Finally the cobbler's..

[sarran1955]

shoes get mended.....

Hello,

I've kept meaning to overhaul my engine.. but what with the Summer traffic of broken vans..and 1001 other things..

My little CT engine, cobbled together 7 years ago, thrashed around Europe, ski ing.. seaside..moped festivals..etc..

lost power on the motorway coming home, and started smoking like a wounded spitfire.....

So:..

Under the hanger in the shade:



1 man (60), 1 tractor (63), eight bolts, and fifty minutes later....




and so up into the 'new' workshop




With the tinware coming off we find a blowing exhaust clamp:




and of course nearly every 6mm bolt on the front end shears..


So, flywheel off,..



No leak from the crankcase oil seal:




But there is a 'weep' from the underside of the oil cooler:




and so onto the cylinder heads.. this one seems OK, with all the valve springs at the same height, and all the adjustment screws the same:



but on the other side..




Why is one spring higher than the others...

Here's why:





The valve seat has collapsed... at least it was into the head..and not dropped into the combustion chamber..

So, in typical cobblers fashion, I'll use my big box of bits to make good...

and shiny with new laces..

Keep watching Aircooled fans..

Cordialement,

[CovKid]

I don't think anyone can see the pics except you. Just thought I'd mention it.

[Oldiebut goodie]

Last image is somewhere in here. but I can't see it either.

http*://lh3.googleusercontent.com/5ofD8zib33zCBgR5msd_d5Uni4iIRhG2dVpKNc2BEC1AWuwMDAkJUk5rqn1jZNUedF2QdkWRCC9Uc823BSq9fLGgcrgWYA7c-oG_sbxqgRdEqYv5ZENwLw76Hp_r6e5szkGrm4F5i1KKc1R7WjrIrNRA8knaXdyWfD7hW0-JLdnV_Q5wi8ykiuBuO2ygEnoAKDPbHLEevN1lZ04L0pZA1x6FJZ-E7lhPmcgLpGwP1dIp52hdIRiRMDXmMT_ho8EDZlsgbV95lNDg_vlqBqEbnlgLQ_S33elta3KVPYf2vErzcGh-vUDrvipw2KEzuV8CuL-M5oqij_zxwzbjstE1Jh-UJrt5-LzhxsBA5l5FGr0T_SmqlY4Ohclm53Ys7MFXtziM9neXC9TUYK3OO6DI72RsVnC6SVhFB8ZdooEB91tOVnpz0lX5hbI8sBtnoLzetsi6fVYqe374nS3PxsrAT1kOrjvS4LlcWpCDrqeUdP0JrSBqfdz82OwC2L6xlNPeFmbS4xmjGU7hqufDBvIrCE8oHagOQI7WZSoxDEGm8ISkrXgrMs7a4NovcO53e0RvZEQQd14w8_pX7K093DR7diseLBXCIqI1zz97kwrD2qW9t0mn=w1194-h895-no

[sarran1955]

Hello,

Can you confirm that the pics can be seen now, I see them ok on line. ..

I'm using Google photos..

Put in a picture:



of my Canadian Grey apple tree

Upload, click on chosen picture.. it fills the screen, .. copy link, goes to right size on draft.

How do I check that the 'image size has been determined.'...

Cordialement,

[george2490]

I see it

[sarran1955]

Hello,

But not the first part..

Ho Hum..

Cordialement..

[Oldiebut goodie]

That is better:

http*://lh3.googleusercontent.com/ms7xXTuF_qH_JcY81tvfSWaa5HAY1fWgv1pky-HaQ9Bb8lTpL_dM0Z_scllO1KZj1kKFqdcRyom0c2A5rm7O5R3bS5k_hQi2_Gd8iX1DwtYOjCgLC6PlJr6YAUIg3ZyvttnqtOmriuEenFXezqaJAuLORHeJNnUAvSDb6bHk47EuCNl2i0iEgBqzwXmaoKEVffKZsojupPbnoVuK3Y2wJ1REHDAL5Otavh5fkVKmC-OC8BsX6qaDNKOlt3sucR8GAFrLve5EsZX4QY0Fq99A-_WFmGbRBJO4rU3jceTRQhkA2AFBpLP9r0pY7lVh0ULtoMSC7zAzfex-8CACcf4a6QZc31f025OHzqneYNVhjyhMSqhl1y-6YsoGAtXT8n0N5cjZssKXeAQrdbsOhTv5G45g74MQ4pAGd4Eb81crCF2nt61tcwI1EplY9VV0dFBNZ_R_5t7jWcM-yJxXpKaDQUN5FqcmlM3HfauU3U55RsDhhv1noibVEvdyF4iCax6wjW964Ymjo2SScqZV0rk3n34iCKZ_vJXYszZ6THmpWWDAjF9QgpGjmxtwDG63TwU-ThCa05eAXrFaELHCIcHdn_2Sg6DiL4IzA6fActjkdYBFJj_8=w672-h895-no

It is also showing that it is a jpeg image and the dimensions of 671 x 895 (scaled to 600 x800) - non of that information was showing with the other image placeholders.
The others do not show that it is an image for some reason - it thinks it is just text/html according to the image properties.

