MGB Stub Axles.. new v's old

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Stephen Auty
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MGB Stub Axles.. new v's old

Post by Stephen Auty » Sun Nov 22, 2020 9:23 am

Hi.
This is my first post , I've been in communication with Stuart many times and he's been brilliant at providing me with his knowledge and experience.

I'm just starting to get things moving having placed an order with Gerry a couple of months ago and although it's going to be more than a year before i get the car, iv'e started on the engine (Ford 302) and now just received a pile of MGB parts to clean up.

Just in the process of removing the stub axles from the suspension parts and looking at the work involved to re bush and set them up (via Andrew's video on Youtube) it doesn't seem worth the time and cost when you can buy a new set from MGB Hive for £130 each. But are they any good?

Has anyone any experience of these new components as I know from my motorbike builds much of the new stuff coming from the Far East is sub standard and very cheap for that reason but I have no idea if these are indeed made in India/China?

Seems to be the same for the hubs but I know these are a quality part made in the UK so it seems like a no brainer to put new hubs to new wheels..right?

So with regards to the front end the only part I might use is the steering arm! as I'm going for the coil over suspension package.

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kdavies3
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Re: MGB Stub Axles.. new v's old

Post by kdavies3 » Sun Nov 22, 2020 10:30 am

I bought some new track rod ends from MGB Hive before the car even moved off my build ramp the rubbers rotted out and collapsed.
I'm only talking a few months here.
They replaced the joints of course, they said they'd never had it before.
I know that I hadn't wiped them with anything that may have caused it.
Maybe a bad batch of rubber?
I agree it's a fine line between rebuilding the old and buying new.
You can buy brand new Princess 4 pot calipers cheaper than buying the parts to rebuild original ones.
Kev Davies
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In build Hawk 289 (302) Sebring. Awaiting IVA:D

Stephen Auty
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Location: Selkirkshire

Re: MGB Stub Axles.. new v's old

Post by Stephen Auty » Sun Nov 22, 2020 11:03 am

I know what you mean, anything rubber I have bought for my bikes just rot away.
Caliper bleed nipple covers for my Yamaha from eBay basically disintegrated in under a year , the original ones lasted 30yrs and just looked tired.

I want to use the old stuff and recondition it but when you see that it hardly seems worth it.
You wonder what the metal quality is like and the tolerances
If I can borrow a reamer from someone along with a large tap handle I'll give it a go I think.

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StewbieC
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Re: MGB Stub Axles.. new v's old

Post by StewbieC » Mon Nov 23, 2020 9:05 am

You may even find that your stub axles are fine and don't need any work other than a good clean and new rubbers and cupped washers on the lower trunion and replacement bushes on the top. They are so simple to remove if they need work in the future.
In Birmingham we say "If it aint bost, doh fix it!"
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Hawk 289, maximum smiles per mile..

Stephen Auty
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Re: MGB Stub Axles.. new v's old

Post by Stephen Auty » Mon Nov 23, 2020 10:18 am

That was my thought too but there is some play there but it might be the wheel bearings , I'll find out soon.

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David Large
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Re: MGB Stub Axles.. new v's old

Post by David Large » Tue Nov 24, 2020 8:32 am

I regularly get an advisory about play in the front wheel bearings by younger MOT testers. Taper roller bearings need a tiny amount of play or they overheat and seize up. My car has done 60,000 miles in 30 years without any problem and no rubbers replaced.

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peterc
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Re: MGB Stub Axles.. new v's old

Post by peterc » Wed Nov 25, 2020 1:05 pm

I agree with David. If there is no play at all when trying to rock the wheel from top to bottom then it’s too tight.
Basically the taper bearings need 0.001” end float and that translates into noticeable rocking of the wheel.
I got used to detecting the correct amount of play on my Ford front wheels. The MGB set up is just the same.
Peter C

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clive
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Re: MGB Stub Axles.. new v's old

Post by clive » Wed Nov 25, 2020 1:37 pm

According to the Haynes Manual, the wheel bearing end float should be 0.002 to 0.004 ins, (0.05 - 0.1mm)
Cheers, Clive.

(If I'm not here I'm in my workshop or on the golf course!)

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peterc
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Re: MGB Stub Axles.. new v's old

Post by peterc » Wed Nov 25, 2020 7:30 pm

I stand corrected. That will translate into even more apparent free play when testing the wheel movement.
I confess I quoted the 0.001” from memory and the Ford tolerances may well be tighter.
Peter C

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clive
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Re: MGB Stub Axles.. new v's old

Post by clive » Wed Nov 25, 2020 7:38 pm

Not the easiest of bearings to set up, but there are plenty of videos showing how to adjust the end float using shims. One thing you want to avoid is the modern way of torquing up the nut and easing off a flat on the nut.
Cheers, Clive.

(If I'm not here I'm in my workshop or on the golf course!)

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