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Dec 26, 2021 20:53:52 GMT
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So, abit of backstory. I'm a 16 year old doing my GCSEs. I'm in the middle of rebuilding a 2cv race car, mucking about with a base model Citroen AX whilst I should be revising. I've now been asked to rebuild and upgrade a 1959 425cc 2cv engine. The plan is to put the all new, Burton 2cv parts 530cc pistons and barrels on it and just a general clean up. This thread is going to be about the rebuild of the engine. So we rocked up to Bicester Heritage in the work van   So we went inside the building on the hunt for the engine.   After a phone call, we finally went into the right building and found it sat next to the engineless 2cv and a Saab 900 Turbo.  Yours truely on the phone. www.flickr.com/photos/194633581@N06/51776062857/in/photostream/And there it is.  After bringing the work van over, it was loaded up being carfull not to punch a hole through the boot floor.  And bungee straped down to make sure it didnt come flying through the windscreen when we brake.  On the way home with the engine rollin round in the back.  Finally home having broken out the muscles to get it up on the bench |
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Dec 26, 2021 22:09:27 GMT
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I am liking this story all ready!! I am in for sure!
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Dec 28, 2021 20:45:19 GMT
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With all the excitment of getting the engine home, I began to strip it down that afternoon  taking the 3 stud manifold off  These cowlings have seen better days  Especaily this one  Then I started getting abit carried away taking the rocker cover off getting all giddy about taking the pistons and barrels off. I had to tell myself to calm down and that there is other bits and peices that need to come off first.  The oil cooler was off next with the worlds biggest banjo bolts. Its much better than the 602cc oil cooler which is plumbed into the block with the olives that have a habit of snapping and leaving the remains of the aliuminium tube in the block.  The flywheel and clutch off.  oh dear, a bit of an oil leak from the crankseal |
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glenanderson
Club Retro Rides Member
Posts: 4,117
Club RR Member Number: 64
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Dec 28, 2021 22:13:24 GMT
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My neighbour has a 424cc 2CV. lovely thing.
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My worst worry about dying is my wife selling my stuff for what I told her it cost...
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Heads, pistons and barrels off next.  The barrel didn't want to come off the head so it came off with the head.  Leaving the the pistons on the cylinder studs.   And the second one off in the same manner.  The gudgen pin came out with every little resistance apart from the clips that stop the pin sliding around and scraping the cyclinder. They are some lethal spring clips that when they come out they shoot across the shed never to be seen again.  A size comparison between the 425cc piston and the later 602cc piston.  Now stripping the heads down.  The heads are very diffrent to the 602 heads. The rocker arm sharft is in two eyes and needs to be bashed out with a large punch and a hammer to knock them out with. Then the rocker arm and all the springs and washers are free.   These cyclinder heads are quite weired. One head doesnt have valve seals, which is what the engine would have had from the time, but the other has vavlve seals. It might have leeked at some point and then modified to fit the vavle seals. |
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Davey
Posted a lot
Resident Tyre Nerd.
Posts: 2,229
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Great to see you getting into this now!
Fair warning, its a slippery slope to having absolutely no money and no social life! Enjoy, I know we all do!
