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Engine rebuild and tuning
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Deuche Fester
Dropped


Joined: 17 Apr 2008
Posts: 102
Location: Hilversum, The Netherlands

PostPosted: Thu Jan 29, 2009 3:57 pm    Post subject: Reply with quote

JuanNavarro wrote:
If you still doesnt have dismanteled again your crankcase i dont think its necessary just to remove the seal, just extract the one you have and inspect and clean the bore and put a new one. Confused


Well, the seal was already a new one, and i don't have more. I could buy a new one of course... I will get some items this saturday, like the cilinders and pistons. Maybe i will get a new seal and just easily replace this one :)
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dyanut
Dropped


Joined: 05 Aug 2007
Posts: 177
Location: North Yorkshire

PostPosted: Fri Jan 30, 2009 4:31 pm    Post subject: Reply with quote

Dennis,
considering that it's so easy to replace the front crankshaft seal with the engine assembled, why not just leave it and see if it's OK after you've started the engine?

Out of curiosity, could I ask whether you've bought new cam followers to go with the reground cam? Apologies if you've already done this, but I did notice some cam followers sitting on the bench in your pictures...

With a Kent cam, it's also a good idea to use new valve springs and even then to check the spring rates.
The cam's opening and closing ramps are very steep and I suspect that this is connected with the problems experienced by UK racers with valve heads falling off. Sad
Some racers are already using stainless steel valves and I understand that more will be doing so for the 2009 season...

Ken.
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Deuche Fester
Dropped


Joined: 17 Apr 2008
Posts: 102
Location: Hilversum, The Netherlands

PostPosted: Fri Jan 30, 2009 9:02 pm    Post subject: Reply with quote

Hi Ken,

I am planning to thoroughly check the cam followers for wear and if needed to replace them. The valve springs i might replace, but how do i check the spring rates? I am going to pick up the barrels and pistons tomorrow morning and i can buy most parts there as well. If needed, i will take some new followers as well.
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JoZeF
Grave Digger


Joined: 25 May 2007
Posts: 1734

PostPosted: Fri Jan 30, 2009 9:25 pm    Post subject: Reply with quote

you always need new followers with a reground cam, I thought...
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Deuche Fester
Dropped


Joined: 17 Apr 2008
Posts: 102
Location: Hilversum, The Netherlands

PostPosted: Fri Jan 30, 2009 9:31 pm    Post subject: Reply with quote

Some people told me that the followers can also be reused if they don't show significant wear (pressing the surface of two of them against eachother you could see some wear)
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JoZeF
Grave Digger


Joined: 25 May 2007
Posts: 1734

PostPosted: Fri Jan 30, 2009 9:45 pm    Post subject: Reply with quote

hi

well, you can re use them if you have them ground flat, I think.

If i was fitting a new cam I'd rather have the parts in contact with it new, too
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Deuche Fester
Dropped


Joined: 17 Apr 2008
Posts: 102
Location: Hilversum, The Netherlands

PostPosted: Fri Jan 30, 2009 10:30 pm    Post subject: Reply with quote

JoZeF wrote:
hi

well, you can re use them if you have them ground flat, I think.

If i was fitting a new cam I'd rather have the parts in contact with it new, too


Now you're convincing me. Damn, there goes another 100 euro for 4 new followers :)
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Deuche Fester
Dropped


Joined: 17 Apr 2008
Posts: 102
Location: Hilversum, The Netherlands

PostPosted: Sat Jan 31, 2009 7:04 pm    Post subject: Reply with quote

Well, i got the barrels & pistons, some reground followers (!!!), 5 new bolts to mount the flywheel and a nice sleek 50's style new made rear bumper!

Tomorrow morning, i will start early and try to finish putting all back together! Expect otsl of pics then!
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dyanut
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Joined: 05 Aug 2007
Posts: 177
Location: North Yorkshire

PostPosted: Sat Jan 31, 2009 11:31 pm    Post subject: Reply with quote

Hi Dennis,
good luck with the rest of the work.
Don't forget the most important part of breaking in a new camshaft and followers, which is to keep the engine running _above_ 2000 rpm for about 20 minutes.
STP's site recommends even higher rpm for this process...
< http://www.citroentuning.de/doc/CAMSHAFT-1.pdf >

Ken.


Dennis wrote:
Well, i got the barrels & pistons, some reground followers (!!!), 5 new bolts to mount the flywheel and a nice sleek 50's style new made rear bumper!

Tomorrow morning, i will start early and try to finish putting all back together! Expect otsl of pics then!
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Deuche Fester
Dropped


Joined: 17 Apr 2008
Posts: 102
Location: Hilversum, The Netherlands

PostPosted: Sun Feb 01, 2009 11:13 am    Post subject: Reply with quote

dyanut wrote:
Hi Dennis,
good luck with the rest of the work.
Don't forget the most important part of breaking in a new camshaft and followers, which is to keep the engine running _above_ 2000 rpm for about 20 minutes.
STP's site recommends even higher rpm for this process...
< http://www.citroentuning.de/doc/CAMSHAFT-1.pdf >

Ken.


Thanks! I got the same info from the racers over at 2cvracing.co.uk and i will definately stick to this method!
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Deuche Fester
Dropped


Joined: 17 Apr 2008
Posts: 102
Location: Hilversum, The Netherlands

PostPosted: Sun Feb 01, 2009 9:37 pm    Post subject: Reply with quote


cam followers, my old ones on the left and new ones on the right. Although i could not detect any wear on the old ones, i mounted new grounded ones instead to be sure.


Cilinderheads in a bath of degreaser


Nothing beats blowing the rest of the dirt away with degreaser in the compressor :)


Sanding the valves with high grit sanding paper


Polishing the valve rims





New valve seals installed


Placing the valves with our homemade tool!



Beautiful new pistons with piston rings!

[img]`http://lh3.ggpht.com/_1N9nbPhdsMI/SYX1op37hNI/AAAAAAAAAkY/kzb08pnWerE/s640/010220091684.jpg[/img]
Installed the pistons. Looks amazing!


First cilinder in place


Aaaaah!


tightened the heads



How i left the workplace today.


You can find more (and bigger) pics here:
http://picasaweb.google.com/Thadeez/2cv#
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Deuche Fester
Dropped


Joined: 17 Apr 2008
Posts: 102
Location: Hilversum, The Netherlands

PostPosted: Wed Feb 04, 2009 1:05 pm    Post subject: Reply with quote


Björn resprayed the oil pipe and tube. Here it is installed with new seals.


Oilcooler (secondhand) installed with new rubbers.


New sparkplugs.


Brand new clutch set.


Don't forget to put this little sucker back :)


Setting the valve clearances, using the instructions in the Haynes manual.


Refitting the covers, after lubing the place up some more :)


All is fitted now. Even the fuelhose.



My brother has a problem with electrics in his deuche. Somehow when the engine is off, he has no more than 14V on his battery but when the car is running it goes up to over 17V! Recently he changed the voltage regulator and even made a new Ground for it. Did not work.... He was refitting a new Ground on the collector (dynamo). Hope it is well now.
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