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I have replaced all of my heat exhangers on my W-58 engine twice using Nautical Development Co. in Michigan. They make exchangers for the Navy, etc. and are reasonably priced. They have drawings, etc for the w-58. Jim Roberts
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Has anyone had experience with a failed heat exchanger on the V Drive?
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Someone here on the list has just disconnected it from the loop and swears
the drive never gets hot. I believe them. Walters doesn’t recommend it,
naturally. There is no way to fix it as it’s integral to the case. Others
have cleaned and epoxied it as a stop-gap measure.Bob
On Fri, Jun 10, 2011 at 10:40 PM, Thatcher A. Stone wrote:
Quote:Has anyone had experience with a failed heat exchanger on the V Drive?
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Bob, I am an idiot about the v drive. Does it have its own heat exchanger Or does it share a “loop” with the main one on the engine?
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Hi Thatcher,
The v-drive has its own internal heat exchanger – water comes from the
thru-hull, then through the v-drive at the top, then to the pump and on to
everything else. At the top of the v-drive is a plate with 6 bolts. Under
that is where the water flows.Some of those chambers have rusted through or have become clogged with
scale. I know I’m not looking forward to opening mine…Bob
On Sat, Jun 11, 2011 at 7:19 AM, wrote:
Quote:Bob, I am an idiot about the v drive. Does it have its own heat exchanger
Or does it share a “loop” with the main one on the engine?
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To those of you that have disconnected the V drive heat excanger, have any of you steamed along for more than 6 or 8 hours?
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Thatcher,
I disconnected my heat exchanger last year. I bought an infrared thermometer as
a safety measure. This winter we had several long motoring opportunities, one
was 35 hours. Using the thermometer I measured the temperature multiple times
and I never saw any temperatures above 120 F. I have a Perkins M 4-108 and I
keep the revs below 2500.When I removed the V drive’s cover plate I had a disaster going. The cooling
cavity was nearly blocked and three or four of the tapped holes that accepted
the bolts were rusted to the point that the upper part of the housing was
crumbling away. I honestly don’t know how any water managed to get through the V
drive’s heat exchanger to cool the transmission and the engine. Now I have
significantly improved water flow to the transmission and engine heat
exchangers.I had some water in the V drive so I pumped everything out, filled it with oil
and ran it for an hour or so then I repeated the process several times. Seems
to have worked.When I was growing up in central California there were lots of drag boats on the
lakes. Many of those boats were powered by blown 454 engines that developed
massive amounts of horsepower. Nearly all of them had a V Drive. If those V
drives could handle three or four hundred horse power surely they can handle the
measly 50 HP the Perkins develops.Lee
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Lee, very helpful.
A little confused – you reconnected? If not, how is the water now in your v
drive?
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Thanks Herb. So you’d do it again if your v drive exchanger failed?
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Sorry – the water in the V drive was there when I started the clean up. As I
said the heat exchanger was rusty and deteriorating when I opened it up the
first time.Lee
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Ok, many thanks.
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Here is the thread when I started this same conversation a while back:
https://www.pearson424.org/bb2forum/viewtopic.php?t=994
And some pics of mine:
http://www.flickr.com/photos/deepplaya/tags/waltervdrive/I ended up putting the lid back on with RTV gasket (liquid) and not hooking
it back up to the water cooling system. I have the hoses there in case I
needed to, but I’ve motored for 6-8 hour with it this way and it doesn’t
seem to get very hot at all. I also have the infrared temp gub form harbor
freight to keep an eye on it. I think if I did hok up the hoses water would
probably spray out of the thing.-p
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s/v Deep Playa | Pearson 424 Hull #152 | http://www.DeepPlaya.com | @DeepPlayaOn Sat, Jun 11, 2011 at 10:04 AM, wrote:
Quote:Ok, many thanks.
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Owners no more...
Thanks Dawn and Patrick!
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