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Messages - Erwin83
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31
« on: October 24, 2020, 08:09:09 AM »
Strange, I have two kits on ‘stock’. One for the 350f, one for the 400f.
One from Cruzin image. One from my dutch parts dealer. Both have the same seal without a lip, and checking parts sources online, like the link I posted, but also cross checking the OEM part number, you do come across the lipless replacement part quite frequently.
We’ll see what it does, if I still have a leak, you can count on an honest review here.
If it works.. great news because obviously not having to split the cases is quite a big deal.
32
« on: October 23, 2020, 11:24:35 PM »
I guess I'll find out.
33
« on: October 23, 2020, 10:39:56 PM »
Went for another ride the other day and AGAIN oil leaking. Sigh.
So tonight I borrowed another set of eyes and together with the owner of those eyes, we finally diagnosed the oil leak: it was in fact the crank seal and not the plug. 
Replaced the seal and tomorrow, if the weather is OK, I’ll go for another test ride. Fingers crossed.
B.t.w. The original seal has a lip, which makes removal a bit of a difficult task (without splitting the cases). The replacement seal (out of a complete kit with all the engine seals) comes without a lip. So it slides right in.
Strange, never seen a crank seal without a lip 🤔🤔🤔🤔
https://4into1.com/crankshaft-oil-seal-91201-323-005-30x45x8-cb350f-400f-500k-550-650/This is the one.
34
« on: October 23, 2020, 10:18:59 PM »
Went for another ride the other day and AGAIN oil leaking. Sigh. So tonight I borrowed another set of eyes and together with the owner of those eyes, we finally diagnosed the oil leak: it was in fact the crank seal and not the plug. Replaced the seal and tomorrow, if the weather is OK, I’ll go for another test ride. Fingers crossed. B.t.w. The original seal has a lip, which makes removal a bit of a difficult task (without splitting the cases). The replacement seal (out of a complete kit with all the engine seals) comes without a lip. So it slides right in.
35
« on: October 21, 2020, 08:16:42 AM »
Well, after having removed the plug, checked and cleaned the bore and the plug, and the O-ring multiple times... Not to forget clean my entire garage, floor, ceiling, door and part of the driveway of oil spatter...
I have accepted defeat and used a small smear of "liquid gasket" if that's the right word, on the outer ring of the plug. Let it sit for a night to cure and seems like it's staying dry now. Fingers crossed.
36
« on: October 19, 2020, 09:14:35 PM »
Are you sure that you have a 333 bung as, the 323 bung is shorter  The 323 bung has a depth of 16.50 mm but the 333 is longer .
Also if the bung has been pulled out with pliers, this damages the pip.
I don’t really know. The pip doesn’t look damaged at all. Could I have a 350cc and 400cc bung mixed up? Is that the difference between the 323 and 333?
37
« on: October 18, 2020, 01:22:01 PM »
This suggests to me that the "pip" on the plug has been shortened somehow
Should it indeed be flush?
38
« on: October 17, 2020, 04:13:54 PM »
With regards to the solution of the actual leak.. I found that the plug was snug in the bore when the outside of the plug is around 1 mm deeper than the surface of the cover. That would mean that the oil pressure always pushes the plug out that 1mm, creating a gap between the bore and the aluminium of the plug. As such completely relying on the O-ring for sealing.
I have now placed a small bit of gasket material between the plug and the actual gasket, therefore keeping the oil plug in a bit deeper mechanically.
I also did some better cleaning of the bore and plug.
Let’s see if that does the trick.
39
« on: October 17, 2020, 03:57:15 PM »
Not so much a puddle.. just a good 5 yards of spray, oil on the ceiling, bike's left side covered...
At least no questions about the performance of the oil pump...
40
« on: October 17, 2020, 03:55:05 PM »
Nope, if you run the engine with the alternator cover off that plug will disapear to the darkest, dingiest corner of your garage never to be seen again and a large puddle of oil appear under the engine
So I made a little plate to keep the plug in. Uuuuunfortunately...
41
« on: October 03, 2020, 04:58:41 PM »
I’ll go for the talk powder test. Although it looks bone dry in the area above the plug (direction crankshaft seal), I guess you never know.
I can safely run the engine without the alternator, as long as I unplug the fieldcoil, right?
Oh, and I’ll make some plate to prevent the plug from plopping out...
42
« on: October 03, 2020, 01:59:11 PM »
Yeah, it didn’t make any difference. Bummer.
I’m a bit out of ideas now.
How about making a little spacer so the plug is kept in deeper?
43
« on: October 01, 2020, 11:26:16 AM »
OK, I was actually able to gently tap the plug in about a millimetre further. I'll give her another warm up later today and see if there's still a leak. Fingers crossed 
44
« on: October 01, 2020, 08:28:47 AM »
It needs to be tapped in to place. Obviously not too hard, but firmly.
Hmm, ok. I just pressed it in with my thumb. It is snug though. The O-ring definately seems to be compressed. I'll try to give it a tap, see if it goes any deeper. You did fit it with the pin facing outwards? and the generator cover needs to be fitted to hold it in.
Yes, pin facing outwards. Cover mounted. I've not yet gone to the lenghts of making a plate to keep the plug in and be able to run the engine without the cover.
45
« on: October 01, 2020, 07:42:27 AM »
Hi everyone. I'm having difficulties beating an oil leak on my CB350f. I've already replaced the O-ring (#13) with a OEM Honda one (6 euro for an O-ring  ). Cleaned the hell out the area where the plug (#3) goes, took the plug out and cleaned again. Added a tiny smear of gasket to the plug on the outside of the O-ring... Still leaking. And not a weep, but quite big drops. Too much to ride around with. The area above the plug is dry as bone, so I have no reason to assume it would be the crank oil seal. There are also no visible oil traces from the oil pump area (on the side stand, it would drip to the lowest point on the casing, which is where I am leaking oil) Am I missing something? Do you have any suggestions?
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