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oil leak
Apr 19, 2015 13:09:58 GMT
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Post by rusty on Apr 19, 2015 13:09:58 GMT
Was running the bike yesterday and although it was running finr I noticed a smell of burning oil..stopped the engine so it could cool down..after a while I saw a few droplets on the ground underneath the oil filter so thought it would be a simple case of tightening the filter...I was wrong:-/
I saw that the top of the engine was wet around number 3 plug cap, that wetness was also over the front of the engine which is what was running down around the filter and onto the exhaust/floor
I've looked at the gaskets and they all look ok, the rocker cover bolts are all tight and I can't explain where the oil is coming from:-(
Any ideas??
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Post by captain chaos on Apr 19, 2015 13:21:42 GMT
under the rocker cover there are four gaskets around the plug holes. Maybe no.3 is not seated correctly?
If any oil leaks to the spark plug, there's a small hole between the spark plug area and the front of the engine, just below the exhaust port. The oil will come out there.
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oil leak
Apr 19, 2015 15:14:25 GMT
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Post by rusty on Apr 19, 2015 15:14:25 GMT
Well the oil looked as if it was coming out of the ht lead as it was dripping off it...I've had a closer look and one of the rocker cover bolts was a little loose and there was a lot of wetness around it...ive tightened it up now but I can't see the bolt being loose as the problem:-/
Unfortunately I can't get the rocker cover off with the engine in situ to check the gaskets:-/
I've cleaned it all off now so will have to see if it keeps doing it and maybe this time have a better look to where its coming from:-/
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Post by p4ddy on Apr 19, 2015 15:33:44 GMT
Still not had any luck with removing that cover then. Got any pics yet? I ran my bike up recently without a cover bolt & it didn't spit oil out so I would have thought you'd have a leak to that extent through a loose bolt.
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oil leak
Apr 19, 2015 15:42:43 GMT
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Post by rusty on Apr 19, 2015 15:42:43 GMT
Still not had any luck with removing that cover then. Got any pics yet? I ran my bike up recently without a cover bolt & it didn't spit oil out so I would have thought you'd have a leak to that extent through a loose bolt. I think the captain is probably right as it all seems to be coming from around number 3 plug, around the underneath of the plug cap was wet with oil too...couldn't see or feel any in the plug chamber tho:-/ As for pics yes ive taken some and will post up in a mo
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Post by jaydee on Apr 19, 2015 16:00:19 GMT
Run your finger (under the no.3 downpipe) to check for oil which would be dripping down the drain hole that Captain mentioned. It'll confirm if it's leaking from the plug tunnel rubber gasket.
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Post by rusty on Apr 19, 2015 16:51:47 GMT
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Post by rusty on Apr 19, 2015 16:55:28 GMT
arrgghh bloody pics not the right way round jaydee...oil was running down the front of the engine to the point it was dripping onto the exhaust..it must have been doing it for a little while and ive only just noticed as i took the bike out the other day for a spin and didn't notice the burning oil smell untill i was running the engine on a paddock stand
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Post by jaydee on Apr 19, 2015 17:18:43 GMT
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oil leak
Apr 20, 2015 19:27:23 GMT
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Post by rusty on Apr 20, 2015 19:27:23 GMT
The oil drains are 6mm diameter and run at around 45 degrees from the bottom of the plug tunnels to the bottom of the exhaust ports. Hard to see the exits because the head gasket hides them. Philips screwdriver shows angle looks like your right..had a poke around where you mentioned and oil oil everywhere around the hole under number 3 downpipe...all the others are clean and clear
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Post by rusty on Apr 26, 2015 15:04:47 GMT
Had a bit of a play around this weekend and managed to get a look under the rocker cover enough to see that the oil seal the captain mentioned wasn't in the right place so I've repositioned the seal...it all looks correct down the plug hole so fingers crossed:-)
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Post by jaydee on Apr 27, 2015 13:57:45 GMT
If the seal wasn't in the right place, there's a good chance that the seals lip has been pinched when the rocker cover was torqued down. I put a light dab of grease on the seals and press them firmly in to their grooves to hold them in place. Opened a few rocker covers to find silicon gasket sealer gunged on to the seals, which is a big no-no. Fingers crossed that it'll seal now.
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oil leak
Apr 27, 2015 19:32:33 GMT
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Post by rusty on Apr 27, 2015 19:32:33 GMT
If the seal wasn't in the right place, there's a good chance that the seals lip has been pinched when the rocker cover was torqued down. I put a light dab of grease on the seals and press them firmly in to their grooves to hold them in place. Opened a few rocker covers to find silicon gasket sealer gunged on to the seals, which is a big no-no. Fingers crossed that it'll seal now. didn't think to use a bit of grease to hold it in place...just kept my fingers crossed lol out of interest why wouldn't you use silicon sealer or is that a stupid question:-/
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Post by jaydee on Apr 27, 2015 20:29:11 GMT
If the seal wasn't in the right place, there's a good chance that the seals lip has been pinched when the rocker cover was torqued down. I put a light dab of grease on the seals and press them firmly in to their grooves to hold them in place. Opened a few rocker covers to find silicon gasket sealer gunged on to the seals, which is a big no-no. Fingers crossed that it'll seal now. didn't think to use a bit of grease to hold it in place...just kept my fingers crossed lol out of interest why wouldn't you use silicon sealer or is that a stupid question:-/ I would never use silicon sealer anywhere above the crank cases, except for a sliver under each of the 4 half moons and the rocker cover gasket. Sealant isn't needed any where else if all the gaskets are in good condition and mating surfaces are clean. I opened the rocker cover on a bandit 12 last year to put in a set of K cams. It had silicon on the full surface of the rocker gasket and spark plug gaskets too. Good thing the owner didn't put it on the road since bought the bike. The sump strainer or oil ways would have blocked up from the attack of the rubber worms. Saw a bandit motor in a breakers a few years ago that had blocked up. The cams had melted their way through half the journals! smiley-shocked003
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Post by canamant on Apr 27, 2015 20:35:52 GMT
Silicone sealer can squeeze out from the mating surface if anything more than the merest smear is used. It then gets carried around with the oil. If you are lucky it gets to the sump wher the strainer or filter should catch it. If you are unlucky it can block an oilway on the way around. Think blood clot.
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