My pears are ripening nicely in the warm weather that you are sending us!

[sarran1955]

Hello

That is better:

It is also showing that it is a jpeg image and the dimensions of 671 x 895 (scaled to 600 x800) - non of that information was showing with the other image placeholders.

My pears are ripening nicely in the warm weather that you are sending us!

I will have to put up some photos of my grapevines on walls, on the front of my house there will be 10 kg black sweet grapes (with big pips), and up to 30 kg of a very late ripening white grape that was used to bulk out and sweeten the cidre from the neighbours trees.

Now back to the cobblers shoes..

Cordialement,

[sarran1955]

shoes get mended.....

Hello,

I've kept meaning to overhaul my engine.. but what with the Summer traffic of broken vans..and 1001 other things..

My little CT engine, cobbled together 7 years ago, thrashed around Europe, ski ing.. seaside..moped festivals..etc..

lost power on the motorway coming home, and started smoking like a wounded spitfire.....

So:..

Under the hanger in the shade:



1 man (60), 1 tractor (63), eight bolts, and fifty minutes later....



OK... so are the images working please..

Cordialement,

[mrhutch]

keep updates coming

[Oldiebut goodie]

100% A1
No problems with these ones.

[discipleofsketch]

A familiar spot! Yes I can see the images now

[sarran1955]

and so up into the 'new' workshop




With the tinware coming off we find a blowing exhaust clamp:



and of course nearly every 6mm bolt on the front end shears..



So, flywheel off,..




No leak from the crankcase oil seal:




But there is a 'weep' from the underside of the oil cooler:




and so onto the cylinder heads.. this one seems OK, with all the valve springs at the same height, and all the adjustment screws the same:



but on the other side..




Why is one spring higher than the others...

Here's why:




The valve seat has collapsed... at least it was into the head..and not dropped into the combustion chamber..

So, in typical cobblers fashion, I'll use my big box of bits to make good...

and shiny with new laces..

Keep watching Aircooled fans..

Cordialement,



Hope this works......

[sarran1955]

Hello,

Rain at last here, the temperature in the shade was 28 C at 7.30 pm yesterday....

today its :15..

So, I've been looking in my NOS stock boxes,

and my reclaimable cylinder head collection..

The engine was built up using known good Mahler forged T1 pistons and barrels

with CT heads...

HERESY WARNING...

There is nothing special about using beetle pistons/barrels/heads..apart from changing to W7AC plugs..

The CT druids will tell you that you can only use the proper..(elusive and expensive) 20 fin cylinders..as opposed to the 'common or garden'

19 fin Chinese AAA performance parts....for T1 and 2...at 209€ the set..

The net result of this terrible thing is:



it lets you hold the cylinder stud firmly when releasing the head....remember CT's are all 8mm studs, helicoiled into the block..

The only physical difference is that the CT head is deeper, with one fin extra on the cylinder side.. to allow low compression and make the heads more 'burst proof'. around the spark plug , the top dimensions remain unchanged.

So.. I'm going to fit T1 /2 heads..

All those scared of being burnt at the stake can open their eyes now..



First.. deal with the broken stud..

This is another favourite 'old wives' tale'.... ho ho..yes.. you just weld a nut on.. and hey presto it unwinds..

Given that I do weldy stuff for a living..



we wind on a 15x8 unplated nut on..

preheat till cherry red..



and weld at high intensity:



allowing time to cool.. we try the gentle spanner....

and the stud shears off... like always..(unless you can prove otherwise)..

So.. back to old school..

Fix the cylinder head in a good working position..with an 80 grit flapwheel sand down the remains of the stud.. removing any gasket remains and corrosion..Protect your eyes and wear a mask, as aluminium oxide and lungs do not go well together..

then dot punch slightly offset of centre:



Then drill carefully, using a new bit please, 4 mm, then 6mm,

If you get it right, you will have cut into the thread of the bolt, and with a magnetic pointy thing you can winkle out the rest of the thread..



Then tap at M8..ready for your new stud....USE THREAD LOCKING COMPOUND.

On the subject of studs..

I am fortunate as at work I have access to a complete stock of industrial fasteners.

When I have to make a stud, I use Wurth brand 10.1 BZP bolts. cut down and prepared thus:



This is going to be a crankcase stud..

Which when chamfered and the required depth set with 2 locknuts..



The case is prepared:



and here is the result:



Well I hope that was as good for you as it was for me..

Sorry to seem SkillCentre ish..but I am breaking in a new apprentice.. and we are still at the 'I don't need to listen..'cos I know it all' stage..

Supper time..

Bon appetit,

Cordialement,

[george2490]

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