MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG MG Y Type - Oil pressure gauge supply line.

So today I put in a new 3mm id flexible pipe between the two copper tube ends (ie through the firewall), as an oil drip had developed from the 4mm id hose I fitted 12 months ago. The only pipe I could find that is oil resistant is fuel line from the mower shop - and here's the rub - it's translucent, so an unintended consequence is that I can see the oil travelling along the pipe - but stopping some way short of the back of the oil pressure gauge.
The gauge indicates 50+ psi on the run, so no problem there. Is it not necessary for the oil to reach the rear of the gauge? - is it the air pressure building up ahead of the oil that activates the gauge mechanism? As I keep saying, we never stop learning.
Any thoughts appreciated as always.
John.


J P Hall

Hi John.
Pressure is pressure is pressure, it makes no difference if it's oil, air, water or whatever, if you have 50psi at one end of the hose you'll have 50psi at the other end as well.
I've seen people bleed the gauge line to get all the air out by loosening the fitting on the gauge (messy job) thinking the pressure will register more quickly, maybe it does if you had a line full of air as it'd take a poof of a second to compress the air compared to a fluid,but really it makes no difference.
Actually it's 'possibly' easier on the gauge having an air bubble in the line to work like a shockabsorber for the gauge. I'd leave it as is.
willy
William Revit

I knew I could rely on you, Willy. Thank you - I'll leave well alone and be grateful that 'Er Indoors no longer gets an oily sock. Cold at night up here these days - just nudging 12 degrees.
John.
J P Hall

12deg, -we're lucky to get that in the middle of the day here, although ,the last week has warmed up a tiddle. There's a place called Liawenee about an hour and a bit back from me here that has recorded it's lowest ever overnight temp for July at minus -12.9c You wouldn't want your wet socks on there eh.

willy
William Revit

Ha! - that'll be that reverse-osmosis-cum-global-warming-effect thingo, Willy. Hang in there mate, the sun will reach Tassie eventually.
J P Hall

Ha ha --Would you have an approximate date i can work with please--lol
V8 Supercars down here this weekend
They'll be having a good old moan about the weather--- then they moan all the time anyway-spoilt gitts. Unbelievable how they can get paid to drive and yet moan all the time --
William Revit

This thread was discussed between 14/08/2024 and 16/08/2024

MG MG Y Type index

This thread is from the archives. Join the live MG MG Y Type BBS now