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TOPIC: 4588 hurth transmission oil creamy

4588 hurth transmission oil creamy 01 Aug 2017 20:18 #1

  • 1thefox1
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I'm currently on a trip in an area with very few marinas. I'm heading up wind and up current. Last week on a crossing we were caught in 8 to 10' waves. There was several hard hits as the boat landed (short waves). I noticed a few days later oily residue on the surface coming from that engine. It was missing some prestone every day so I figured it was the seals on the cooler of the manifold. We ran 36 hours in 3 days. This morning I checked the transmission oil and was missing 3 quarts. Added them and ran 10 minutes to check again. The oil is creamy... I have a bad feeling that means the cooler on top of the transmission is leaking. I have another 250 miles to go. Any advice?

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4588 hurth transmission oil creamy 01 Aug 2017 22:30 #2

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I agree with your diagnosis it looks like a gearbox oil cooler leak. You don't want water contamination in your gearbox.
I'd be inclined to continue on one engine until you can arrange a replacement cooler.

Ian

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Ian & Emma
MV "LaPaloma"
1990 4588
Hauraki Gulf
Auckland
New Zealand

4588 hurth transmission oil creamy 01 Aug 2017 22:46 #3

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I'd look at your next port of call and have a cooler flown there. They are not all that expensive or heavy, or hard to replace.

If it were me I'd bypass the oil cooler, change the oil, and run the boat only at displacement speed, monitoring the tranny temp carefully.
If it looked to be getting hot, I'd then run on one engine, and just use the other one for docking maneuvers

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KEVIN SANDERS
4788 LISAS WAY
SEWARD, ALASKA
www.mvlisasway.com

4588 hurth transmission oil creamy 02 Aug 2017 00:31 #4

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That's what I'll try to do tomorrow (have cooler flown in). Spoke with a car mechanic friend of mine and he agrees I urgently need to flush the contaminated oil that has salt water in it.

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4588 hurth transmission oil creamy 02 Aug 2017 16:53 #5

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Happened to me. I flushed the tranny four times to remove any water residue after by passing the cooler by connecting directly the in and out hoses with a barbed fitting. the brake pads on the clutch disks dissolve in water!
Despite this, when the transmission was later overhauled, they found a lot of water damage on the clutches.
Since then, I carry a spare cooler in my spare parts list.

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NILE
1989 3288MY 305's US Marine
Fort Lauderdale Florida

4588 hurth transmission oil creamy 02 Aug 2017 20:56 #6

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nile wrote: Happened to me. I flushed the tranny four times to remove any water residue after by passing the cooler by connecting directly the in and out hoses with a barbed fitting. the brake pads on the clutch disks dissolve in water!
Despite this, when the transmission was later overhauled, they found a lot of water damage on the clutches.
Since then, I carry a spare cooler in my spare parts list.


Yes, I was thinking about carrying a spare cooler now. The one I ordered has a zinc in it to help reduce corrosion. I went a different way to clean mine. I did an oil change, then used 3 quarts of oil pouring them in the inlet pipe of the cooler and let the tranny spit it out into a bucket. After that did another full change and repeated the procedure.

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4588 hurth transmission oil creamy 02 Aug 2017 21:08 #7

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Lets just say no one could find a cooler or it was a week out, could tees and a few hoses be added and the two trannys cooled from one cooler? I have no idea how much heat the trannys throw off or how much heat a cooler can absorb or how big your coolers are. Sorry, I'm a what if kind of guy.
Not knowing where you are and if you decide to run on one engine please contact the proper authorities and check in from time to time.
Maybe over time one transmission would take on all the fluid and the other would become bone dry.

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Dan
Frostbite Falls, Minnesota
Claudia V. III
1988 - 3218
Gas Drives
Last Edit: by floatyerboat.

4588 hurth transmission oil creamy 02 Aug 2017 22:25 #8

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floatyerboat wrote: Lets just say no one could find a cooler or it was a week out, could tees and a few hoses be added and the two trannys cooled from one cooler? I have no idea how much heat the trannys throw off or how much heat a cooler can absorb or how big your coolers are.



I like your question. Always good to think outside the box. I'd be curious to find out.

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4588 hurth transmission oil creamy 02 Aug 2017 23:08 #9

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Last time I replaced mine, both were still functioning, so kept them as get home spares. Figured I could pressure test them before use.

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Started boating 1965
Bayliners owned: 26 Victoria, 28 Bounty, 32, 38, and 47 since 1996

4588 hurth transmission oil creamy 02 Aug 2017 23:28 #10

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What gave you the idea to replace them, preventative maintenance?

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Dan
Frostbite Falls, Minnesota
Claudia V. III
1988 - 3218
Gas Drives

4588 hurth transmission oil creamy 02 Aug 2017 23:55 #11

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floatyerboat wrote: What gave you the idea to replace them, preventative maintenance?


Age

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Started boating 1965
Bayliners owned: 26 Victoria, 28 Bounty, 32, 38, and 47 since 1996

4588 hurth transmission oil creamy 05 Aug 2017 05:20 #12

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Installed new cooler, no time to paint. Go go go, 224 miles to do in 2 days.

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