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Can trans cooler crack?


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Winterized my LXI today which has the 340 Monsoon. After draining and filling with anti-freeze, I noticed the trans cooler with the hoses that run off the water intake. They did not look very friendly to remove. Do I have to take them off? If so, up at the head or down by the transmission? What about the dripless packing clear plastic line. Mine was zip tied and didn't look like it had been off. Should it come off? Final question: If I will be running the boat again in 4 months or so, do you really need to fog the plug holes?

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Winterized my LXI today which has the 340 Monsoon. After draining and filling with anti-freeze, I noticed the trans cooler with the hoses that run off the water intake. They did not look very friendly to remove. Do I have to take them off? If so, up at the head or down by the transmission? What about the dripless packing clear plastic line. Mine was zip tied and didn't look like it had been off. Should it come off? Final question: If I will be running the boat again in 4 months or so, do you really need to fog the plug holes?

I suspect the hoses you are referring to are the brass colored connections on the side of the oil cooler in the attached picture. Those are full of trans oil - you do not want to disconnect those. You do however want to pull off the larger hose on the lower end of the cooler to make sure the water is drained out. You will want to look up inside to clean out any weeds/other junk that gets caught there and blocks water flow.post-60-004797000 1289787236_thumb.jpg

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Winterized my LXI today which has the 340 Monsoon. After draining and filling with anti-freeze, I noticed the trans cooler with the hoses that run off the water intake. They did not look very friendly to remove. Do I have to take them off? If so, up at the head or down by the transmission? What about the dripless packing clear plastic line. Mine was zip tied and didn't look like it had been off. Should it come off? Final question: If I will be running the boat again in 4 months or so, do you really need to fog the plug holes?

I disconnect the dripless line and try to get the trapped water out of it. The way it is routed it can trap water. I pumped a little bit of RV antifreeze through it, just to be safe.

It is easy to zip-tie back on in the spring.

Most on here do not recommend fogging the individual cylinders. Unless you have the ExCat exhaust, you can spray fogging fluid thru the intake.

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I suspect the hoses you are referring to are the brass colored connections on the side of the oil cooler in the attached picture. Those are full of trans oil - you do not want to disconnect those. You do however want to pull off the larger hose on the lower end of the cooler to make sure the water is drained out. You will want to look up inside to clean out any weeds/other junk that gets caught there and blocks water flow.post-60-004797000 1289787236_thumb.jpg

I don't see a big hose on the lower end. Both small hoses run to parts of the transmission but are rubber hoses pressed on--like hydraulic hoses--which are then fastened by nuts onto the trans. I'll get a pic up tonight yet.

z

Is the cooler the tube thing that the hoses connect to? If so, you are talking about the 2" rubber line that is hose clamped to bottom, right? Sorry to be a pita

Edited by FarmerZ
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I disconnect the dripless line and try to get the trapped water out of it. The way it is routed it can trap water. I pumped a little bit of RV antifreeze through it, just to be safe.

It is easy to zip-tie back on in the spring.

Most on here do not recommend fogging the individual cylinders. Unless you have the ExCat exhaust, you can spray fogging fluid thru the intake.

Those zip ties on dripless have been known to come loose during use. pumps lots of water into bilge. Change the zip tie out to a good stainless hose clamp.

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Is the cooler the tube thing that the hoses connect to? If so, you are talking about the 2" rubber line that is hose clamped to bottom, right?

Yes, that's it. And yes, Sunrise was referring to the larger diameter hoses that attach to the ends of the cooler tube.

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Yes, that's it. And yes, Sunrise was referring to the larger diameter hoses that attach to the ends of the cooler tube.

And you also want to pull it so you can check for debris, because debris (seaweed, impeller pieces) can get caught in the top end of that hose where it goes into the housing. Look for a honeycomb type of filter at the housing and make sure it is clean. That's on my 350 Merc, but I think yours has the same.

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Yup, that's what I meant. Like I said, those hoses with the pressed on brass fittings actually have trans oil in them, not water. The oil flows up to the oil cooler, then passes across/between a bunch of smaller diameter tubes inside the cooler that contain lake water (water and oil compartments are separate), then passes back out of the cooler back to the transmission. So when you pull off that large rubber hose from the bottom end, you are draining the water portion of the cooler, which is the only part you have to worry about freezing.

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