BestyA Posted May 8, 2022 Report Share Posted May 8, 2022 So I have the dreaded oil feed modification fitted by a PO, starving the bottom end and flooding the top end. Feed is teed off the oil pressure switch, so that is easy to remove. Question is how do I plug off the top end? Link to comment Share on other sites More sharing options...
Iain T Posted May 8, 2022 Report Share Posted May 8, 2022 It's a set screw and copper washer. Take a look at the Canley Classics website which gives size. Iain Link to comment Share on other sites More sharing options...
thescrapman Posted May 8, 2022 Report Share Posted May 8, 2022 Just make sure the internal,oilway has not been blocked off, occasionally a proper job was actually done Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 9, 2022 Report Share Posted May 9, 2022 5/16/x24 unf setcrew quite short one and copper washer or some sealant Pete Link to comment Share on other sites More sharing options...
Mjit Posted May 10, 2022 Report Share Posted May 10, 2022 That's a SH605031 with a 500469 in parts book terms. Also worth getting a 5/16" crush washer off eBay - in case it turns out yours HAS been done properly and so you need to refit the external feed. From memory the advice on testing it I recieved on here when I bouth a 2500S with an external feed fitted was: 1. Remove from head/fit blanking screw+washer. 2. Remove oil pressure switch from 'T' piece/remove 'T' piece from block/refit oil pressure switch direct to block. 3. Remove rocker cover and wipe up any sitting oil. 4. Start and run the engine for 30s-60s. If the external feed was just bolted on you should start to see oil weaping out of the rocker shaft, as it's still getting supplied via the internal oilway, so you're good to switch off/refit the rocker cover/get on with your day. On the other hand if things stay bone dry at the top of the engine the external feed was fitted properly and the internal oilway blocked off and you're now running without rocker lubrication! Switch off and swap everything back to 'T' piece and external oil feed+oil pressure switch at the block end/external oil feed+crush washer at the top - and then get on with your day. Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 10, 2022 Report Share Posted May 10, 2022 to add the oil feed comes from the rear camshaft journal this has a small flat machined on the journal so you get a small squirt for each revolution of the cam this gives the rockers a interupted feed so it will appear up the rear pedestal in a series of squirts /pulses another option is to drill and tap the banjo bolt and fit aa threaded plug( bit of a bolt ) drilled with a 0.5mm bleed hole to really restrict the full flow Pete Link to comment Share on other sites More sharing options...
Iain T Posted May 10, 2022 Report Share Posted May 10, 2022 Or fit a needle valve as I have. Gives total control over the rocker oil feed. Iain Link to comment Share on other sites More sharing options...
JohnD Posted May 10, 2022 Report Share Posted May 10, 2022 Yeah, Brothers and Sisters, Alleliuahya! For Truthe is now the New Black, and Ye Spawne of Ye Deville is to be caste into Outer Darknesse! For even a new brother, Brother BestyA, knoweth that the external oil supply is a Sinne, and an Abomination! But I have to say that, A/ just blocking the usual feed from the rear camshaft bearing isn't a 'proper job', unless there is also a restrictor in the line. Where did your needle valve come from Iain, and how do you adjust it? Link to comment Share on other sites More sharing options...
Iain T Posted May 10, 2022 Report Share Posted May 10, 2022 1 hour ago, JohnD said: Where did your needle valve come from Iain, and how do you adjust it? One of these, has a T handle to adjust. From memory I only have it on half a turn. Link to comment Share on other sites More sharing options...
JohnD Posted May 10, 2022 Report Share Posted May 10, 2022 Thanks, Iain! What criteria did you use to adjust it? A method is to note the oil pressure before fitting the external line, then adjust until that pressure is the same with the line. John Link to comment Share on other sites More sharing options...
Iain T Posted May 10, 2022 Report Share Posted May 10, 2022 Your welcome. I forget where I bought the extra braided hose and s/steel fittings but chose again a commercial not car spare supplier to hopefully ensure better quality. To adjust I ran the engine up to temperature and adjusted until I obtained a constant slow drip. Opening the tap really increased the drip to a constant flow and turning off reduced to nothing. The oil pressure is now 80+psi cold and 60+ at 3000rpm Iain Link to comment Share on other sites More sharing options...
JohnD Posted May 10, 2022 Report Share Posted May 10, 2022 Sounds like a a proper job! John Link to comment Share on other sites More sharing options...
Iain T Posted May 10, 2022 Report Share Posted May 10, 2022 As a trial and before I bought the extra fittings I screwed it into a two port boss. The other outlet being oil pressure. It worked so I purchased the fittings and mounted the needle valve in a bracket on the side valance. No leaks......so far🤞 Iain Link to comment Share on other sites More sharing options...
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