7 replies to this topic

[salient]

Some years ago my clever brother added an extra oil filter to protect the oil pump on his Mini racer. As you can see in the enclosed photo he brazed a 15mm copper pipe to the suction plate on the back of the gearbox. This is connected to a remote filter not shown. The output from this filter passes into the back of the block on its way to the oil pump. As you all know there is a lot of gearbox debris that gets sucked up and wears away the oil pump. I have used this system on my S engine for several years and the oil pressure has always been very high. I am currently switching the rod change gearbox to a remote one in order to fit into my 1970 Clubman so I thought I would share this detail with you whilst the unit was out of the car.

Edited by salient, 13 April 2022 - 02:32 PM.

[Quinlan minor]

 "As you can see in the enclosed photo" ?

Edited by Quinlan minor, 13 April 2022 - 03:02 PM.

[PoolGuy]

 I have used this system on my S engine for several years and the oil pressure has always been very high.

Check the pressure relief valve.

[nicklouse]

Some years ago my clever brother added an extra oil filter to protect the oil pump on his Mini racer. As you can see in the enclosed photo he brazed a 15mm copper pipe to the suction plate on the back of the gearbox. This is connected to a remote filter not shown. The output from this filter passes into the back of the block on its way to the oil pump. As you all know there is a lot of gearbox debris that gets sucked up and wears away the oil pump. I have used this system on my S engine for several years and the oil pressure has always been very high. I am currently switching the rod change gearbox to a remote one in order to fit into my 1970 Clubman so I thought I would share this detail with you whilst the unit was out of the car.

Been there done it. Removed it. Need to find a better way of implementing it than I did in 95.

[Spider]

Putting filters on the suction side of any pump is not straight forward and has mixed results.

 

Nearly all Oil Filters are designed to work under pressure above atmospheric. Using the under a negative pressure (suction) usually they'll just by-pass doing nothing more than holding a bit extra oil in the system

[mab01uk]

Minispares sell these magnetic oil traps below similar to the magnetic sump plug but if fitted and then neglected/forgotten/not cleaned regularly the build up of trapped metal debris can cause more problems....

 

MAGNETIC OIL TRAP FOR GEARBOX

"Fits in place of the oil pick up retainer plate on the back of the gearbox this magnetic plug filter collects metal debris from going back into the power unit but should be regularly cleaned. Also available as the ultimate is the same item with a built in filter gauze."

https://www.minispar...rap-for-gearbox

 

MAGNETIC OIL TRAP WITH FILTER

"Fits in place of the oil pick up retainer plate on the back of the gearbox this magnetic plug with filter collects metal debris from going back into the power unit but should be regularly cleaned. A non filter type of theis version is also available."

https://www.minispar...rap-with-filter

 

IN LINE OIL PICK UP MAGNETIC TRAP WITH FILTER – Fitting Instructions:-

https://www.minispar...og/pdf/HPS5.pdf

 

Quote: "It’s position in the oil supply gallery necessitates frequent removal of the trap to clean collected particles out, more so for the filtered version. Failure to do this will cause premature failure of the pump and possibly engine bearings. There are no hard and fast rules for this periodic maintenance as vehicle usage will determine debris build up. Obviously a carefully driven road car will not need as frequent attention as a race car. Certainly clean it at every oil change. This frequent servicing can be of benefit as excessive amounts of debris could indicate a deteriorating gearbox."

 

Edited by mab01uk, Today, 09:39 AM.

[MatthewsDad]

Just curious but doesn't a magnetic sump plug do the same job as the above gearbox/ pump traps?

[imack]

The magnetic sump plug will capture some particles, but it's never going to catch everything. An additional one in the suction side of the pump stands a chance to capture a bit more before it goes through the pump.
They need removing and cleaning at every oil change though, and that can be tricky depending on your exhaust system.
I've got the magnetic trap (no filter) with a modified "gold" plug fitted, but it's impossible to remove with a long 3 into 1 manifold fitted. I have to remove the drive shaft and remove the plug via the driveshaft hole in the subframe.