11-11-2013, 08:58 AM #1
4Tec Naturally Aspirated Winterization Question - Antifreeze in Exhaust???
I have done some searching, but there is a wide variety of answers on this one and I can't seem to find a straight answer. I just moved to Virginia and have two 155hp naturally aspirated skis that are stored in an unheated storage unit. I looked at the maintenance manual and it really only talks about using antifreeze for the supercharged engines for obvious reasons (intercooler), but they do also mention the exhaust.
I know that the raw water inlet to the ski back drains out the flush port, so I am guessing that the only water would be in the water box and not the tubing that feeds the exhaust. I know that the exhaust jacket would drain into the water box as well. So would blowing out the water boxes be sufficient for freeze protection, or do I actually need to dump antifreeze in the water box?
11-11-2013, 06:25 PM #2
Help! I'm absolutely jam packed on getting all these boxes unpacked. The garage is jam packed. Just not sure that I need to worry about them with a 26 F forecast tomorrow night.
11-12-2013, 11:37 AM #3
Treat NA and SC the same. You need to mix antifreeze with ALL the raw water throughout the ski and lube the valves/cylinders. This video is very good.
11-12-2013, 05:00 PM #4
Wonder what that carbon ring will look like while he just lets it run and run with no cooling
11-12-2013, 05:29 PM #5
Agreed. I think the only debate is does the exhaust manifold really drain or not. I think the air clear procedure is a logical procedure in my case where I don't have time right now to fog. I will get to it in the next couple weeks.
11-12-2013, 06:11 PM #6
The ext is self draining. The only water should be in the water box which is fine.
If the water trapped in the waterbox freezes solid it's not a problem. The ice will expand ~15% and is free to slide around in the box.
11-12-2013, 06:40 PM #7
That's why I decided tonight to leave it in bed at the storage facility. Not to mention that it was bounced across many states and different transports. I can't believe there is any water in any place but the water box. Again, I always appreciate the help here. It's helps to have someone to bounce ideas off when in a tight box like I am in.
11-12-2013, 09:50 PM #8
- Join Date
- May 2008
- Elephant Butte New Mexico
if you can't do much else, pull the injector rail and give each hole a solid shot of fogging oil. Same with the spark plugs. 30 minutes tops
11-12-2013, 10:02 PM #9
I think I'm just gonna pay to have it done this year. Just too much going on to work on skis right now. That will be a first to pay for it.
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