TR Paul Posted June 17, 2017 Report Share Posted June 17, 2017 (edited) Hello fellow TR6ers... I recently had my M.U. rebuilt by Neil Ferguson (a fine job he did, too) However, whilst fitting the injector hoses, I fitted the nos 2 & 5 pipes (the ones with the banjo unions) the wrong way round (with the pipes leading away from the engine, rather than towards it). Luckily I spotted this before fitting the unit on to the car, so I simply undid the unions, & put them back on, the right way 'round. Unfortunately I've now discovered the unions are weeping petrol. What I'd like to know, is this because I used the same (brand new) banjo seals when i turned the pipes 'round, as i did at the first attempt with the hoses, or is it because i couldn't tighten the unions to the very high torque wrench setting, as specified in the Brown Bible .... As ever, your thoughts & advice would be much appreciated Best wishes, Paul. Edited June 17, 2017 by TR Paul Quote Link to post Share on other sites
Andy Moltu Posted June 17, 2017 Report Share Posted June 17, 2017 There are two sorts of seals used on metering units. Some have o ring seals others dowty seals the latter are less tolerant of reuse. Quote Link to post Share on other sites
JohnG Posted June 17, 2017 Report Share Posted June 17, 2017 There are two sorts of seals used on metering units. Some have o ring seals others dowty seals the latter are less tolerant of reuse. Agreed Don't reuse Bonded Washers Quote Link to post Share on other sites
TR Paul Posted June 17, 2017 Author Report Share Posted June 17, 2017 OK, Thanks. sounds like I'll be fitting my spare (new) 'O'rings. Many thanks for your excellent advice, Cheers, Paul. Quote Link to post Share on other sites
John L Posted June 17, 2017 Report Share Posted June 17, 2017 Make sure the internal thick ring is well positioned into the MU before you try and fit the banjo bolts, don't put this ring onto the banjo and then try and refit. A little oil on the banjo bolt will help when tightening up. John Quote Link to post Share on other sites
k_raven_smith Posted June 19, 2017 Report Share Posted June 19, 2017 DO NOT OVER TIGHTEN THE UNIONS.just do them up by hand not to the setting in the book Quote Link to post Share on other sites
Denis Posted June 19, 2017 Report Share Posted June 19, 2017 I ground down a 3/4" ring spanner to tweek my banjos...you don't want leaks near yer dizzy or it goes off boom! Been there, done that! Quote Link to post Share on other sites
astontr6 Posted June 20, 2017 Report Share Posted June 20, 2017 Hello fellow TR6ers... I recently had my M.U. rebuilt by Neil Ferguson (a fine job he did, too) However, whilst fitting the injector hoses, I fitted the nos 2 & 5 pipes (the ones with the banjo unions) the wrong way round (with the pipes leading away from the engine, rather than towards it). Luckily I spotted this before fitting the unit on to the car, so I simply undid the unions, & put them back on, the right way 'round. Unfortunately I've now discovered the unions are weeping petrol. What I'd like to know, is this because I used the same (brand new) banjo seals when i turned the pipes 'round, as i did at the first attempt with the hoses, or is it because i couldn't tighten the unions to the very high torque wrench setting, as specified in the Brown Bible .... As ever, your thoughts & advice would be much appreciated Best wishes, Paul. Hi Paul, What was the condition of the banjos? Were they rusty? Or was the zinc & pass poor? Especially on the mating faces? Bruce Quote Link to post Share on other sites
duncan Posted June 20, 2017 Report Share Posted June 20, 2017 I know it is a serious topic, but I couldn't help hijacking it, as I thought it was about below Quote Link to post Share on other sites
TR Paul Posted June 20, 2017 Author Report Share Posted June 20, 2017 (edited) Hi Bruce, the banjos were shiny & new (as supplied with my rebuilt M.U) Neil- thanks for the warning on over-tightening the banjos; when I was tightening them, I had the M.U. mounted in a vice, & could only get to a certain level of tightness (well below the factory torque figure), before the unit started slipping in the vice; I didn't want to wind the vice up any more, as I was frightened of damaging my precious M.U! God only knows how the factory (Lucas or S-T?) came up with such a high torque figure?! Cheers, Paul. Edited June 20, 2017 by TR Paul Quote Link to post Share on other sites
astontr6 Posted June 20, 2017 Report Share Posted June 20, 2017 Hi Bruce, the banjos were shiny & new (as supplied with my rebuilt M.U) Neil- thanks for the warning on over-tightening the banjos; when I was tightening them, I had the M.U. mounted in a vice, & could only get to a certain level of tightness (well below the factory torque figure), before the unit started slipping in the vice; I didn't want to wind the vice up any more, as I was frightened of damaging my precious M.U! God only knows how the factory (Lucas or S-T?) came up with such a high torque figure?! Cheers, Paul. They had a bench jig for assembly and fitting up! Bruce Quote Link to post Share on other sites
TR Paul Posted June 22, 2017 Author Report Share Posted June 22, 2017 Subtle, yet cunning.... Quote Link to post Share on other sites
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