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Oil Pressuer - Relief Valve Issues

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T

twas_brillig

Jedi Knight
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There's been some discussion in the past regards reasons for low engine oil pressure, and one is a poor seal between the oil pressure relief plunger and the block (due to a weak spring or the metal to metal seal), allowing oil to bleed past the metal cup and back into the sump before doing its job.
Here's a note from www.spridget.com page 8 of their catalogue (both the big Healey and the wee one use the same design):
"Oil Pressure Relief – Note: Cup should be lapped in block, also grind spring as to stand vertical when placed on a table."
The lapping had occurred to me (as something to do during an engine rebuild) when I replaced the spring and cup and effectively resolved our low oil pressure problems, but the 'grind spring' is a new one to me.
Doug
 
The 'grind spring' is a new one to me.
:iagree:
But they are probably just making sure you buy a new spring

---Keoke--- :laugh:
 
Keoke said:
The 'grind spring' is a new one to me.
:iagree:
But they are probably just making sure you buy a new spring

---Keoke--- :laugh:
Click to expand...
if you stand most springs up on a flat surface youll see it leans slightly, by grinding down its high side it gives a straighter more linear/even push so the cup/prv will not get cocked inside its chamber walls.
 
anthony7777 said:
Keoke said:
The 'grind spring' is a new one to me.
:iagree:
But they are probably just making sure you buy a new spring

---Keoke--- :laugh:
Click to expand...
if you stand most springs up on a flat surface youll see it leans slightly, by grinding down its high side it gives a straighter more linear/even push so the cup/prv will not get cocked inside its chamber walls.
Click to expand...
Not the first time I've heard about grinding down the spring! Makes sense to apply equal pressure to the relief valve which makes sense when you think of lapping in the intake and exhaust valves. Every little bit helps.
Patrick
 
Not the first time I've heard about grinding down the spring! Makes sense to apply equal pressure to the relief valve which makes sense when you think of lapping in the intake and exhaust valves. Every little bit helps.

Yep :iagree: and a new spring sure would make a marked improvement--Keoke-- :wink:
Patrick
 
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