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K750 ressurection

kmz k750 SV russian boxer side valve

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#16 luca.stere

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Posted 19 March 2017 - 11:16 PM

And begins to look like an engine:

Attached File  distributie-montata-k750.jpg   126.04K   8 downloads

#17 Mike Goldthorpe

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Posted 21 March 2017 - 10:36 PM

NIce!

#18 luca.stere

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Posted 22 March 2017 - 12:11 AM

View PostMike Goldthorpe, on 21 March 2017 - 10:36 PM, said:

NIce!

Rectified and mounted tappets:

Attached File  tacheti-rectificati-k750 1.jpg   80.92K   13 downloads

Attached File  tacheti-rectificati-k750 2.jpg   91.63K   14 downloads

Assembled tappets:

Attached File  tacheti-montati-k750 (2).jpg   223.92K   14 downloads

Attached File  tacheti-montati-k750 (1).jpg   212.05K   12 downloads

#19 Serious Black

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Posted 24 March 2017 - 11:12 AM

Any more details on the VW pistons? Which VW engines, which vehicle?
The devil is in the detail.

#20 luca.stere

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Posted 25 March 2017 - 01:20 AM

View PostSerious Black, on 24 March 2017 - 11:12 AM, said:

Any more details on the VW pistons? Which VW engines, which vehicle?

VW Golf Mk 1, 1588cc engine, 1978 - 1982 year. Compresion height of the piston is 41.8mm which is a little higher then the original (41mm) but you just have to put a thicker gasket under the cylinder and is just fine. Also you need 22mm bush for the piston pin, original is 21. The bore is 79.5mm, which is ideal fore using older cylinders. The play between piston and cylinder 0.06mm.

Part number for pistons: 049 107 065 A or F, Mahle 034 54 00.



Attached File  20151005_110957.jpg   77.46K   8 downloads

The pistons from the image above are made in Hungary (not OE, not Mahle) but they are good quality. If anyone is interested the price is 100 euro for a complete set (two pistons and german Goetze Rings).

#21 luca.stere

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Posted 30 March 2017 - 11:14 PM

This could be a very nice 375cc side valve one cylinder engine:

Attached File  rsz_20170305_125755.jpg   126.14K   15 downloads

#22 luca.stere

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Posted 08 April 2017 - 01:55 PM

So, the timing gears are mounted:

Posted Image

You can see because of the heating the gears has different colors, this because they have different materials.

#23 luca.stere

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Posted 08 April 2017 - 02:07 PM

For the cylinders I had two valves missing, so I have buyed two new valves for a DAF truck in order to be modified to K750 valves:

Posted Image

The original is on the left and the new modified one is in the right:

Posted Image

#24 luca.stere

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Posted 11 April 2017 - 01:22 PM

Bored cylinders at 80mm and rectified seat valves:

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Like I have said before this are BMW pistons which will be modified for this engine. You will see later.

#25 luca.stere

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Posted 11 April 2017 - 01:25 PM

This two valve springs are new ones, I had two of them missing:

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Assembling the valves:

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#26 luca.stere

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Posted 11 April 2017 - 01:41 PM

The rebored cylinders, modified BMW pistons for 41mm compression height and Goetze rings:

Posted Image

#27 luca.stere

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Posted 11 April 2017 - 02:01 PM

Gaskets for the engine:

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Piston with rings:

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Assembling the pistons on cylinders using dedicated tool:

Posted Image

For a better sealing I am using Curil (from Elring) on the cylinder gasket:

Posted Image

#28 luca.stere

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Posted 11 April 2017 - 02:02 PM

Assembled cylinders:

Posted Image


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#29 luca.stere

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Posted 12 April 2017 - 02:00 PM

The work on the flywheel, is the old model with the felt seal:

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Changing the old clutch pins it was not an easy task, only after I have heated well the flywheel I was able to extract them:

Posted Image

Old versus new:

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The new pins mounted:

Posted Image

#30 luca.stere

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Posted 13 April 2017 - 08:54 AM

I am using Loctite for the flywheel bolt:

Posted Image

Assembled flywheel:

Posted Image





Also tagged with one or more of these keywords: kmz, k750, SV, russian boxer, side valve

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