101 replies to this topic

[Gremlin]

Anti

[KernowCooper]

By putting pressure anticlockwise you just risk undoing the nut, as you've already been told by Doug and others the rocking in gear will exert more force than you will on the crankshaft nut, there is no quick fix and years ago I had the same with a mates MF T20 which had been left standing with water in the bores, this took several weeks, but the diesel did the trick. If you break a ring in haste then its strip down time, be interesting to see what the bore is like when it does free off

Edited by KernowCooper, 18 February 2014 - 01:24 AM.

[Rog46]

Put it in first instead of second, it'll put more force on the engine, just be careful when trying to turn the engine over you don't just simply undo the crank bolt, not a disaster if you do but not ideal if your jumping on it and then it suddenly goes.
Also you say the car is pointing uphill, put it in 1st as i said and then put your socket and breaker bar on the crank bolt and hang a weight off the end of the breaker as if your undoing it, it'll put a bit more force on and there's no danger of stupidly overtightening it making it difficult to undo if/when you ever need to

No in first gear the engine has more leverage over the wheels ie. the wheels have LESS leverage over the engine (think of a simple lever) In fourth gear the wheels have most leverage over the engine. (TEST - with any car try moving it by hand in 1st , then try it in top)

[Gremlin]

Put it in first instead of second, it'll put more force on the engine, just be careful when trying to turn the engine over you don't just simply undo the crank bolt, not a disaster if you do but not ideal if your jumping on it and then it suddenly goes.
Also you say the car is pointing uphill, put it in 1st as i said and then put your socket and breaker bar on the crank bolt and hang a weight off the end of the breaker as if your undoing it, it'll put a bit more force on and there's no danger of stupidly overtightening it making it difficult to undo if/when you ever need to

No in first gear the engine has more leverage over the wheels ie. the wheels have LESS leverage over the engine (think of a simple lever) In fourth gear the wheels have most leverage over the engine. (TEST - with any car try moving it by hand in 1st , then try it in top)

It's not levers it's ratios of how many times the engine turns:wheels turn, so in first it'll put more force on the engine

[Captain Mainwaring]

 

 

Put it in first instead of second, it'll put more force on the engine, just be careful when trying to turn the engine over you don't just simply undo the crank bolt, not a disaster if you do but not ideal if your jumping on it and then it suddenly goes.
Also you say the car is pointing uphill, put it in 1st as i said and then put your socket and breaker bar on the crank bolt and hang a weight off the end of the breaker as if your undoing it, it'll put a bit more force on and there's no danger of stupidly overtightening it making it difficult to undo if/when you ever need to

No in first gear the engine has more leverage over the wheels ie. the wheels have LESS leverage over the engine (think of a simple lever) In fourth gear the wheels have most leverage over the engine. (TEST - with any car try moving it by hand in 1st , then try it in top)

It's not levers it's ratios of how many times the engine turns:wheels turn, so in first it'll put more force on the engine

 

Mechanical advantage = rotations of driven/rotations of drive
In this case gear ratios are reversed.
I don't know about anyone else, but when I want to bump an engine over for setting valve clearances....I put the car in the highest gear I can find and get the best mech advantage I can.- probably works different with Minis though

[greenwheels]

 

 

 

Put it in first instead of second, it'll put more force on the engine, just be careful when trying to turn the engine over you don't just simply undo the crank bolt, not a disaster if you do but not ideal if your jumping on it and then it suddenly goes.
Also you say the car is pointing uphill, put it in 1st as i said and then put your socket and breaker bar on the crank bolt and hang a weight off the end of the breaker as if your undoing it, it'll put a bit more force on and there's no danger of stupidly overtightening it making it difficult to undo if/when you ever need to

No in first gear the engine has more leverage over the wheels ie. the wheels have LESS leverage over the engine (think of a simple lever) In fourth gear the wheels have most leverage over the engine. (TEST - with any car try moving it by hand in 1st , then try it in top)

It's not levers it's ratios of how many times the engine turns:wheels turn, so in first it'll put more force on the engine

 

Mechanical advantage = rotations of driven/rotations of drive
In this case gear ratios are reversed.
I don't know about anyone else, but when I want to bump an engine over for setting valve clearances....I put the car in the highest gear I can find and get the best mech advantage I can.- probably works different with Minis though

 

No - it's just the same. There is more mechanical advantage from 4th gear to turn the engine over.

