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 Post subject: Re: Oil Leak. Help!
PostPosted: Wed Jan 29, 2020 3:48 pm 
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1275cc
1275cc

Joined: Wed Jan 19, 2005 1:52 pm
Posts: 2424
Location: Brisbane
not in my case

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 Post subject: Re: Oil Leak. Help!
PostPosted: Wed Jan 29, 2020 11:19 pm 
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SooperDooperMiniCooper ExpertEngineering
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Joined: Fri Apr 29, 2005 9:46 am
Posts: 18740
Location: Under the bonnet son!
Pretty odd it would find its way to the back of the starter motor after all that. Quite a journey! The oil looks emulsified too, there's water in that oil, probably from engine washing.

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All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.


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 Post subject: Re: Oil Leak. Help!
PostPosted: Tue Feb 04, 2020 12:43 am 
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848cc
848cc

Joined: Sun Oct 24, 2004 12:38 am
Posts: 139
Location: Booragoon, Perth
Hi everyone just a quick update. The engine is running at close to 100psi oil pressure constantly including at idle. I have been recommended an adjustable oil pressure valve to bring it down to 70psi. I am in the process of sourcing one so I'll let you know how this goes once I get it installed.


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 Post subject: Re: Oil Leak. Help!
PostPosted: Tue Feb 04, 2020 1:38 am 
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1275cc
1275cc
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Joined: Fri May 02, 2008 3:07 pm
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Location: The Internet
Thanks for the update.


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 Post subject: Re: Oil Leak. Help!
PostPosted: Tue Feb 04, 2020 1:34 pm 
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848cc
848cc

Joined: Sun Mar 16, 2014 11:01 am
Posts: 430
Location: TOWNSVILLE NQ
BeanMe wrote:
Hi everyone just a quick update. The engine is running at close to 100psi oil pressure constantly including at idle. I have been recommended an adjustable oil pressure valve to bring it down to 70psi. I am in the process of sourcing one so I'll let you know how this goes once I get it installed.


Isn't 60 psi the spec.?


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 Post subject: Re: Oil Leak. Help!
PostPosted: Tue Feb 04, 2020 4:54 pm 
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998cc
998cc

Joined: Fri Apr 01, 2011 8:33 pm
Posts: 1033
BeanMe wrote:
Hi everyone just a quick update. The engine is running at close to 100psi oil pressure constantly including at idle. I have been recommended an adjustable oil pressure valve to bring it down to 70psi. I am in the process of sourcing one so I'll let you know how this goes once I get it installed.


A small pile of washers is cheaper and less obvious.... I think I used gearbox drain plug washers... (they've been there a long time). Once you get the setup right there's no further need for adjustment so an adjustable setup is a bit of a waste.

Cheers, Ian


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 Post subject: Re: Oil Leak. Help!
PostPosted: Tue Feb 04, 2020 11:31 pm 
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848cc
848cc

Joined: Sun Oct 24, 2004 12:38 am
Posts: 139
Location: Booragoon, Perth
Good tip Ian. How many washers and did you have to adjust or cut back the spring?


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 Post subject: Re: Oil Leak. Help!
PostPosted: Wed Feb 05, 2020 4:20 am 
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religious status
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Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39151
Location: near Baulkham Hills, NSW
Cooper S spring is stronger than the standard one.
New S spring and plunger gives more pressure than the original 70 psi.
I would cut 2mm off it. Preferable to using a stack of fibre washers.

If using the original 60 psi non S spring, some 5mm steel washers can be put inside the cap.

Mine runs 90psi cold 75 hot, with a 13 row cooler.
Using Gulf Western 20W50.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank @7000+, 45 Dellorto, RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. Going harder with Peak ignition system fitted. :mrgreen:


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 Post subject: Re: Oil Leak. Help!
PostPosted: Mon Feb 10, 2020 11:43 pm 
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848cc
848cc

Joined: Sun Oct 24, 2004 12:38 am
Posts: 139
Location: Booragoon, Perth
Me again. Thanks to everyone for their advice. I have an adjustable oil pressure relief valve coming this Friday so I will let you all know how it goes.

