Welsh plug sizes

evbrumby · Post by **evbrumby** » Sun Aug 03, 2008 11:50 pm

Hello all

I picked up a 82 mod brumby with the overhead valve 1800 motor yesterday.

It's in reasonable origional condition, a little rust here and there but not too bad for being on the wrong side of 25 years old.

anyway I have found some milky oil coming from the PCV system inlet pipe inside the air filter housing. the radiator coolant is clean and green and there is no obvious sign of water on the dipstick or under the oil filler cap so I am hopeing it's a welsh plug in one of the heads.

Does anyone know the size welshplug I need to get?

thanks.

steptoe · Post by **steptoe** » Mon Aug 04, 2008 7:05 pm

20 mm is what i bought for my EA81 OHV heads recently

evbrumby · Post by **evbrumby** » Mon Aug 04, 2008 7:29 pm

thanks steptoe

I ony need the motor to run for six months or so until I get all the pieces together to convert to plugin electric.

YouTube · Post by **El_Freddo** » Tue Aug 05, 2008 8:42 am

Unless your oil is creamy in the sump after a run I wouldn't worry about it. If a welsh plug was leaking you'd be using coolant and that coolant would end up in the sump with the oil.

What you're looking at is in the engine's crankcase ventilation system. I'd say that the engine only went out for short runs without getting up to full operational temp or being at op temp for long, the condensation that is picked up only gets as far as the PVC air hoses and before its all cleared away the engine is shut down.

We used to find this on the underside of the oil cap in our old VW - it was air cooled so there is no possibility of water getting to the oil unless we submerged the engine...

Take it for a long road trip of at least an hour's duration at speed - anything above 80 should do it good. Then when you get it home check the pipes when the engine is still hot and see what you find, plug it all back up then check them again when cold to see if there's been any change, if there is compare it to when it was hot after a good run.

Hope this does the trick and saves you alot of painful wallet emptying or skinned knuckles.

Cheers

Bennie

evbrumby · Post by **evbrumby** » Tue Aug 05, 2008 7:50 pm

Thanks for the reply el freddo. You may be on to something. The previous owner only had a five minute run to work and my drive home was a good 45 minutes. After finding the mess in the air filter I have left the radiator cap half off so the system does not pressurise and leak more coolant into the tappet cover (assuming there is a leak) I have driven her to work and back twice now which is a 25 minute run each way and haven't seen much more milky oil appear.
you make a good point so i'm going to tighten down the radiator cap and see what happens over the next fiew days with a long run up the freeway on the weekend.

thanks.

James

steptoe · Post by **steptoe** » Wed Aug 06, 2008 11:50 am

find some Silver Seal, comes in a carboard tube same diameter as about ten cent piece x 80mm, blue and red, sealed at each end metal caps. It is cheap and has sealed many a radiator and welch plug successfully in my experiences, you just have that failure lurking in the back of your mind though. Fixed my brothers radiator initially, he then forgot about the leak, the fix and the need to properly repair - two years later sold it - still without another thought about it !!