How to get stuck bolts loose?

[pixelplay]

I am having an issues with the metal pipe that carries the water from the top radiator pipe to the heads that's located under the manifold.

The little cap at the rear of the one on my car is corroded and had sprung a leak. I need to remove that part but the bolts seem to have frozen themselves to the engine and I have already broken one trying to remove it. Does anyone have any ideas on how to get these undone without breaking them?

[loner]

http://drbritton.co.nz/break-away.html

[boon]

Wurth Rost Off is magical stuff as well.

A bit of heat never hurt either, if you've got some way of applying it in a controlled manner.

[pixelplay]

got the three unbroken ones out but the stupid rusted one caused lots of drama while I was trying to remove the 'metal water jacket' pipe thing. When i finally removed it I had a bit of bolt sticking out of the block so i got the vice grips onto it but being the stubborn bolt that it was it ended up braking a second time and now the only option left is going to be a drill bit and a bolt removing tool. Will let you all know how I get on.

[subieboy]

WD40 if that doesn't work

PB Blaster

[pixelplay]

 subieboy said:

WD40 if that doesn't work

PB Blaster

WD400 was all over it for two days before removing it. I think it needed PB blaster or something of that nature. I have bought a drill bit and bolt remover today and will remove it the good old fashioned way. Had a guts full of it breaking anyway and I will re-tap the holes later so i don't have that issue again.

[STiNGR]

 loner said:

http://drbritton.co.nz/break-away.html

Who stocks this in chch? I want a few bottles.

[boon]

 pixelplay said:

WD400 was all over it for two days before removing it. I think it needed PB blaster or something of that nature. I have bought a drill bit and bolt remover today and will remove it the good old fashioned way. Had a guts full of it breaking anyway and I will re-tap the holes later so i don't have that issue again.

Put some anti-sieze on them if you're worried.

Steel bolt into aluminium block = recipe for stuck ****.

[pixelplay]

 boon said:

Put some anti-sieze on them if you're worried.

Steel bolt into aluminium block = recipe for stuck ****.

Yes that's so true plus poor maintenance by previous owners hasn't helped. I will add anti-sieze for sure on these ones and if i remove the turbos or headers i will add some copper grease.

[pixelplay]

Out of interest I ended up drilling it out as it was too stuck for anything else. Got it fixed pretty quick once I did that. Just waiting on parts now to get it back together.