Iain T Posted October 14, 2020 Report Share Posted October 14, 2020 I will be getting him to measure the end float and gear clearance. Once bitten...... Iain Link to comment Share on other sites More sharing options...
thescrapman Posted October 15, 2020 Report Share Posted October 15, 2020 I was told part of the problem is that all the parts are chucked in a big pile and they get dents etc on the rotors etc. I got my last 2 pumps from a fellow enthusiast who chooses parts and measures them all for best results. Adds a fair bit to the price, but still much less than any rebuild work on the engine. 1 Link to comment Share on other sites More sharing options...
Iain T Posted October 15, 2020 Report Share Posted October 15, 2020 The ones from Chris Witor at £50 + vat seem a good buy! Iain Link to comment Share on other sites More sharing options...
Nick Jones Posted October 15, 2020 Report Share Posted October 15, 2020 3 hours ago, Iain T said: The ones from Chris Witor at £50 + vat seem a good buy! Iain Best deal available I think. Nick Link to comment Share on other sites More sharing options...
Iain T Posted October 15, 2020 Report Share Posted October 15, 2020 The new oil pump has been deburred and the end float is 2 thou so I'm hopeful the pressure will be good and hold up when hot. Worry gauge arrived today. The engine should be in by Monday! Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 15, 2020 Report Share Posted October 15, 2020 why does it show 4psi ??? Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted October 15, 2020 Report Share Posted October 15, 2020 1 minute ago, Pete Lewis said: why does it show 4psi ??? Pete Air pressure. Or maybe altitude? Link to comment Share on other sites More sharing options...
SpitFire6 Posted October 15, 2020 Report Share Posted October 15, 2020 9 minutes ago, Colin Lindsay said: Air pressure. Or maybe altitude? It's not an absolute gauge so should read zero. Link to comment Share on other sites More sharing options...
Peter Truman Posted October 15, 2020 Report Share Posted October 15, 2020 Well it ain’t called a worry gauge for nowt! Link to comment Share on other sites More sharing options...
Iain T Posted October 15, 2020 Report Share Posted October 15, 2020 Good point! It says Smith's made in the UK suburb of China....... Bought from Competition Supplies, Silverstone. I'm going to need therapy😳😵 Link to comment Share on other sites More sharing options...
SpitFire6 Posted October 15, 2020 Report Share Posted October 15, 2020 It could be accurate and linear above 5 psi. <5 means the same? Link to comment Share on other sites More sharing options...
Iain T Posted October 15, 2020 Report Share Posted October 15, 2020 I'll phone Smiths and ask. The engine should be ready to go in by midday tomorrow. I'm going to the engine guy in the morning to take a peak. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted October 15, 2020 Report Share Posted October 15, 2020 2 hours ago, SpitFire6 said: It's not an absolute gauge so should read zero. I was joking... 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 15, 2020 Report Share Posted October 15, 2020 absolutely Ha 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 16, 2020 Report Share Posted October 16, 2020 from cia gauge https://www.smiths-instruments.co.uk/classic i dont see the numbers like yours shows but the top here is a bit dark these guys make all smiths gauges Link to comment Share on other sites More sharing options...
Colin Lindsay Posted October 16, 2020 Report Share Posted October 16, 2020 The code on Iain's gauge is the same as on the gauges fitted in Minis and Lotus, so common enough in UK cars and good for the job. Interestingly enough my Lucas gauge from the Herald also reads about 6 - 7 psi when off the vehicle; it's been off for some years now but the needle does not move about as the gauge is tilted. 1 Link to comment Share on other sites More sharing options...
Iain T Posted October 16, 2020 Report Share Posted October 16, 2020 The box says Caerbont which makes all Smiths instruments so I think it's the real deal from a reputable supplier. Haven't had a chance to phone them today but I will Monday. Iain Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 16, 2020 Report Share Posted October 16, 2020 on some there used to be a small screw in the rear to zero the bourdan tube /needle have a look Pete Link to comment Share on other sites More sharing options...
SpitFire6 Posted October 16, 2020 Report Share Posted October 16, 2020 48 minutes ago, Pete Lewis said: on some there used to be a small screw in the rear to zero the bourdan tube /needle have a look Pete I thought the zero screw would be visible at the front? Bourdon tubes can be very very accurate. Zero use in a control environment. I'm all for electronic ones. Link to comment Share on other sites More sharing options...
Iain T Posted October 19, 2020 Report Share Posted October 19, 2020 Bad news, the new oil pump has 90+psi pressure when cold and 75 when hot but still very little oil to the rockers!!!! The oil ways are definitely clear so it must be a cracked block????? The only solution, apart from a new block etc etc is to fit the dreaded external oil feeder and update the relief valve. The engine guy has done this to a racing Triumph and all seems ok. Is it still necessary to reduce the feeder hole down to 0.8mm'ish diameter? I'm not happy!!!!!!!!! Iain Link to comment Share on other sites More sharing options...
NonMember Posted October 19, 2020 Report Share Posted October 19, 2020 If you loosen the bolt where the spawn-feed would connect to the head, while idling, do you get oil out of there? If so, the problem is in the rocker shaft assembly, and fitting the spawn-feed won't help at all. Link to comment Share on other sites More sharing options...
Steve P Posted October 19, 2020 Report Share Posted October 19, 2020 I was advised to fit one to my Herald 1500 with a tuned new engine which had Goodparts roller rockers,even with a 1mm hole it filled the rocker box with oil which then filled the catch tank i had for venting. Could have been blow by by a not ideal break in process but still,0.8 or less i reckon. BTW my engine grenaded after 500 miles with water in bore no 2. Steve Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 19, 2020 Report Share Posted October 19, 2020 if you dont restrict the banjo bolt then there is unrestricted pressure bleed off from the galleryand subsequent reduced pressure to the crank 0.5mm has been the normal restriction , you need to tap and pug the banjo bolt bore thread a end of a bolt in and drill a small hole through it there may be an easier way !!! but unrestricted oils the rockers with a serious disadvantage to the rotating bits i might have one in the shed already blocked must have a look Pete Link to comment Share on other sites More sharing options...
Iain T Posted October 19, 2020 Report Share Posted October 19, 2020 1 hour ago, NonMember said: If you loosen the bolt where the spawn-feed would connect to the head, while idling, do you get oil out of there No not a lot of oil coming out, the problem seems to be in the block. The new relief valve spring is a lot stiffer than the original so perhaps this was part of the problem causing pick up on the mains/big ends farthest away from the pump. I will reduce the diameter of the banjo bolt hole. The only other option is new block, bore, hone, pistons etc etc Link to comment Share on other sites More sharing options...
Iain T Posted October 19, 2020 Report Share Posted October 19, 2020 Another slight relief to my external oil feed worries is because I have the bushed rocker arms there should be far less oil seepage than with standard tolerance rockers. All will be fine......... Link to comment Share on other sites More sharing options...
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