Series 3 Winterised 109, cannot separate engine/gearbox

TheDarkPassenger · Nov 9, 2015

Hi,

We've come across a bit of a snag removing an engine from an ex military winterised LR.

It seems that the engine and gearbox are bonded together with some magical sealant that is resistant even to brute force and ignorance!

Does anyone have any knowledge about what these units are bonded together with and more importantly how to get them apart!!??

blue beasty · Nov 9, 2015

Should be a gap in the mating surfaces near the starter, just above iirc, that you can use to start to lever them apart.

boguing · Nov 9, 2015

Dental floss is good at cutting through mastic seals.

But - you have got the nut off the input shaft, haven't you?

Edit. B*llocks, misread it, sorry. Thought you meant transfer box and gearbox stuck together.

Guessing that the shaft to clutch splines are rusty?

Sawing with dental floss tip works on mastic though. Best way to get the sump off an Alfa 156.

John S · Nov 9, 2015

Boguig has simply observation. Engines n gearboxes ain't bonded together. It defies logic. There will be a simple engineering reason but not a bonding.

davebeccles · Nov 9, 2015

Don't know if these images help but they may shed some light somewhere. Its a '83 ex mil 109.

Once I had released all the bolts then it dropped off after a clout with a rubber mallet.

TheDarkPassenger · Nov 10, 2015

John S said:
Boguig has simply observation. Engines n gearboxes ain't bonded together. It defies logic. There will be a simple engineering reason but not a bonding.

Can you elaborate? This has been sealed everywhere, I'm passing on 2nd hand information from the chap that's doing the work for me (and no I'm not paying him, so he's no reason to steer me the wrong way)

freelance · Nov 10, 2015

Sounds lik a job for brute force and ignorance, unless there is still a bell housing bolt in place!

samc88 · Nov 10, 2015

Are all the nuts off? Its possible you could have missed one. Also a stanley blade can be used to remove mastic. For a brute force approach use a fox wedge between tge engine and gearbox to get them apart

divie · Nov 10, 2015

If you are really sure all the nuts are off then start trying to spray the clutch splines. Maybe a piece of screen jet tube on a squeezy washing up bottle,
the clutch plate will be knackered anyway and that is all that can hold it on.

Dippypud · Nov 10, 2015

Maybe glooped full of silicone to stop leaks or whatever ....

The dental floss approach will not work because of the studs left in...but may help to get through some of silicon if it's there ...
A slow and steady approach may be best ...

jamesmartin · Nov 10, 2015

John S said:
Boguig has simply observation. Engines n gearboxes ain't bonded together. It defies logic. There will be a simple engineering reason but not a bonding.

series engines and boxes are a spigot fit they do corrode fast, its often wise to use the clutch so break the hold before fully stripping the units out

robertcoby · Nov 10, 2015

Try tapping a thin blade paint/paper scraper all round

ronsealdeath · Nov 10, 2015

BFH all the way

Castor · Nov 13, 2015

Dynamite.

TheDarkPassenger · Nov 13, 2015

Castor said:
Dynamite.

It must be Friday night, after beer o' clock

Series 3 Winterised 109, cannot separate engine/gearbox

TheDarkPassenger

Member

blue beasty

Leaks an prone to bits dropping off

boguing

Well-Known Member

John S

Well-Known Member

davebeccles

Active Member

TheDarkPassenger

Member

freelance

Well-Known Member

samc88

Drivels spiritual representative

divie

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Dippypud

Never Knowingly Understood

jamesmartin

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robertcoby

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ronsealdeath

Sagging Member

Castor

Trainee maniac

TheDarkPassenger

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