Jawa 350 / 632 engine rebuild (fitting the crankshaft)

LINK TO PART TWO http://youtu.be/cKCkJg0Kg10 Fitting the crankshaft assembly into crank cases on the Jawa 350 / 632 . Part one of three films Looking into the rebuild process of heating and freezing the crank and crank cases to enable the labrinth housing to be shrunk by freezing and the crank case heated so as to assemble the two together . Bearings used are KOYO JAPANESE crankshaft bearings with C3 clearence for normal running conditions http://www.loctite.co.uk/cps/rde/xchg/henkel_uke/hs.xsl/fullproduct-list-loct... Note
The start of this vid was made a few months ago but due to illness the vid was finnished jan 2012 .So it would have been a while ago when i last seen dennis to give him the jawa 350/638 engine and not as the vid would suggest . Cheer's all Terry

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[iroq22]

What do you use to freez the crankshaft ? i'm waiting to replay

[terence20001]

@iroq22

Hi , The only method i have is to use my domestic freezer while my wife's not looking :-)

But first i wrap the crank in plastic bag to try and seal it in whilst in freezer .

I've used this method for quite a few years with different Jawa's 634 / 638 e.t.c. and find that assembly is very easy this way .

All the best Terry

[miro263]

great work!

[terence20001]

@miro263

Hi Thank's

Appriciate your comment on the build .

All the best

Terry

[pitbull1952]

nice video terrence, its the first time ive seen this done on a jawa, the guide for the dowel pin is a good idea, good luck with it m8.  regards dennis

[terence20001]

Hi Dennis

Thank's glad you like the vid , in the past when i've fitted these cranks i've missed the dowl recess by a couple of mm , but once its in its in l.o.l. So i thought i'de make some sort of guide , and im pleased to say it worked great so hopfully they will all go in this well :from now on :-) Apart from top end the rest should be done in next couple of days ,

Hop all is well with you . All the best Terry

[terence20001]

@Radminster Hi Yes it is basicly a 634 but with 12 volt alternater and 638 engine mounts .

Like you say the iron cylinder does sound nice , i carnt wait to get it finnished .

i used to have a 634 oilmaster and the 638 i had was'nt the same some how :-)

I'll have a look at your photo's

All the best Terry

[Radminster]

Hi

that 632 ore actually 634 engine is with super better sound then 638 engine, I just put 638 engine in my jawa 634 only because the 12v system.

here is the picture before - img687.imageshack.us/img687/62­30/img7470i.jpg

after - img819.imageshack.us/img819/30­46/img7522x.jpg

[terence20001]

@ivaa7777JAWA Hi

Thank you for your positive comment , im pleased you like the vid .

Cheer's Terry

[terence20001]

@zip343 Hey Don Cheer's

Appriciate your comment on this vid as i found it quite awkward to film and do the job at the same tims so well pleased with that .

All the best Terry