Mayo

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jchesshyre
Posts: 341
Joined: Wed Jun 15, 2016 8:09 am
Location: Chester, Cheshire

Mayo

Post by jchesshyre » Sat Jun 02, 2018 9:32 pm

I noticed a bit of mayonnaise in the rear valve cover breather earlier. I have been doing rather too many short journeys recently - is this the likely cause (condensation in the rear head - highest point of the engine?).

I damn well hope I don't have a blown rear head gasket. Coolant level doesn't seem to be falling.

I might do a compression test tomorrow.

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tony.mon
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Re: Mayo

Post by tony.mon » Sun Jun 03, 2018 12:57 pm

It is worth keeping an eye on but could just be a little coolant that dropped into the cases when someone took the clutch cover off.
A decent run should evaporate it off, so wipe it clean and head out for a couple of hours and recheck.
It's not falling off, it's an upgrade opportunity.

jchesshyre
Posts: 341
Joined: Wed Jun 15, 2016 8:09 am
Location: Chester, Cheshire

Re: Mayo

Post by jchesshyre » Sun Jun 03, 2018 3:04 pm

The clutch cover hasn't been off for a while. But I have a nice 250-mile round trip to do week after next so will check it then.

If it was the head gasket, would the coolant even be able to get up to the valve cover? There's zero sign of any emulsion in the sump.

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VTRDark
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Re: Mayo

Post by VTRDark » Sun Jun 03, 2018 4:38 pm

If coolant gets into the oil then it will go where the oil goes. But if it was the head gasket you woud have overheating issues too. It's probably just condensation build up mixed in with some oil vapour. Clean it up and keep and eye on things. When was the oil last changed.
==============================Enter the Darkside

jchesshyre
Posts: 341
Joined: Wed Jun 15, 2016 8:09 am
Location: Chester, Cheshire

Re: Mayo

Post by jchesshyre » Tue Jun 05, 2018 12:27 pm

VTRDark wrote:
Sun Jun 03, 2018 4:38 pm
If coolant gets into the oil then it will go where the oil goes. But if it was the head gasket you woud have overheating issues too. It's probably just condensation build up mixed in with some oil vapour. Clean it up and keep and eye on things. When was the oil last changed.
Yeah definitely no problem with the cooling system so I think I'm in the clear for that.

I last changed the oil 4,000 miles ago. I usually let it run the full 8,000 miles ( :Beer Popcorn: ) because I use the bike more or less every day and try and avoid short journeys, and decided to trust Honda on this figure, but on this occasion I'll change it soon as (a) I've been doing too many short journeys and (b) I topped the Motul 5000 (semi) that's in there with 5100 (ester semi) which seems to have not been a good idea - oil consumption has gone up noticeably since I did so (which I hope isn't indicative of some other problem). I'm using Shell AX7 next time as it was nice and cheap from Opie.

I'll definitely change it before I ride to York next week and then have a look after that.

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