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#4664214 - 02/12/18 06:51 PM How to clean gearbox bellhousing
Nrok83 Offline

Registered: 06/12/17
Posts: 17
Loc: Florida
Hello all,
Today I pulled out my gearbox to my bmw 135i for a clutch replacement. The inside is dirty and I'd like to clean it up before new parts go in. I'd like to know what I can use to fix xlean up the inside of my bell housing? The following link at 9 minutes and40secs the mechanic uses a spray and does a pretty good cleaning up the housing. I did call the company whom performed the clutch replacement in that video but no one knows. It looks like it was mixed, because if it was brake cleaner it'd be from a can. Any idea on what I can use ?

#4664220 - 02/12/18 06:54 PM Re: How to clean gearbox bellhousing [Re: Nrok83]
Lubener Offline

Registered: 01/22/11
Posts: 2449
Loc: N.Ohio
Use brake cleaner..CRC or supertech will clean it up.

Edited by Lubener (02/12/18 06:56 PM)
The "thinking" man's friend.

#4664222 - 02/12/18 06:57 PM Re: How to clean gearbox bellhousing [Re: Nrok83]
Trav Offline

Registered: 11/20/06
Posts: 17886
Loc: MA,
ASE L1, Master. Deutsch Meisterbrief.

#4664262 - 02/12/18 07:45 PM Re: How to clean gearbox bellhousing [Re: Nrok83]
andyd Offline

Registered: 09/25/04
Posts: 6749
Loc: Marshfield , MA
I need all the brain cells I have left. I think I would try some Simple Green type stuff, some hot water and a stiff brush. How clean does a bell housing need to be? Back in the old days there was a 5 gallon bucket with a gallon or so of leaded gas in it. We pre-cleaned with that. E 10 is like bath soap compared to reg'lar. Also there was a nasty parts cleaner, you mixed with kerosene. It was a petroleum based detergent like floor wax stripper.
'16 Camry LE STP synth 0w20 and STP filter.

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline bulk 0w20 and ? filter

#4664297 - 02/12/18 08:19 PM Re: How to clean gearbox bellhousing [Re: Nrok83]
das_peikko Offline

Registered: 01/01/18
Posts: 373
Loc: San Antonio, TX
I'd use maroon scotch-brite dipped in mineral spirits. Final rinse with brake clean.
For small areas I'd use an acid brush and tooth brush dipped in mineral spirits.
Lots of shop towels to soak up the grime/mineral spirits soup.

#4664327 - 02/12/18 08:52 PM Re: How to clean gearbox bellhousing [Re: Nrok83]
red7404 Offline

Registered: 01/24/18
Posts: 100
Loc: KS
gasoline is for washing car parts, alcohol is for drinking, nitro is for racing.

Edited by red7404 (02/12/18 08:52 PM)

#4664340 - 02/12/18 09:07 PM Re: How to clean gearbox bellhousing [Re: andyd]
Linctex Offline

Registered: 12/31/16
Posts: 5233
Loc: Waco, TX
Originally Posted By: andyd
I need all the brain cells I have left. I think I would try some Simple Green type stuff, some hot water and a stiff brush.

^^^^ THIS ^^^^

It's a bellhousing.
It's never has to be "super clean"
because there is NO NEED for it to be.

Not rocket science, here....
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

#4664453 - 02/13/18 01:29 AM Re: How to clean gearbox bellhousing [Re: Nrok83]
Ducked Offline

Registered: 10/25/12
Posts: 3846
Loc: Taiwan
Old brake fluid, then water.

Or maybe not bother.

#4664466 - 02/13/18 02:45 AM Re: How to clean gearbox bellhousing [Re: Nrok83]
rooflessVW Offline

Registered: 12/24/11
Posts: 3512
Loc: North Carolina
Just take it to a coin-op and pressure wash the thing.

It'll be good enough.
"Zed's dead baby, Zed's dead."

#4664661 - 02/13/18 09:58 AM Re: How to clean gearbox bellhousing [Re: Nrok83]
BrocLuno Offline

Registered: 09/06/15
Posts: 5078
Loc: Kalifornia Kollective
Kerosene and a brush ...
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.