Help needed stubborn bolts!

[Mike_89]

I've managed to remove stubborn bolts on my suspension. However, I need to remove the Brembo Calipers to replace brake discs etc.

 

I have tried soaking the bolts in WD-40 and still unable to crack them. I am a little worried about applying heat to the caliper bolts because of brake fluid and seals etc.. Can anybody offer any advice in removing these crazy stubborn bolts?

[Mopedmark]

First off have you got a breaker bar ? This will give you far superior leverage but just make sure that the socket is a very good fit tap it on to make sure you will be surprised how much this will help, also, the bar will help more if it's over 2 foot long

[Mike_89]

First off have you got a breaker bar ? This will give you far superior leverage but just make sure that the socket is a very good fit tap it on to make sure you will be surprised how much this will help, also, the bar will help more if it's over 2 foot long

 

Yep I have a breaker bar, but its just over a foot. Still not budging 😠

[ZMANALEX]

The fronts tend to be very tight sometimes.

 

As has been said, use a good quality socket that will not slip.

 

Use a 600mm breaker bar, and get the leverage angle right, and you will be on the home straight.

Edited May 2, 2016 by ZMANALEX

[richard.hezlett]

If still having no luck mix acetone and automatic transmission fluid 50:50 in a sprayer bottle. Shake well to get them to mix. Then spray on, wait a while and then hopefully bobs your uncle.

 

[Mike_89]

Thanks guys, will give everything a try. Hopefully all will be good and I have knuckles after it all haha.

[Lexx]

Also ditch the WD-40 and get some decent penetrating fluid such as Plus-Gas.

[Commander]

physics is your friend... use a longer breaker bar!

[Ricey]

as said a foot long breaker bar isnt going to cut it. Its not far off the size of a ratchet!

 

2ft long minimum and a good angle.......doing this on the deck is going to make it significantly more tricky

[Ebized]

Piece of scaffold pole over your 'stubby', after a dose of the plus gas on the bolts, should help

 

I would also use a six sided socket to help avoid rounding off the bolts.

[Paul K]

If still having no luck mix acetone and automatic transmission fluid 50:50 in a sprayer bottle. Shake well to get them to mix. Then spray on, wait a while and then hopefully bobs your uncle.

 

Sounds a bit like the "bikeman4u" special sauce

[GMballistic]

Another trick you can try;

 

Using your breaker bar ~ firstly try to tighten the bolts up a little, ...then go to undo them.

[Floydbax]

I used physics to do mine too, lowering the car on the jack with the breaker bar braced, just a couple of millimeters is enough to 'crack' the bolt. The brake bolts aren't rusted on as they are alloy, but they are freakin' tight. Once you have done it you will wonder what all the fuss was about I used the 'lowering on the jack' method to make sure they're tight on replacement too

[-Bradders-]

Just a heads up sounds silly but make sure you are undoing not tightening I made that mistake and snapped the bolt lol

[Husky]

I used the 'lowering on the jack' method to make sure they're tight on replacement too

I'd be using my big torque wrench to put them back on instead of going for FT; there is such a thing as over tight and it can be as bad as leaving them too loose.

 

I would also use a six sided socket to help avoid rounding off the bolts.

Also, this 100x over.

 

One of these

 

 

Is far better than one of these