Exhaust Manifold - How to remove these studs?

johnyelland1234 · Sep 10, 2012

Hi all,

I have got myself a Steve Parkers exhaust and removed the old 2.25 downpipes which were connected to the 3.5 V8 manifolds.

On the N/S I snapped 2 of the 3 studs and on the offside I snapped 1 (very very old and snapped easily). The O/S has already been drilled through and doesn't need to be done.

Now here is a picture of the N/S manifold:

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I have ground the studs (there wasn't alot) and attempted to drill the studs out with my home drill (Cobalt drill bits).

Now it's being a total pain in the arse to drill out and will take forever.

Anyone have any tips on how to drill these studs out so that I can put bolts in their place?

Thanks in advance

crashbox · Sep 10, 2012

The bolts will drill out if you use a slow speed and dont force the drill. Try a small size first and work your way up.

trax · Sep 10, 2012

Yeah, you have to go SLOW.

lorri789 · Sep 10, 2012

It can take forever, but that's how I did it. Then I found the stud extractor.....

Paul D · Sep 10, 2012

Left handed drills often work well ..

crashbox · Sep 10, 2012

My late father-in-law told me that he was taught to cut leaf springs on a Morris Minor by hand using a hacksaw. The secret was to go extremely slow. Same when drilling, go slow, use some oil to cool it down.

dominicbeesley · Sep 11, 2012

Go slow and douse with water and 3-in-1 mixed with a small amount of fairy liquid.

I just did mine and helicoiled them myself, robbing bastard engineers wanted £20 a stud cos they said it would break loads of drill bits. I bought a set of good drills for £20 and used precisely 1! I did use a pillar drill though which helps as you can apply a steady and straight pressure.

I also got a helicoil set from RDG engineering and re-threaded them for new studs.

OZAWOZA · Sep 11, 2012

If you have access to a pillar drill or bench drill then it really will be easy...if using a hand drill then be prepared to use plenty of bits...start small and work up steadily or consider using screw in type stud extractor after heating up to loosen

johnyelland1234 · Sep 11, 2012

Thanks for all your answers.

I'll give it a go tomorrow with smaller bits and working my way up.

I was going at full speed too.

Failing that i'll see if I can find a work shop that can do it.

Can any garage get these studs out or does it have to be a special shop?

Thor1950 · Sep 11, 2012

in a case like that. a oxy torch works in heating and then let cool down to where you can touch it, this will make the steel softer. Or if you break a stud off before you grind it flush but a nut over it and weld it up, let cool down then use a 6point socket and should come out nicely.

Exhaust Manifold - How to remove these studs?

johnyelland1234

Member

crashbox

Well-Known Member

trax

.

lorri789

Well-Known Member

Paul D

Old, nackered 'n broke, but the Landy is fine . :)

crashbox

Well-Known Member

dominicbeesley

Well-Known Member

OZAWOZA

Active Member

johnyelland1234

Member

Thor1950

Well-Known Member

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