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Engine woes. ! !

Big Col
Posts: 402
Joined: Tue Feb 16, 2016 12:45 pm
Location: Leeds

Re: Engine woes. ! !

Post by Big Col » Tue Jun 25, 2019 10:26 pm

Al and John,
Forgive me for talking un-Daimler/Lanchester/BSA but I have recently bought an Austin Champ that stood for twelve years. Needless to say I have gone through a process of changing all things rubber. It is still pissing oil from the back crank seal which is a scroll type. I am going to adopt the catch it rather than cure it method until winter comes around and I can enjoy fixing. Now is the season to enjoy driving.
Colin,
I may be slow but I’m rough as well !

JT7196
Posts: 999
Joined: Sat Feb 13, 2016 7:22 am

Re: Engine woes. ! !

Post by JT7196 » Wed Jun 26, 2019 12:28 am

hi let us know how you get on, maybe even copy my design of Oil catcher ?? :lol: :lol: :lol: :lol:

Cheers Al :D :D

JT7196
Posts: 999
Joined: Sat Feb 13, 2016 7:22 am

Re: Engine woes. ! !

Post by JT7196 » Thu Jun 27, 2019 12:58 pm

Hi Chap, well found the answer thank goodness!! In my previous thread, I suggested that the Oil Restrictor that I had made May have been the cause of my dramatic Oil leak from the Rear Crankshaft Seal.
Well having removed the Restrictor from the oil feed to the Rocker Feed Union, there's practically no leak at all , save from the usual occasion drip which is probably quite "normal" so have refitted my "Oil Catcher" to keep Err indoors happy!
I do have slight leakage from some of the Nuts on the underside of the Gearbox, so have just purchased a quantity of Copper Washers hoping this relive the problem , I really wanted to fit Dowty Seals , but our local supplier did not carry them unfortunately.
So more good news , HS2 SU Carburettor arrive yesterday and it looks superb ! I have also finished making the SU Carb Adaptor , and is now in the hands of a friend of mine who will Silver Solder the joints, then it will go to my local "Plating" works to be Cadmium plated.

Cheers Al :D :D

User avatar
John-B
Site Admin
Posts: 1135
Joined: Tue Feb 09, 2016 9:10 pm
Location: Salisbury, UK
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Re: Engine woes. ! !

Post by John-B » Thu Jun 27, 2019 1:30 pm

Please explain whether the car is supposed to have a restrictor from the oil feed to the Rocker Feed Union? Did it increase the oil pressure too much? Is the oil pressure now adequate? Or was it a flow restrictor without reducing pressure?

Simon Hyslop
Posts: 246
Joined: Wed May 04, 2016 3:30 pm

Re: Engine woes. ! !

Post by Simon Hyslop » Thu Jun 27, 2019 2:09 pm

The oil feed to the rockers is fed off the oil gallery by an external feed pipe. On the 1203cc engine, prior to Al's 1444cc one, at the cylinder head end of the pipe there is an adjustable screw to regulate the flow to the rockers. Without taking the one on my 10 apart, I am pretty sure the adjustment is from 'full' to 'less full' as opposed to nil.
I've noted that on my LD10 there is no adjustment at all, it is purely a union which alliows a copious flow through.
Having read the general location of Al's leak, this pipe appeared to me the most likely source of trouble but I didn't know about his modification.
I suspect that the pipe's unions are not containing the reduced oil flow under increased pressure leading to the leak. The overall pressure in the oil system will not have been affected but the pressure building up in the pipe could be considerable.
I have taken the liberty of writing this reply because had I not had more than one car with this general arrangement, I would not have been aware of the detail differences they made over the years.

JT7196
Posts: 999
Joined: Sat Feb 13, 2016 7:22 am

Re: Engine woes. ! !

Post by JT7196 » Thu Jun 27, 2019 7:37 pm

Hi John & Simon, all the time I have owned my” Eleven” which is 41 yrs! The Banjo Bolt at the Cylinder Head has always had a short Screw inserted , and this is the first time I have removed it.
I was certain that I had seen such a Union with some sort of adjusting Screw in it , so like I said , because of what “Seemed” to be too much Oil up at the top of the Cylinder Head, I thought that I would attempt to reduce it , with the afore mentioned results.
In my own and Geoff Millington’s opinion’s , it did seem obvious that by restricting the flow, and by the way, I had no idea how much I had reduced the flow, this was the reason that the Rear Main was receiving too much Oil for the Scroll Seal to Handle , thus causing the substantial leak .
Now all is back to “Normal” now with just the occasional drip, as an aside, I do have a slight leak from Two of the Setscrews in the bottom of the Gearbox, I had fitted Dowty Sealing Washers under the Screw Heads, but the leaks have still persisted, so have now degreased the Threads and applied Loctite Thread lock , be interesting to see if this works .... 🤔🤔🤔🤔

Ps No knowledge of Oil pressure as no Gauge is fitted , only an Oil Warning Light

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