[dklawson]

Agreed.

 

To the OP... I know it is hard waiting for things to soak in and break loose but as others have cautioned, rushing this will result in broken rings and that will be an engine-out repair (or replacement).

[fattasss]

its definetly a wait game, im checking the bores few hours and topping up the diesel as required,

might try some ATF tomoro, for a faster result,...

[dklawson]

You can also try whatever the preferred brand of penetrating oil is in the U.K.  The idea is to let the lubricant get into all the crevices and soften the rust. 

 

Keep us posted on your progress.

[KernowCooper]

Diesel in my opinion is better than ATF at sorting out rust

[Captain Mainwaring]

 

 

 

 

Put it in first instead of second, it'll put more force on the engine, just be careful when trying to turn the engine over you don't just simply undo the crank bolt, not a disaster if you do but not ideal if your jumping on it and then it suddenly goes.
Also you say the car is pointing uphill, put it in 1st as i said and then put your socket and breaker bar on the crank bolt and hang a weight off the end of the breaker as if your undoing it, it'll put a bit more force on and there's no danger of stupidly overtightening it making it difficult to undo if/when you ever need to

No in first gear the engine has more leverage over the wheels ie. the wheels have LESS leverage over the engine (think of a simple lever) In fourth gear the wheels have most leverage over the engine. (TEST - with any car try moving it by hand in 1st , then try it in top)

It's not levers it's ratios of how many times the engine turns:wheels turn, so in first it'll put more force on the engine

 

Mechanical advantage = rotations of driven/rotations of drive
In this case gear ratios are reversed.
I don't know about anyone else, but when I want to bump an engine over for setting valve clearances....I put the car in the highest gear I can find and get the best mech advantage I can.- probably works different with Minis though

 

No - it's just the same. There is more mechanical advantage from 4th gear to turn the engine over.

 

 

I think that's what I said :-D It was after all simple mechanics.

[Captain Mainwaring]

A bit of heat with a big flame like a roofers torch wouldn't hurt much either.

[Captain Mainwaring]

 

 

Put it in first instead of second, it'll put more force on the engine, just be careful when trying to turn the engine over you don't just simply undo the crank bolt, not a disaster if you do but not ideal if your jumping on it and then it suddenly goes.
Also you say the car is pointing uphill, put it in 1st as i said and then put your socket and breaker bar on the crank bolt and hang a weight off the end of the breaker as if your undoing it, it'll put a bit more force on and there's no danger of stupidly overtightening it making it difficult to undo if/when you ever need to

No in first gear the engine has more leverage over the wheels ie. the wheels have LESS leverage over the engine (think of a simple lever) In fourth gear the wheels have most leverage over the engine. (TEST - with any car try moving it by hand in 1st , then try it in top)

It's not levers it's ratios of how many times the engine turns:wheels turn, so in first it'll put more force on the engine

 

 

Levers are ratios .....Anticlockwise moments/Clockwise moments = ratio

[Dusky]

A bit of heat with a big flame like a roofers torch wouldn't hurt much either.

Cough* fire + diesel *cough*

[clubman1976]

 

A bit of heat with a big flame like a roofers torch wouldn't hurt much either.

Cough* fire + diesel *cough*

 

Diesel is only really flammable under compression.  It certainly wont ignite when you try with a lighter! (misspent youth)  Okay, a roofers torch would produce enough heat to ignite it.  But not if you're careful