Steveb19 Posted July 14, 2017 Report Share Posted July 14, 2017 Hi Can anyone tell me size and thread of sludge trap plugs? thanks Steve Quote Link to post Share on other sites
Motorsport Mickey Posted July 14, 2017 Report Share Posted July 14, 2017 Give us a clue, what items are we talking about ? where are they located ? gotta give more to get more. Mick Richards Quote Link to post Share on other sites
Chilliman Posted July 14, 2017 Report Share Posted July 14, 2017 1/4" BSPT Quote Link to post Share on other sites
RogerH Posted July 14, 2017 Report Share Posted July 14, 2017 ...but what are they !!!!!! Roger Quote Link to post Share on other sites
Motorsport Mickey Posted July 14, 2017 Report Share Posted July 14, 2017 1/4" BSPT John, With respect how can you state that, none of us know what we are talking about, we can guess and that's one of the sizes that would be quoted, but if you've guessed wrong it could be totally off court and incorrect. We've got to encourage posters to give accurate information along with the questions asked, otherwise crap in, crap out. Mick Richards Quote Link to post Share on other sites
Drewmotty Posted July 14, 2017 Report Share Posted July 14, 2017 I assume that the OP was asking about the blanking plugs in the crankshaft webs. Quote Link to post Share on other sites
Grahamgl Posted July 14, 2017 Report Share Posted July 14, 2017 Sludge trap plugs are fitted into the crankshaft I think. Graham Quote Link to post Share on other sites
Chilliman Posted July 14, 2017 Report Share Posted July 14, 2017 Correct Quote Link to post Share on other sites
RogerH Posted July 14, 2017 Report Share Posted July 14, 2017 Hi Folks, its is interesting how things morph from a [retty normal engineering process into some oddity - a sludge trap The crank Web blanking plugs are not sludge traps (although sludge can get trapped there). These blanking plugs are used to blank a drilling that connects the internal oil way within the crank to the cross drilling in the big end - it forms a dog leg. I thought they were 5/16 UNF - and they are bloooody tight to undo. Roger Quote Link to post Share on other sites
TRseks Posted July 14, 2017 Report Share Posted July 14, 2017 (edited) Maybe it's because Triumph motorbikes had sludgetraps in the crank. As they didn't have proper oil filters but just a mesh filter in the oil tank they had a sludge trap in the crank that during the years would get filled with "sludge", a plug had the be removed and inside was a channel with an aluminium tube inside. The plug is usually very difficult to remove and the sludge trap is usually filled up with crap. Since Triumph cars have oil filters sludge traps are not needed? Or am I wrong, on motorbikes it is standard to clear this in any serious engine overhaul. Magnus Edited July 14, 2017 by TRseks Quote Link to post Share on other sites
Paul J Posted July 14, 2017 Report Share Posted July 14, 2017 Maybe it's because Triumph motorbikes had sludgetraps in the crank. As they didn't have proper oil filters but just a mesh filter in the oil tank they had a sludge trap in the crank that during the years would get filled with "sludge", a plug had the be removed and inside was a channel with an aluminium tube inside. The plug is usually very difficult to remove and the sludge trap is usually filled up with crap. Since Triumph cars have oil filters sludge traps are not needed? Or am I wrong, on motorbikes it is standard to clear this in any serious engine overhaul. Magnus + 1 cleaned many a classic bike sludge trap, should have be done regularly as access could be gained through a sump plug/plate. Always ignored often causing bearing failure. Quote Link to post Share on other sites
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