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My W60 did the same as Rich’s. When I put the new Cummins in the overflow
tube ran into the engine pan. The overflow was a nasty cocktail of coolant
and the oil that was the protective coating for the tubing in the heat
exchanger. It left a wonderful mustard stain in the new pan. Thankfully I
had not painted the pan but used pigmented epoxy. Gary from Deaton’s
recommended doing it that way so cleaning is not an issue, just a wipe with
the sponge and it’s gone. I asked Marcus from Trans Atlantic and he said
that the engine will find it’s level after a few hours of running. I moved
the tube to a small container to make clean up easier. It’s not a true
reservoir, just an overflow container to cut down on the mess.Linus
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I bought my 424 from a retired Navy Captain and he
always warmed the engine up with the radiator cap
loose and tightened it after the coolant got warm. I
never understood why but after reading all the
commentary perhaps it is to avert the vacuum/overflow
situation from occurring. We are cruising this
weekend so I will experiment around with loosening the
cap during the warm-up period and report back.
Bill Emberley
P424 “Running Tab”
— Linus Sumocean <> wrote:Quote:My W60 did the same as Rich’s. When I put the new
Cummins in the overflow
tube ran into the engine pan. The overflow was a
nasty cocktail of coolant
and the oil that was the protective coating for the
tubing in the heat
exchanger. It left a wonderful mustard stain in the
new pan. Thankfully I
had not painted the pan but used pigmented epoxy.
Gary from Deaton’s
recommended doing it that way so cleaning is not an
issue, just a wipe with
the sponge and it’s gone. I asked Marcus from Trans
Atlantic and he said
that the engine will find it’s level after a few
hours of running. I moved
the tube to a small container to make clean up
easier. It’s not a true
reservoir, just an overflow container to cut down on
the mess.Linus
<.. snip>Post generated from Pearson424 Forum using Mail2Forum
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The fresh water side operates under pressure. The proper cap is rated for about 9 psi. An increase in pressure raises the boiling point of the coolant.
The tank is called a surge tank or a recovery tank. A valve in the 'radiator' cap allows the coolant to enter the tank as the air and coolant in the system expands and build pressure.
When the engine cools the air and coolant contract creating a vacuum in the system with unseats another valve in the radiator cap allowing coolant to be drawn back into the system. The surge tank ensures that air isn't drawn back into the system.
The valves in the cap can fail and should be checked periodically or replaced. Most diesel shops will have a cap tester. It looks similar to a radiator pressure testing hand pump.
Something as simple as a liter drinking water bottle with the overflow hose pushed through a hole in the screw cap will function as a surge tank. Mount it as high up in the compartment as you can.
Chuck
On Fri, Aug 29, 2008 at 2:06 PM, Bill Emberley < ([email][/email])> wrote:
Quote:I bought my 424 from a retired Navy Captain and he
always warmed the engine up with the radiator cap
loose and tightened it after the coolant got warm. I
never understood why but after reading all the
commentary perhaps it is to avert the vacuum/overflow
situation from occurring. We are cruising this
weekend so I will experiment around with loosening the
cap during the warm-up period and report back.
Bill Emberley
P424 “Running Tab”— Linus Sumocean < ([email][/email])> wrote:
Quote:My W60 did the same as Rich's. When I put the new
Cummins in the overflow
tube ran into the engine pan. The overflow was a
nasty cocktail of coolant
and the oil that was the protective coating for the
tubing in the heat
exchanger. It left a wonderful mustard stain in the
new pan. Thankfully I
had not painted the pan but used pigmented epoxy.
Gary from Deaton's
recommended doing it that way so cleaning is not an
issue, just a wipe with
the sponge and it's gone. I asked Marcus from Trans
Atlantic and he said
that the engine will find it's level after a few
hours of running. I moved
the tube to a small container to make clean up
easier. It's not a true
reservoir, just an overflow container to cut down on
the mess.Linus
<.. snip>Post generated from Pearson424 Forum using Mail2Forum
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