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Smokey the AMC Cub

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Smokey the AMC Cub

Post  Lemon-scamp-i on Fri Jun 24, 2016 11:39 pm

Here's 'smokey' the AMC Cub

Bought this recently needing minor restoration and urgent engine and mechanical work.

This car was the first Anderson cub to pass an IVA and the first of the new type built for the re launch in 2012.

This is the car in the press and order forms.
Then:








Lemon-scamp-i

Number of posts : 7
Location : East anglia
Job/hobbies : Electro mechanical tech
Registration date : 2014-04-18

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Re: Smokey the AMC Cub

Post  Lemon-scamp-i on Fri Jun 24, 2016 11:52 pm

Now:





So the engine..

It's a 1275 mg metro engine.. Or at least that's what's on the v5 etc.

The engine should have been reconditioned in 2012/13 to allow for the reg to be a brand new build. However the engine smoked badly so I thought it best to strip it and at least take a look to see if there was anything obvious before writing it off...



Head off and I can see straight away that oil is getting into the bores from the head as its laying on the crowns. The worst is cylinder 3.



Recent honing marks...



Doesn't look too bad in the bores. Some signs of pitting from where the car has been standing for so long and damp air/ moisture have entered bore 1 and 2. Should be ok though as the engine ran ok and no sign of ring breakages and bore scoring.

So I turn to the head..

It's a big valve mg metro item. It's a leaded head and the cars been running on modern unleaded without any additives...

The hotter unleaded has eroded the exhaust valve seats and the exhaust valves are caked in burnt oil residue.
The draw stroke has been sucking oil past the valve seats down the guides. No top hat seals were fitted?
That's why the car idles with little smoke but burns upon revving. I think?




Lemon-scamp-i

Number of posts : 7
Location : East anglia
Job/hobbies : Electro mechanical tech
Registration date : 2014-04-18

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Re: Smokey the AMC Cub

Post  Lemon-scamp-i on Sat Jun 25, 2016 12:02 am

Time for some repairs...



The re cut exhaust seat is the one on the right as shown below. I did do the inlets too as the tappets were so badly adjusted that these haven't been closing properly so have some pitting too... As shown on the left.
Forgot to take a picture of the inlets after cutting.









So I thought it a good time to clean the coke off the piston crowns...



WAIT what's this?



Seems that the standard 1275 engine has a +030 over bore. I'm guessing as this was the car people got to go for test drives in, MR Anderson wanted this to drive with a little extra oomph to make the Cub seem sportier. Little naughty.

And this is how far I've got



This may or may not cure the oil burning smoke. We will see.
I'm no engine expert by any means.

I have fitted all eight top hat seals with good quality items. All valves have been lapped in again the best I can without sending things to an engine shop.
The head and block were checked and are flat with no sign of gasket failure so seem good enough to go again without a re skim.

I have no idea what Cam is in this engine or what other hidden go faster bits are in it.. If any?

Will keep you up to date and let you know how it turns out.


Last edited by Lemon-scamp-i on Sat Jun 25, 2016 8:00 pm; edited 1 time in total

Lemon-scamp-i

Number of posts : 7
Location : East anglia
Job/hobbies : Electro mechanical tech
Registration date : 2014-04-18

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Re: Smokey the AMC Cub

Post  Lemon-scamp-i on Sat Jun 25, 2016 7:56 pm

I've no intention of keeping this engine and box as I'm going 16valve Nissan.

Would be good to see if it's got life left in it though.

Lemon-scamp-i

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Re: Smokey the AMC Cub

Post  Cub scampi on Mon Jun 27, 2016 12:39 pm

Put it all back together and it's still smoking.

Sounds a little "sloppy" in the Pistons. Going to sell as a rebuild project. Any interest on here?

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Re: Smokey the AMC Cub

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