oil pressure guage
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Peetee
- Minor Legend
- Posts: 3428
- Joined: Fri Nov 22, 2002 9:20 am
- Location: Southampton
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oil pressure guage
I was looking into fitting an oil pressure guage and had a look on e-bay for a suitable item. I didn't realise there was such a variety! Do I need electric/mechanical/(whatever) for a moggie. Also what fits on the engine block and how do I check if an e-bay item is suitable when the discription is limited?
Older and more confused than I could ever imagine possible.
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olonas
Oil pressure gauge
Others can probably add further but here goes.
If you fit a conventional (mechanical) gauge connected by a pipe you will need a suitable tee piece or connector depending on whether you are going to retain the low pressure warning light. This is what I have. The connection to the block is directly behind the distributor with one wire. This has to be removed and the tee piece fitted into the block. The existing pressure switch can then be screwed into the tee piece and reconnected. The pipe connector can then be screwed onto the tee piece. I found it better to install the gauge first and then run the pipe. If you wish to illuminate the gauge you'll need to find the sidelight or instrument illumination supply and tap into this.
I think the electric gauges need a 12v supply which runs through the gauge to a pressure transmitter which in turn screws int said tee piece.
The block connection and pressure warning light are 1/8" BSP but pipe connections/pressure transmitters could vary. No doubt a "period" gauge may have the correct thread. I think various adaptors and tee piece threads are available.
Hope this helps.
If you fit a conventional (mechanical) gauge connected by a pipe you will need a suitable tee piece or connector depending on whether you are going to retain the low pressure warning light. This is what I have. The connection to the block is directly behind the distributor with one wire. This has to be removed and the tee piece fitted into the block. The existing pressure switch can then be screwed into the tee piece and reconnected. The pipe connector can then be screwed onto the tee piece. I found it better to install the gauge first and then run the pipe. If you wish to illuminate the gauge you'll need to find the sidelight or instrument illumination supply and tap into this.
I think the electric gauges need a 12v supply which runs through the gauge to a pressure transmitter which in turn screws int said tee piece.
The block connection and pressure warning light are 1/8" BSP but pipe connections/pressure transmitters could vary. No doubt a "period" gauge may have the correct thread. I think various adaptors and tee piece threads are available.
Hope this helps.
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Willie
- Minor Legend
- Posts: 3204
- Joined: Tue Feb 12, 2002 12:00 am
- Location: S E London
- MMOC Member: No
oil pressure
Once you have fitted the gauge you will be able to tell how healthy
the engine is of course. The pressure should be 60lbs at anything
over 25mph in top gear and the tickover reading should be around
35-40 lbs on a really good engine. Below the spot where you fit
the T-piece is a large domed nut,this is the oil pressure control valve
and under it you will find a long spring. The length of this spring is
very important as it controls the overall oil pressure. It should be
2- 55/64" long (72.63mm) too long will increase the pressure above
the recommended maximum,too short will decrease the pressure.
I have successfully 'stretched ' a spring which was too short by
a large flat bladed screwdriver between the coils and twisting to
open them up slightly though you should,of course, buy a new spring.
They are readily available. It is NOT a good idea to increase the
oil pressure above the designed figure.
Willie
the engine is of course. The pressure should be 60lbs at anything
over 25mph in top gear and the tickover reading should be around
35-40 lbs on a really good engine. Below the spot where you fit
the T-piece is a large domed nut,this is the oil pressure control valve
and under it you will find a long spring. The length of this spring is
very important as it controls the overall oil pressure. It should be
2- 55/64" long (72.63mm) too long will increase the pressure above
the recommended maximum,too short will decrease the pressure.
I have successfully 'stretched ' a spring which was too short by
a large flat bladed screwdriver between the coils and twisting to
open them up slightly though you should,of course, buy a new spring.
They are readily available. It is NOT a good idea to increase the
oil pressure above the designed figure.
Willie