Engine anode carrier 'plug' thread

[bluerm166]

Can anyone please advise what ,if anything, is best applied to the thread of the 24mm 'plug' that carries the zincs in a Yanmar. So possibly acting as a sealant or to make maintenance removal easier.The workshop manual makes no suggestion.There have been no leaks,simply inspection of the anodes.
Thanks in advance.

 

[prv]

I used to put ordinary white waterproof grease on mine, just to ensure they remained easy to undo.

Pete

 

[Pye_End]

Unwise to electrically insulate an anode?

 

[pagoda]

Unwise to electrically insulate an anode?

It's a big plug and a fairly coarse thread, I would be surprised if a little thread tape would be enough to isolate it..
If you don't put something on the threads, the torque needed to get the plug out a year later can be eye-watering!

 

[pagoda]

double post somehow!

 

[lydiamight]

Try this http://www.amazon.co.uk/Comma-CE500G-500g-Copper-Ease/dp/B003BPNOFO

As it is copper based it shouldn't act as an insulator

 

[sailorman]

is that a good idea in alloy heat exchangers

 

[AntarcticPilot]

I use vaseline. Seems to work fine!

 

[Cloven]

is that a good idea in alloy heat exchangers

As far as I know, only the raw water cooled Yanmar engines have an anode so no heat exchanger involved. Anode is set in the engine block.

 

[RichardS]

As far as I know, only the raw water cooled Yanmar engines have an anode so no heat exchanger involved. Anode is set in the engine block.

My anode is above the sail drive in the raw water inlet on a fresh water cooled Yanmar.

Changed mine recently and used rubber grease on the O-ring but nothing on the thread. They do not need to be massively tight as the o-ring is doing all the sealing work. A touch of grease on the thread would not do any harm. PTFE tape is more likely to insulate the anode unless used sparingly.

I have another thread about this from a few weeks ago as the anodes supplied by the UK suppliers I contacted are not nearly as long as the genuine Yanmar ones. In the end I bought the Yanmar ones and paid only a couple of pound more for twice the weight of zinc. From memory 55mm length zinc compared to 30mm alternatives.

Richard

 

[bluerm166]

Many thanks for replies.
On the 2GM20 direct cooled there are no gaskets on the anode carrier itself,it's more like a drain plug,merely a small O ring under the head of the zinc ,presumably against vibration.

 

[Avocet]

Funnily, I'm having exactly the same problem on mine! I'm using magnesium anodes this season (fresh water) and I've just snapped the remains of one off trying to unscrew it from the plug. I'm just resigned o drilling out the remains and re-tapping.