Seized caliper bolts

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
As far as I can remember it is the part that is threaded not the caliper.

My bolts would not come out. I ended up cutting my caliper in half to get to the rear of the bolt. Mine required heat, penetrating fluid, drilling the bolt from the the rear to about 6.5mm diameter and still I broke one socket extractor before finally getting it out with the second.

You need to check the bolt as to which thread it has - earlier are coarse and later fine. Make sure you know which thread you have before clearing your threads with a tap/thread chaser.

This is the rear of the bolt drilled 6.5mm as I thought it may reduce the strength of the bolt and allow it to turn. It still needed heat and penetrating fluid.
20220130_135542.jpg


This is the difference between the threads on older axles compared to the fine threaded bolts on the later axle. I think the change came around the 200tdi to 300tdi but can't tell you 100%

20220130_142927.jpg
20220130_142946.jpg
 
Just for a bit more detail on what I delt with for you to understand the difference in bolts.

I did both swivels and both calipers. The side that wouldn't come off had the original early M12x1.25 bolts. I had purchased the wrong ones so had to buy another set to fit the caliper - however, I took of and refitted the caliper on the opposite side, but when it came to torque the bolts they wouldn't. They just spun in the hole. When I looked at the bolts I took out, the caliper on that side had been incorrectly fitted with the fine threaded bolts so I had to unfortunately fit helicoils on that side to repair the thread!

So, make sure you check the thread on your bolts!! Also note the coarse thread bolts had spring washers.
20220224_192838.jpg
 
Dr Strangeglove said:
Just for a bit more detail on what I delt with for you to understand the difference in bolts.

I did both swivels and both calipers. The side that wouldn't come off had the original early M12x1.25 bolts. I had purchased the wrong ones so had to buy another set to fit the caliper - however, I took of and refitted the caliper on the opposite side, but when it came to torque the bolts they wouldn't. They just spun in the hole. When I looked at the bolts I took out, the caliper on that side had been incorrectly fitted with the fine threaded bolts so I had to unfortunately fit helicoils on that side to repair the thread!

So, make sure you check the thread on your bolts!! Also note the coarse thread bolts had spring washers.View attachment 298993
Click to expand...
Appreciate the image. Hopefully someone searching for this one day can access this and see that!

Did the washer go onto the top or bottom bolt if you can remember?
 
As the OP has new calipers to fit, all he needs is a thread gauge to ensure he gets the right bolts, but as has been said the later ones should be the right ones.
He can massacre the old bolts/calipers to get them off.

"Pass the angle grinder!"
 
Stanleysteamer said:
As the OP has new calipers to fit, all he needs is a thread gauge to ensure he gets the right bolts, but as has been said the later ones should be the right ones.
He can massacre the old bolts/calipers to get them off.

"Pass the angle grinder!"
Click to expand...

I'd just have to pick the right size grinder.. 9" cut the defender up and take to the tip

I did the other day do some rear shocks.. previous owner.. well all i can say is that when they did it they left the previous previous shocks washer in so it was ****ed.. i used a dremel to cut it out
 
RustyDefender said:
Anywhere I can get those caliper holding bolts tomorrow? Do you also have a part number for them
Click to expand...

SYP500090 - Bolt, M12 x 35 - Find Land Rover parts at LR Workshop

Bolt, M12 x 35 (SYP500090) is currently priced from £0.97 to £159.61 across OEM, Pattern and Genuine brands like Allmakes and Land Rover and appears in 6 diagrams. Find out more information on LR Workshop. Also known as: Caliper assy to set pad, Bolt, M12 x 35
www.lrworkshop.com www.lrworkshop.com

….might be these, but use this resource with your VIN and you’ll get the right Bits.

Sounds like you’ll be visiting the site quite often….
 
slomofo said:

SYP500090 - Bolt, M12 x 35 - Find Land Rover parts at LR Workshop

Bolt, M12 x 35 (SYP500090) is currently priced from £0.97 to £159.61 across OEM, Pattern and Genuine brands like Allmakes and Land Rover and appears in 6 diagrams. Find out more information on LR Workshop. Also known as: Caliper assy to set pad, Bolt, M12 x 35
www.lrworkshop.com www.lrworkshop.com

….might be these, but use this resource with your VIN and you’ll get the right Bits.

Sounds like you’ll be visiting the site quite often….
Click to expand...
Yeah however.. what i've learnt is to not even trust the VIN when you know a previous owner has clearly installed bits here and there
 
apply loads of heat to the caliper not the bolt disconnect brake pipes ,you could try inpact gun but make sure socket is tight fit
 
Stanleysteamer said:
I am guessing post #16? I hadn't blown the pic up to see him holding one of them. Wrong balls???!! Wrong bolts maybe!!
Click to expand...

Nope his landy keeps giving :). But he will get there.

www.landyzone.co.uk

Swivel housing experts needed

Hey guys, I've taken off my swivel, notice that the one i've pulled out has this part... any context? I ordered.. https://www.ebay.co.uk/itm/354174738325 Which doesn't have this part.. I jumped the gun at ordering parts before I took the thing off! Have I got the wrong one? I did order the...
www.landyzone.co.uk www.landyzone.co.uk

J
 
marjon said:
Nope his landy keeps giving :). But he will get there.

www.landyzone.co.uk

Swivel housing experts needed

Hey guys, I've taken off my swivel, notice that the one i've pulled out has this part... any context? I ordered.. https://www.ebay.co.uk/itm/354174738325 Which doesn't have this part.. I jumped the gun at ordering parts before I took the thing off! Have I got the wrong one? I did order the...
www.landyzone.co.uk www.landyzone.co.uk

J
Click to expand...
Watch this space.. its basically another day another problem atm
 
robbie the greatl said:
apply loads of heat to the caliper not the bolt disconnect brake pipes ,you could try inpact gun but make sure socket is tight fit
Click to expand...

The caliper isnt threaded so the heat needs to be applied to the hub & with it glowing have the right sized 6 sided
impact socket and an old extension, lump hammer to shock the bolt then scorch it again then use a breaker bar.
It wont help now its off the vehicle (for leverage). If he cant get it out ive got a couple of spare hubs.
 
You must log in or register to reply here.

Similar threads

V
TDCI 2007 What is this for?
Replies
0
Views
211
vtwin
V
K
Hub nut stuck
Replies
18
Views
893
tottot
tottot
S
Defender 90 rear shock lower bush replacement
Replies
10
Views
1K
dag019
dag019
miktdish
Wing mirror arms ...
Replies
10
Views
1K
miktdish
miktdish
A
Wish I hadn't started this job!
2
Replies
22
Views
2K
KISSMYAURA
KISSMYAURA
Back
Top