brian-nz Posted October 20, 2014 Report Share Posted October 20, 2014 Hi All I need to replace the gasket on my alloy sump. I think there is a good chance that there is more oil on the garage floor than in the engine, I have searched the forum for an answer but no posts on this particular subject Can anyone advise best solution Thanks Brian Quote Link to post Share on other sites
graeme Posted October 20, 2014 Report Share Posted October 20, 2014 Hi Brian, I found the Bastuck alloy sump on my 4A to be porous. I have coated it internally with a 2 part epoxy sealant. Just worth a check before you fit a new gasket. Cheers Graeme Quote Link to post Share on other sites
Lebro Posted October 20, 2014 Report Share Posted October 20, 2014 To answer the post's question - cork without doubt. De-grease the sump mating surface, then stick the gasket on with a good gasket sealer, eg. wellseal, then apply grease to top of gasket, & fit. Bob. Quote Link to post Share on other sites
Fireman049 Posted October 20, 2014 Report Share Posted October 20, 2014 Yes, I agree with Bob. I painted the inside of my alloy sump and alloy rocker cover with "Glyptal" oil resistant paint from Frost's. Tom. Quote Link to post Share on other sites
RogerH Posted October 20, 2014 Report Share Posted October 20, 2014 Hi Brian, cork gaskets look good, but!!! They have the ability for oil to seep into there structure and once through allow more oil through due to capillary action. The thinner paper type seal reduces this effect but is less good on a distorted sealing face. Remove the gasket altogether and use one of the quality sealants and you should have the perfect seal. Loctite5990 (I think) - Where is Ashley when you need him. The steel sump can and will distort when being bolted down - do not over tighten. The alloy sump has a better mating face but there have been problems with porous walls. Roger Quote Link to post Share on other sites
Motorsport Mickey Posted October 20, 2014 Report Share Posted October 20, 2014 Hi Brian, I knew the southern hemisphere accessed a different search engine from ours, if you search for "Sump gasket latest thinking" you'll see it was discussed at length and covers all the points raised above (paper v cork ) and a few more, I think it was in the last month. Mick Richards Quote Link to post Share on other sites
mleadbeater Posted October 20, 2014 Report Share Posted October 20, 2014 Brian, check the alloy flange is flat, maybe place on a sheet of glass to check. If Ok, use a bead of RTV ( silicone ) gasket sealer, no gasket should be needed. Try not to get excess sealer to inside, and be careful to remove excess if you remove the sump again, as the flashing can block oil-ways. Mike Quote Link to post Share on other sites
vivdownunder Posted October 21, 2014 Report Share Posted October 21, 2014 Brian, Permatex Ultra Blue RTV silicone is another good substitute for conventional gaskets. While the sump is off it's worth checking that the rear main seal is behaving itself. Viv Quote Link to post Share on other sites
mjdearing Posted October 21, 2014 Report Share Posted October 21, 2014 Buy a silicone oven baking sheet cut your own out then you have all the inside material for any other gaskets mine was 2mm thick Quote Link to post Share on other sites
brian-nz Posted October 25, 2014 Author Report Share Posted October 25, 2014 Hi All Thank you for all your advice. Just one other thing - I note that spring washers are used in the Moss catalogue. Are spring washers used for both the steel and alloy sumps or are flat washers used. Regards Brian Quote Link to post Share on other sites
RogerH Posted October 25, 2014 Report Share Posted October 25, 2014 Hi Brian, although not specified in the Moss Cat use a plain washer between the spring and the sump flange for both steel and ali. This will stop damage, improve sealing etc. Roger Quote Link to post Share on other sites
Fireman049 Posted October 25, 2014 Report Share Posted October 25, 2014 Hi Roger ~ You're perfectly correct ~ I've always used plain washers between the spring washers and sump. Tom. Quote Link to post Share on other sites
Lebro Posted October 25, 2014 Report Share Posted October 25, 2014 +1 Quote Link to post Share on other sites
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