Rusty manifold nuts

another forum · Feb 23, 2013

Got a decat downpipe,nuts are seized solid and need heat.i haven't got access to oxy/acet gear.has any one tryed mapp gas as I heard its quite good.

Pikey · Feb 23, 2013

I use Mapp on me plumbing blowtorch. and yes it gets very very hot.

Oldseadog · Feb 23, 2013

Split them off and replace with brass ones!

TD5power · Feb 23, 2013

have you tried using alot of wd40 to try and free the nuts off?

another forum · Feb 24, 2013

Tryed wd40 with heat from a standard blow lamp.the nuts are at the stage,age wise of rounding off and risk of snapping the studs if brute force is used.
Cannot get a nut splitter on as they are flanged
Im going to look into access for a grinder to cut upwards on the side of the nut.
Its a job that needs doing as the flexy joint is starting to leak

Thor1950 · Feb 24, 2013

if you can get a small grinder to the nut, grind 1 side of the flat just to the threads, then use a 6 point socket or spanner to get it off. always use 6 point tools on any exhaust work

abcdedd · Feb 24, 2013

spanner, breaker bar and snap them off?

another forum · Feb 24, 2013

Thor1950 said:
if you can get a small grinder to the nut, grind 1 side of the flat just to the threads, then use a 6 point socket or spanner to get it off. always use 6 point tools on any exhaust work

that is what im going to try.i have got some 1mm thick cutting discs that should **** through the nuts provided there is enough room to get the grinder in.

Dr_evil · Feb 24, 2013

dremel with cutting disc fit ?

chris07 · Feb 24, 2013

how about a nut splitter

abcdedd · Feb 24, 2013

another forum said:
Tryed wd40 with heat from a standard blow lamp.the nuts are at the stage,age wise of rounding off and risk of snapping the studs if brute force is used.
Cannot get a nut splitter on as they are flanged
Im going to look into access for a grinder to cut upwards on the side of the nut.
Its a job that needs doing as the flexy joint is starting to leak

chris07 said:
how about a nut splitter

:doh::smash:

livers · Feb 24, 2013

Could try one of these

not sure what they are called

another forum · Feb 24, 2013

Nut splitter,no use really as the nuts are flanged.

Dr_evil · Feb 24, 2013

Cold chisel fit on ? If the nuts small enough you might be able to get it to cut through if not how about some of that heat spray or freeze with co2 then hit with chisel

another forum · Feb 24, 2013

Thanks for all your input,folks
I'm going out to it now to suss the job out,one way or another its got to be done.

Oldseadog · Feb 24, 2013

I finished up drilling all mine out and replacing them with studding, and fitting RSJ tapered washers on the tops.
Simple solution if all else fails!

another forum · Feb 24, 2013

Oldseadog said:
I finished up drilling all mine out and replacing them with studding, and fitting RSJ tapered washers on the tops.
Simple solution if all else fails!

That will be the last resort

Dr_evil · Feb 24, 2013

Could always just slice it off with grinder to get more room then a 1mm through the stud so the nuts fall off followed by stud extractors as there'll be space then

another forum · Feb 24, 2013

Well here goes.....,

another forum · Feb 24, 2013

Attacked from underneath with breaker bar plus extensions,the tell tale squeek,a shot of wd40 and unscrew the studs...happy days and the decat pipe don't half make a difference

Rusty manifold nuts

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