, just dry. 
Inside of motor is dirty, dry crud. Clean it all out.
Put a little oil on bronze rear bush and replace back plate.replace washer
and C washer. Fill clean end cap with green grease and replace, squishing
some of the grease into the bearing.

Wash out inside of solenoid with WD40, wipe plunger/core with clean paper
towel (fits tight) oil it by wiping with oily paper towel. Dont use too much.
Wash old cruddy grease out of planetary, and inside front end of motor.
Clean bendix assembly. Wipe some grease on the bendix screw behind the
over-running clutch, and on the shaft at the front.

Pack a small amount of grease into planetary, DON'T fill it! Just enought to
get all gear surfaces greasy. put a dab in the pilot hole in the middle of
the planetary that the motor shaft goes into.

Stuff the planetary carrier (white plastic) into the motor, be sure it's
locating tabs are aligned properly . Leave the aluminum front end loose
until you hook the plunger loop over the end of the arm. You CAN'T do it
after assembly.

Once the plunger is hooked on, assemble carefully, the blue plastic arm
fulcrum widget fits against the square rubber block that fills the hole
between the motor and the front bendix housing. When all this stuff is
properly positioned, it all goes together easily. Replace motor through bolts.

wipe the solenoid core, insert the flying spring you caught earlier, fit the
core into the solenoid and push together, insert a screw to hold things in

Replace and tighten the 3 screws. snug up the motor through bolts.
Re-connect the motor cable to the solenoid. Wipe some grease on the front
shaft bearing, put a dab right on the end of the shaft so it will get pushed
into the bearing/hole in the bell housing.

Ready to replace it. Slip it into the bell housing as straight and centered
as possible.
My jack had sagged a bit while I was doing all this, so I fine tuned the
height so the bolts would slip right through to the mount and catch the
threaded holes without binding.

The bolts were cruddy with white aluminum crud when they came out, so I
buffed them clean and wiped them with a thin coat of grease before replacing

Went together slick as snot on a doorknob.

Dressed all wiring, replaced the battery, tried it out, How sweet it is.
Will probably last the life of the car with real grease instead of guanno in it.

Would have ground up the bushing quickly if I had left it, and $300-$400 to
replace the starter.

Now where did I put the radio code?


More information about the Vwdiesel mailing list