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Old 03-17-2017, 05:15 AM   #41
Lester
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Default Re: 1949 Ariel Square four

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Originally Posted by Goldy View Post
I was going to use Rotocast Bronze, but Draganfly had babbit lined replacement bushings available in 0.100" undersize. I had to machine them to 0.0010" under to fit the regrind.

I've used rotocast on several other jobs, in fact one came back to me recently that I had machined about 25 years ago. It wears well and is very easy to work with. Had I not been able to get the babbit lined ones, I wouldn't have thought twice about using the Bronze instead.
Thanks Goldy.... and i ment Bronze obviouly.....lol.
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Old 03-17-2017, 10:51 AM   #42
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Default Re: 1949 Ariel Square four

Ok Photobucket seems to be working now...

Here's the new bushings before machining with the an old one for comparison:



And here are the new bushings with the oil grooves machined and the bores done to fit the crankshafts:



Setting the thrust clearance:



Finally found that oil scavenge pipe! A look at the inside:



...and the reassembled crankshafts:

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Old 03-24-2017, 05:35 PM   #43
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Default Re: 1949 Ariel Square four

Completed a bit more engine work this week. Had to machine a little spacer to fit over the camshaft to locate the cam properly in the crankcase, then slipped that in. Got the coupling gears mounted to the crankshafts after fitting new vibration dampers...they really do work...the gears ring like a bell without those simple fibre discs. Connecting rods were installed and torqued. Took the cylinder block to the machine shop to have the old liners pressed out and new ones installed and bored to match the new pistons. Started working on the cylinder head, took a while but I managed to get the rocker arm shafts out without damaging anything (the rocker arms had seized to the shafts).

Crankcase with all the guts in place:

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Old 03-26-2017, 05:19 PM   #44
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Default Re: 1949 Ariel Square four

You seem to be slapping this together like you build them every week, with just a shop manual to refer to, and having never worked on this engine (which is unlike any other) before. I don't know how you do it!

It's looking great, I'm already looking forward to the day you fire this one up.
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Old 03-26-2017, 06:41 PM   #45
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Default Re: 1949 Ariel Square four

Well, to be honest, I'm really taking taking my time and studying everything very closely before any assembly takes place. I've been checking everything at least twice...and the shop manual..well I suppose it's better than nothing, but for all the information and instruction it leaves to the imagination, I might as well not even have it. It's damn near useless! I do have some other literature that helps fill in the blank spots though.
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Last edited by Goldy; 03-26-2017 at 07:26 PM.
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Old 04-02-2017, 06:39 PM   #46
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Default Re: 1949 Ariel Square four

Not much to report on this week...did get the valve guides knocked out and new ones installed. Machine shop still has the cylinders. There has been a death in the family and I'm going to be pretty busy getting the legalities looked after as well as clearing and cleaning her apartment this month, so things may slow down, but not stop altogether...shop time is my form of decompression. :P
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Old 04-02-2017, 07:22 PM   #47
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Default Re: 1949 Ariel Square four

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Might get arrested carrying all that crack


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Old 04-15-2017, 10:09 AM   #48
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Default Re: 1949 Ariel Square four

man this really makes me wants SQ4
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Old 04-15-2017, 01:08 PM   #49
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Default Re: 1949 Ariel Square four

Am always interested in progress on projects like this, keep it up!
Willy
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Old 04-16-2017, 09:03 AM   #50
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Default Re: 1949 Ariel Square four

Mike picked up the re-sleeved cylinders from the machine shop a few days ago and delivered them to me this morning. Needless to say, they did a nice job installing and boring them to match the pistons. I'll post a picture or two later. Happy Easter!
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Old Yesterday, 02:08 PM   #51
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Default Re: 1949 Ariel Square four

It's been a busy month and not the sort of "busy" I like. I believe I mentioned before, I had to empty a deceased relative's apartment (all alone...at least I had the "boss" to help me with the final clean up). On top of that, I had to help two of my boys move. I don't know how I even had time to take a friggin' dump this month...but at least that's behind me. So... here are the pics of those cylinders I promised in the last posting. Currently on the hunt for a couple of exhaust valves....have all but two in that pile of bits and pieces....but there's nothing really holding me back from fitting the pistons and cylinders next week...I hope!



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