Paul Mason Posted December 30, 2017 Share Posted December 30, 2017 Don't worry, not another Christmas turkey joke........have heard a noise when starting my 1.8k from cold (which, as I bought the car in October and live in the North, it's always been cold thus far). Thought it was a "clack clack" as the tappets filled. As oil pressure spot on (c. 70 on tickover immediately after starting) and as the noise goes fairly quickly (c. 90 seconds) didn't worry unduly. However, started the car today to cure a bit of silicon I've put on the exhaust primary joint, with the nose off and the car on stands and the "clack clack" is actually a "cluck cluck" seemingly eminating from the dry sump pump (a Pace one). Noise went and oil pressure all spot on as per usual. Is this usual for a pace pump? The clucks seem to be in time with the gushes of oil back into the top of the oil tank? Thanks as ever in advance Link to comment Share on other sites More sharing options...
F355GTS Posted December 30, 2017 Share Posted December 30, 2017 TADTS Clucking oil pumps are perfectly normal Link to comment Share on other sites More sharing options...
Paul Mason Posted December 30, 2017 Author Share Posted December 30, 2017 Spot on, thanks Mark......I was hoping for the "they all do that sir" response. Just for my own curiosity, why does it quieten down, it it just as the oil goes through the pump and lubes everything? Link to comment Share on other sites More sharing options...
7 wonders of the world Posted December 30, 2017 Share Posted December 30, 2017 The noise is not from the either of the oil pumps it comes from the rear main oil seal as the Pace system is correctly set up as a sealed system, meaning at idle the scavenge pump is capable of pulling a good partial vacuum in the crankcase, so air enters momentarily via the rear main seal.As RPM increases so does piston blowby so the level of crankcase vacuum is reduced hence the seal is no longer deformed as a route of entry for air. Link to comment Share on other sites More sharing options...
Paul Mason Posted December 30, 2017 Author Share Posted December 30, 2017 Thanks for the explanation 7 Wonders.......I think I understand. Seveducation is progressing (slowly but surely) Link to comment Share on other sites More sharing options...
SM25T Posted December 30, 2017 Share Posted December 30, 2017 The Caterham Chicken. Link to comment Share on other sites More sharing options...
Paul Mason Posted December 30, 2017 Author Share Posted December 30, 2017 Mine can't be a chicken though.......she flies!! Link to comment Share on other sites More sharing options...
SM25T Posted December 30, 2017 Share Posted December 30, 2017 Chickens can fly. Link to comment Share on other sites More sharing options...
Paul Mason Posted December 30, 2017 Author Share Posted December 30, 2017 I always thought they just dropped to the ground with a slight degree of delay? Whatever they do, yes, does indeed sound like I have a Caterham chicken Link to comment Share on other sites More sharing options...
oilyhands Posted December 30, 2017 Share Posted December 30, 2017 It was originally dubbed as the ‘funky chicken’ many years ago on the original SLR, common phenomenon.Oily Link to comment Share on other sites More sharing options...
Paul Mason Posted December 30, 2017 Author Share Posted December 30, 2017 Thank you Oily. I was confident that there wouldn't be a problem with it......after all there's an invoice from your good self in the cars history file, so the engine must be a gud'un!! Assuming I've associated the right name with the pseudonym that is...... Link to comment Share on other sites More sharing options...
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