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Spigot Bush Help Needed

MZTRBO
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260tech Proficient

260tech

Posted
Posted
PLYNX,

What diameter was the wooden dowl.

Didnt think wood would work so well, but it can be forced in there for a tight fit so makes good sense.

Cheers

Hi there, the battle of the spigot bush hey? Hopefully you have triumphed by now but if not here's my 2c.

In the past I have found that grease works a treat on brass bushes which are "press fitted in place", grease plug behind wooden dowel gotta be a slip/slide not tight fit (else just force bush in further) to prevent grease escaping as much as possible, belted with a BF hammer creates a massive momentary hydraulic shock behind said bush, be sure to place rag over ejection point for escaping grease else you may wear it, never had anything to do with steel bushes however it sounds like maybe your steel bush has been "shrink fitted/pressed in" & is a whole heap tighter. In any case brass bushes are no way as hard as steel & do not grab to the same extent as a consequence.

Shrink fitted bushes I have dealt with in the past have typically been "rear axle wheel bearing retainer rings which need to be busted off. Ground/grind down thin in one place to the point where they can be flexed/fractured/split with a cold chisel & hammer to weaken metal to metal contact then slipped off & discarded. If this is your problem then maybe grind a groove that can then aid in splitting the bush, followed by the above grease extraction method to pop the weakened bush?

Maybe a dremel & small stone will get the grinding/grooving done? Hacksaw blade width x2 would be enough to spring the bush to crack it imho.

Plan B: Machine nice friendly porous (pre-oil impregnated) brass spigot bush to press fit inside nasty steel bush & continue overhaul? Assuming torque convertor shaft is several times the diameter of gbox front halfshaft? :(

Good luck.

GW

antz69 Community Regular

antz69

Posted
Posted

hi, converted a mate of mines from auto to manual and knew that this would be a problem before i even started the job, it took me about an hour of hitting, cutting, you name it...tried with grease and no luck at all so i persisted with cutting the bush...btw i had the car on the hoist. ended up using an air saw to cut it just before u cut right through the bush, then used a chisel to crack the bush where it was cut...after that it came out easy as.

probably not the safest method becuase if you cut too far you will damage the crank shaft..

good luck with it

MZTRBO Experienced

MZTRBO

Posted
  • Author
Posted

Hi,

this is the reason why i havent used that method yet, i dont want to replace the crankshaft.

thanks for the reply.

cheers

hi, converted a mate of mines from auto to manual and knew that this would be a problem before i even started the job, it took me about an hour of hitting, cutting, you name it...tried with grease and no luck at all so i persisted with cutting the bush...btw i had the car on the hoist. ended up using an air saw to cut it just before u cut right through the bush, then used a chisel to crack the bush where it was cut...after that it came out easy as.

probably not the safest method becuase if you cut too far you will damage the crank shaft..

good luck with it

MZTRBO Experienced

MZTRBO

Posted
  • Author
Posted

ahaha..tried a bush puller tonight and it still didnt bloody work..the groove was to thin for the puller to get into if that makes sense..

Just going to use the die grinder now and see how it goes...

Bloody steel bushes, this ones in there to stay :thumbsup:

Cubes Grand Master

Cubes

Posted
Posted

The RB30 I bought had the auto spiggot as did a mates.

For both I used the grease method; I use a socket with a couple of small extension bars out of one of those $5 small socket sets from supercrap auto's. From memory the auto spiggot wasn't a perfect fit to the socket and a little grease did push out around it; but keep on hammering and it will come out. I use a small short handle sledge hammer. :P

The auto was definitely harder than the manual but keep at it and put some force in to it.

PLYNX Mentor

PLYNX

Posted
Posted

Sorry guys and gals aint been lookin in this section lately !

MZTRBO dont remember the diameter of the dowl. Just got one that was a little over size just started trimming it down so it was a very tight fit then used the grease method a big hammer. Speed is your friend here, if you can hit it hard and fast all the better. As 260tech said the hydrolic shock usually does the job.

MZTRBO Experienced

MZTRBO

Posted
  • Author
Posted

YAY ...got it out...

Got a compressor and used a crystal head with a die grinder, ground it out and it ended popping out.

All the other methods were used and I had somebody helping me that has done many autos and they said this one was in there extremely tight?

None the less its out and the jobs almost finished.

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