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by ralph thetford
Sun May 19, 2019 8:52 pm
Forum: Four stroke
Topic: 1938 Ariel square four crank main bearing end float
Replies: 1
Views: 274

1938 Ariel square four crank main bearing end float

I am just about to sort out the end float on both crankshafts --Could someone tell what the end float should ideally be.
by ralph thetford
Sat May 04, 2019 8:04 pm
Forum: Four stroke
Topic: 1938 SQUARE FOUR ENGINE PLATES
Replies: 2
Views: 322

Re: 1938 SQUARE FOUR ENGINE PLATES

Thanks again Paul----- Regards Ralph
by ralph thetford
Fri May 03, 2019 10:33 pm
Forum: Four stroke
Topic: 1938 SQUARE FOUR ENGINE PLATES
Replies: 2
Views: 322

1938 SQUARE FOUR ENGINE PLATES

Can someone help----Should there be washers under the nuts on the engine plate fixing bolts--if so should they be spring washers or flat washers.

Regards Ralph Thetford
by ralph thetford
Mon Apr 29, 2019 9:30 pm
Forum: Four stroke
Topic: 1938 ARIEL SQUARE FOUR SPEEDO FITTING
Replies: 2
Views: 298

Re: 1938 ARIEL SQUARE FOUR SPEEDO FITTING

Thank you once again Paul you have been a great help to me over the last year---Regards Ralph
by ralph thetford
Mon Apr 29, 2019 7:24 pm
Forum: Four stroke
Topic: 1938 ARIEL SQUARE FOUR SPEEDO FITTING
Replies: 2
Views: 298

1938 ARIEL SQUARE FOUR SPEEDO FITTING

Could someone please help with the following question ---- Should there be a rubber gasket between the speedo and the chrome panel, as looking under the speedo outer body flange is a small formed channel that looks like it is there to take a gasket.?

Regards Ralph
by ralph thetford
Fri Apr 12, 2019 7:34 pm
Forum: Four stroke
Topic: FITTING SQUARE FOUR ENGINE INTO FRAME
Replies: 3
Views: 485

FITTING SQUARE FOUR ENGINE INTO FRAME

What is the best approach to fitting the heavy engine into the frame without scratching the new paint. As a fully assembled engine is very heavy I have built it up as far as just block and crankcase with a view to assembling the rest (ie head, primary case, mag, etc.)when I get it fitted into frame....
by ralph thetford
Mon Mar 04, 2019 8:33 pm
Forum: Four stroke
Topic: 1938 Ariel square four crank main bearing end float
Replies: 2
Views: 355

1938 Ariel square four crank main bearing end float

I have just assembled newly ground crankshafts into the crankcase which has had fitted new main roller bearings and new main plain bearings, presently the end float is zero and I therefore need to fit shims, does anyone know what the correct end float on the cranks should be ?
Regards Ralph.
by ralph thetford
Sat Feb 16, 2019 8:38 pm
Forum: Four stroke
Topic: ENGINE OIL FOR 1938 ARIEL SQUARE FOUR
Replies: 8
Views: 720

Re: ENGINE OIL FOR 1938 ARIEL SQUARE FOUR

Dear Roger, Thanks for your reply, The engine has the standard original pump and I am fitting Dragonfly type oil filter.---Regards Ralph
by ralph thetford
Fri Feb 15, 2019 8:42 pm
Forum: Four stroke
Topic: ENGINE OIL FOR 1938 ARIEL SQUARE FOUR
Replies: 8
Views: 720

ENGINE OIL FOR 1938 ARIEL SQUARE FOUR

Hello, What is the latest thinking on the type of Engine oil I should use in my 1938 Square four, I have heard all sorts of stories about what to use ie--- Monograde, Monograde with additives, Multigrade, Etc--Etc.------ In both summer and winter or will one do for both--------What should I use??. R...
by ralph thetford
Thu Feb 07, 2019 9:42 pm
Forum: Four stroke
Topic: PLATING FINISHES ON SOME PARTS OF MY 1938 ARIEL SQUARE FOUR
Replies: 5
Views: 686

PLATING FINISHES ON SOME PARTS OF MY 1938 ARIEL SQUARE FOUR

What type of Plating finish should there be on (1)--The Strap that holds the magneto in position, (2)--- The small diameter oil feed pipes from the crank case to the rocker box and (3)---The rocker box lid special nuts---they all dirty and old look and like unpolished chrome but are they supposed to...

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