May 6, 2017 at 8:30 am #1107
I have a feeling that my oil pressure valve needs replacing due to no oil pressure reading on the gauge. So ive unbolted the nut and withdrew it along with the spring.In the manual it shows a plunger going into the block but nothings coming out even tried a magnet and nothings there.Is there meant to be a plunger and also how do i now if the spring needs replacing.May 6, 2017 at 1:47 pm #1109
To what vehicle/engine do you refer?May 6, 2017 at 2:44 pm #1111
If you are talking about the Somerset you are correct there should be a plunger as illustrated in the book although i have come across a ball bearing instead of the plunger on occasions.
When and How did you notice the lack of oil pressure? was the engine knocking, Is the gauge working?
It could be that the woodruff key in the pump its self has sheared but a more likley reason could be the Oil delivery pipe broken but you will need to get the sump off to check that.
Puzzled about the plunger.
In order to diagnose the fault assuming there is oil in the sump
If you crank over the engine (remove coil wire to prevent it starting) with the oil pressure spring and plug removed the oil should push the plunger out as the pressure builds up.
If no oil pressure builds up and flows out then the oil gallery is not being fed with oil. This would suggest that for some reason there is no oil being fed to the gallery and may be a fault of the pipe or pump it self.
Hope this is of some use to you
Paul ThompsonMay 6, 2017 at 3:51 pm #1113
ITS AN A40 DEVONMay 6, 2017 at 4:22 pm #1115
THE CAR IS AN A40 DEVON.
I NOTICED THE OIL GAUGE HARDLY MOVING AND A TERRIBLE KNOCKING/RATTLING NOISE FROM THE ENGINE WHEN UNDER LOAD NORMALLY BETWEEN 2ND AND 3RD GEAR.
ARE THE SOMERSET AND EVON ENGINES THE SAME THEN?May 7, 2017 at 10:19 am #1117
From what you describe i would suggest that the lack of oil pressure may be more likley due to excesive wear on the crank journals and bearings which unfortunately will require a more costly solution.
Depending on how often you use the vehicle you could try STP oil additive or a thicker oil but this is not realey a solution.
As the A stands for Austin and the 40 stands for 40 horse power i would suggest that they are the same engines but i cannot say for certain.
I believe the club has a few old engines in their barn.
I had the same issue with mine and had to rebuild the engine although mine is a 1959 Riley 1500 engine.
Hope this is of some use to you
Paul ThompsonFebruary 9, 2018 at 1:49 pm #1219southernscouseParticipant
sorry to jump in your post but note paul you have a 1500cc is this an easy upgrade and will it bolt up to a column change gearbox on a 54 devonFebruary 14, 2018 at 6:17 pm #1235
Sorry for the delay
This 1500 engine was already installed when I purchased it but I have removed and refitted to carry out a full overhaul of the engine.
I don’t know much about Devons but I thought they were floor change.
The rear sandwich plate had to have a few more holes drilled in it,
You will need a electric fuel pump as the 1500 does not have a mechanical pump facility, you will need to transfer timing marks onto the top of the timing chain cover as the 1500 timing marks are on the bottom which is obscured by the cross member.
Hope this is of use. Feel free to email me if you want any more info.
RegardsFebruary 17, 2018 at 12:19 pm #1241Eseries1955Participant
Hi there….yes the 1500 does go in but it’s about 1″ longer than the 1200. So you have to modify the front crossmember to miss the bolts on the front of the block…not too difficult. You fit the Devon front and rear backplates, and use the Devon flywheel, clutch Assy and starter motor. I can supply photos if you like. You need a welder.. Or a mate with one. I live in the Midlands… You can come and have a look if you want, or let me have your email. Regard Martin.February 22, 2018 at 9:48 pm #1245
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