RussGT6 Posted February 7, 2023 Report Share Posted February 7, 2023 Hi everyone. I appear to have a leak from the underside of the aluminium oil filter adapter. Is this an easy fix? Any advice on how would be appreciated. Thanks in advance. Link to comment Share on other sites More sharing options...
JohnD Posted February 7, 2023 Report Share Posted February 7, 2023 Two oil seals in the groove? Or has the old one gone solid? JOhn Link to comment Share on other sites More sharing options...
Clive Posted February 8, 2023 Report Share Posted February 8, 2023 the old version of the adaptor was supplied with a selection of O rings of different thicknesses so the inner and outer could be chosen to account for any machining discrepency. If somebody has used too thick an inner seal (or teh other way round) that may be the source of the issue. You need to remove the adaptor and have a look. Later versions have a "floating" inner section which is spring loaded. New seal sets should be available from Mocal (who make them) or indeed the usual suppliers. Or measure the O rings and try a bearing supplier/ebay Link to comment Share on other sites More sharing options...
JohnD Posted February 8, 2023 Report Share Posted February 8, 2023 Good call, Clive! Russ, those original Mocal filter adaptors came with a small piece of BluTac. Yes, that stuff for posting notes etc on the Fridge! The idea was to do a trial assembly with the BluTac on the sealing ring, no O-ring. Take it apart and measure how I thin the Blutac had been compressed, and use the correspondingly thick O-ring. Only two were supplied, hardly a range! John Link to comment Share on other sites More sharing options...
johny Posted February 8, 2023 Report Share Posted February 8, 2023 Yes perhaps in Russ case the thick inner one was used when it shouldnt have been as the outer one usually seals pretty well. Might be worth checking the tightness of the fixing bolt to see if it'll reseal.... Link to comment Share on other sites More sharing options...
trigolf Posted February 8, 2023 Report Share Posted February 8, 2023 I had the same leak last year after the very cold snap. I'd changed the oil and spin on filter during the previous summer. Everything was oil tight until the very cold snap. I found that I could nip the filter up ( by hand), which sealed the leak. It's been fine since. I can only think that the filter sealing ring had shrunk during the very cold snap? Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 8, 2023 Report Share Posted February 8, 2023 what ever you do do not wrench up the centre bolt like a gorilla we have had in the past the whole threaded portion of the block get fractured out and wreck the block its easy for the 6 cyl orig to end up with two 0 rings as john suggested stuck down the Stepped sealing ring groove in the block there have been a few Tee shirts for that one Pete Link to comment Share on other sites More sharing options...
johny Posted February 8, 2023 Report Share Posted February 8, 2023 3 hours ago, trigolf said: I had the same leak last year after the very cold snap. I'd changed the oil and spin on filter during the previous summer. Everything was oil tight until the very cold snap. I found that I could nip the filter up ( by hand), which sealed the leak. It's been fine since. I can only think that the filter sealing ring had shrunk during the very cold snap? Yes I dont think this leak if from the filter seal but could be the lower temperatures which has caused the adaptor ones to shrink. The worst one is inside the adaptor as if that leaks the oil is flowing without going through the filter😭 Link to comment Share on other sites More sharing options...
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