What would happen if you forgot to winterise?

[lw395]

I understand in minute detail exactly not only what an engine exhaust looks like but how it works.

Are you actually suggesting that we should remove the wet exhaust hosing, remove the injection elbow and then either remove the manifold or spray it internally with anti-corrosion spray if it's not removable, if the engine is not going to be run for several weeks?

Is this a wind-up?

Richard

No, I'm suggesting it's good to remove the exhaust hose, so there is no source of water vapour going straight up the manifold.
If you like, spray some oil, wd40 whatever up the elbow.
I thought this was standard practice, it's what everyone I know used to do before the interweb started blathering on about antifreeze in the seawater system.
Alternatively, be sure to run the engine at least once a fortnight.

 

[RichardS]

Because the exhaust pipe is lower than the manifold ... by significant amount.

As I understand it, it's that significant distance of exhaust pipework between the valve head and the part where the water flows that is under discussion. I would call that stretch of dry pipework the internal manifold.

As LW395 says, the only way I can see to protect that stretch of manifold against any dampness in the air would be to disconnect pipework and spray something up towards the valve. I've never heard of anything like that before.

In the case of my engines, it's virtually impossible to remove the short stretch of wet hose from either the elbow or the trap because it's just too stiff and there is too much overlap. I would need to unbolt the four elbow bolts to get at the dry manifold.

Richard

 

[RichardS]

No, I'm suggesting it's good to remove the exhaust hose, so there is no source of water vapour going straight up the manifold.
If you like, spray some oil, wd40 whatever up the elbow.
I thought this was standard practice, it's what everyone I know used to do before the interweb started blathering on about antifreeze in the seawater system.
Alternatively, be sure to run the engine at least once a fortnight.

OK I understand. I can't say that I've ever heard of that before but, if it is easy to break the hose between the injection point and the trap on an engine, I can see that it might be a good thing to do during the winter lay-up. There's certainly nothing to lose other than forgetting to connect it back again before the engine is run but that's just an admin issue like many others.

Richard