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K11 Micra x3 - Mk3 astra - Seat Marbella - Mk6 Escort estate - B5 Passat - Alfa 156 estate - E36 compact
Mk2 MR2 T-bar - E46 328i - Skoda Superb - Fiat seicento - 6n2 Polo - 6n polo 1.6 - Mk1 GS300
EU8 civic type S - MG ZT cdti - R56 MINI Cooper S - Audi A3 8p - Jaguar XF (X250) - FN2 Civic Type R - Mk2 2.0i Ford Focus
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Jan 23, 2022 21:56:49 GMT
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 Next was to give the cylinder heads a proper clean, I'd been giving them a clean for several days with engine degreaser, but this was taking ages. The mother had gone out, and the opurtunity was there to put the heads into the dishwasher. But the next day, of all the days, the mother decied to clean the filter in the dishwasher; which had aload of oil in it. Got quite the telling off for that.  Next job was lapping the vavles in, this one was very heavily pitted.  And this one had leaked heavily.  and finaly lapping the in the vavles.  next job is to split the block.  and after a lot of fighting from not undoing a bolt I hadn't found, the crank case is apart.  This is the sludge that is not uncommon for these 425cc engines due to no replacable oil filter and what is baisicaly chicken wire for an oil filter. This is why these engines suffer from wear.  This is what citroen thought counts as an oil filter  But it in good news, the new parts have arived.  with the new, all aluminium pistons and the brand new cast barrels. |
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totti
Posted a lot
Posts: 1,153
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Tach! Heads in the dishwasher....you are my hero!!!  Greet |
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Last Edit: Jan 24, 2022 6:08:40 GMT by totti
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Jan 24, 2022 12:27:06 GMT
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Tach! Heads in the dishwasher....you are my hero!!! Greet Not only that but with the plates and cutlery !!!  |
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Jan 24, 2022 12:55:47 GMT
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Great work!
I recognise that AX, tried to change the spark plugs yet? (I'm mates with the previous owner)
Loved that car, we went all over in it, such a fun little machine
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Jan 24, 2022 13:55:49 GMT
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Tach! Heads in the dishwasher....you are my hero!!!  Greet Not only that but with the plates and cutlery !!!  this made me lol. I still do this when the current wife is out. love this thread, you can just feel the enthusiasm of youth. fair play young man, fair play  |
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Great work! I recognise that AX, tried to change the spark plugs yet? (I'm mates with the previous owner) Loved that car, we went all over in it, such a fun little machine Yes I've changed the spark plugs, they had a few white deposits on them as the radiator fan switch and the thermostat pooped themselves when it was sat idling. This water cooled nonsense will never catch on. It's such a giggle to drive especially will all the body roll you get. |
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Davey
Posted a lot
Resident Tyre Nerd.
Posts: 2,229
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Jan 26, 2022 13:00:15 GMT
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Tach! Heads in the dishwasher....you are my hero!!! Greet Not only that but with the plates and cutlery !!! What a hero! I would either be put in the dishwasher or have the head thrown at my head! At least your mother can't divorce you! |
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K11 Micra x3 - Mk3 astra - Seat Marbella - Mk6 Escort estate - B5 Passat - Alfa 156 estate - E36 compact
Mk2 MR2 T-bar - E46 328i - Skoda Superb - Fiat seicento - 6n2 Polo - 6n polo 1.6 - Mk1 GS300
EU8 civic type S - MG ZT cdti - R56 MINI Cooper S - Audi A3 8p - Jaguar XF (X250) - FN2 Civic Type R - Mk2 2.0i Ford Focus
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The rebuild could now begin.  This a comarison between a later 602cc piston and the aluminuim 530cc piston that came in the kit. They have the same 74mm bore but as the 425cc engine has a smaller stroke it only brings it up to 530cc.  Next was to put the heads back togethter. I used a an off cut of a piece of pipe, which I had cut a window out of, and a big G clamp to compress the valve springs and get the collets on.  And the rockers back on.  The bottom end back together ready for the new pistons  Now measuring the piston ring gaps. If the gap is too small then it will score the cylinder, if it is to big then the combustion chamber will leak.  After fitting the gudgeon pin, and the clips that hold it in place, it was time to put the barrel on. And after alot of fighting trying to compress the piston rings, the barrel is on.  Next to fit the electronic ignition. The advance weights had to come off...  ...to allow for the magnets for the electronic ignition to pick up on. The electronic ingintion unit just bolts in the same place the points and condenser would nomally sit.  The head back on and ready to go to Bicester Heritage for the Bicester Scramble to go on display. The G clamp is there to stop the crank falling out.  On display at Bicester.   Even got some intrest from TV's Dominic Chinea. He did a vlog about the scramble and he shows the engine in his video. It's a really good video and I've put a link to it. You can the the 2cv engine at 8:16 There was lots of other good stuff at the scramble.        |
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