Doc, is there a way to know what sort of spring I have?

I was also wondering what people recommend in running an engine in? I had a new cam (evo2 from Minispares) and followers put in so the mechanic suggested to run that in with the engine sitting at about 2500rpm for 15-20 minutes. It has hardly been run since it going back together due to the leak so I am keen to know what people recommend to run it in properly. After all the money I spent on it I don't want to see it busted for a long time yet! If you need any other info please let me know.


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 Post subject: Re: Oil Leak. Help!
PostPosted: Tue Feb 11, 2020 3:53 am 
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religious status
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Joined: Fri Mar 19, 2004 6:19 pm
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Location: near Baulkham Hills, NSW
Start it and drive it ASAP. Keep rpm below 3500 but make it work up some hills in 4th gear to bed the rings in.

Don't sit there at 2000 rpm in neutral with no load, it can glaze the rings. :(

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank @7000+, 45 Dellorto, RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. Going harder with Peak ignition system fitted. :mrgreen:


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 Post subject: Re: Oil Leak. Help!
PostPosted: Tue Feb 11, 2020 11:01 am 
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1275cc
1275cc

Joined: Wed Jan 19, 2005 1:52 pm
Posts: 2424
Location: Brisbane
I think that sitting at 2500 for 15-20 minutes is mad. You will glaze the bore as Doc has said. I tried it once and will never do it again.

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.


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 Post subject: Re: Oil Leak. Help!
PostPosted: Thu Feb 13, 2020 8:41 pm 
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1275cc
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Joined: Sat Jun 20, 2009 11:24 am
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Location: Wollongong
I remember whenever I helped my Dad refit a reconditioned motor he always made sure the car was ready to take straight out for a drive after the first startup as suggested.


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 Post subject: Re: Oil Leak. Help!
PostPosted: Sat Feb 15, 2020 2:55 pm 
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848cc
848cc

Joined: Sun Oct 24, 2004 12:38 am
Posts: 139
Location: Booragoon, Perth
Thought I'd provide an update. I changed over the relief valve with an adjustable one but could only get it down to 75psi. Is this still too high? It's still leaking from the starter motor holes and has a decent drip from the hole at the bottom where the pin is in the transfer housing. Unless I should cut the spring back a bit more and get the PSI down more I am starting to think the oil pressure is not the issue. I welcome any more ideas...


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 Post subject: Re: Oil Leak. Help!
PostPosted: Sat Feb 15, 2020 5:40 pm 
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religious status
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Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39151
Location: near Baulkham Hills, NSW
BeanMe wrote:
Thought I'd provide an update. I changed over the relief valve with an adjustable one but could only get it down to 75psi. Is this still too high? It's still leaking from the starter motor holes and has a decent drip from the hole at the bottom where the pin is in the transfer housing. Unless I should cut the spring back a bit more and get the PSI down more I am starting to think the oil pressure is not the issue. I welcome any more ideas...


75psi is fine. Cooper S had 70-75 hot.
If it had a normal spring it would be around 60.

I reckon you have the clutch oil seal leaking, again or still.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank @7000+, 45 Dellorto, RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. Going harder with Peak ignition system fitted. :mrgreen:


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 Post subject: Re: Oil Leak. Help!
PostPosted: Sat Feb 15, 2020 7:45 pm 
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998cc
998cc
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Joined: Sat Mar 24, 2012 1:39 pm
Posts: 535
Location: qld
Are you still using a break in oil? Maybe worth changing to a better oil? I recently had an oil leak as per Simon diagnosed, through the primary gear bush ( not seal) and it was in a similar fashion (hard to pick its source). A combination of better oil and better breathing may assist. Cheers Darryl


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