Re: Acid flush raw water system.....
Depco do a great job. You might give them a shot at rebuilding both pumps. Also make sure none of the sewater intake hoses are soft- if they delaminate, they can obstruct the flow of water under suction from the pump, they will actually close up a bit.
Re: Acid flush raw water system.....
Quote:
Originally Posted by
madhatter1
Oscar, When I had overheating issues on my 34 it was never one problem. A series of issues that all added up. Intake, impeller, rubber pieces stuck, fuel cooler, trans cooler, All contributed some. Then on once with a new impeller raw water did not flow right. That turned out to be worn lobe on the pump itself that would not flip the impeller blades enough anymore. Didn't even know that was possible.
Save yourself some time. Go through every aspect of your cooling and raw water systems as a whole. Then grab some more sunrises and sunsets.
Doing it, one step at a time.
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Re: Acid flush raw water system.....
And here are the afters..... Although it appears to have improved I am not having a "wow" moment.
Re: Acid flush raw water system.....
I would change the thermostats and seals. One theromstat that sticks just slightly short of fully open can cause the same issue.
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Re: Acid flush raw water system.....
Quote:
Originally Posted by
oscarvan
And here are the afters..... Although it appears to have improved I am not having a "wow" moment.
I don’t like that either. What solution are you using?This is what it’s supposed to look like.
Re: Acid flush raw water system.....
Quote:
Originally Posted by
racclarkson@gmail.com
I don’t like that either. What solution are you using?This is what it’s supposed to look like.
Klean Strip Concrete and metal prep..........
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Re: Acid flush raw water system.....
Quote:
Originally Posted by
SKYCHENEY
I would change the thermostats and seals. One theromstat that sticks just slightly short of fully open can cause the same issue.
New thermostats in stock. And I agree with that assessment. It was the next thing on the list. Which brings me to the following......
The manual I have is (also) for trucks. They have radiators and things look slightly different. The main characteristic of the thermostat housing is the square with four bolts. I am 99% the first pic is it on top of the fresh water pump with the electrical temperature probe in it's body. (Not visible in the pic) I assume the sender on top is the alarm.
So that begs the question: What is the second pic? Square housing, 4 bolts, connected to the fresh water reservoir and the transmission oil cooler in the bottom of the reservoir/heat exchanger. It also has the mechanical temp probe in it. (Visible in the picture) Out of the bottom comes a tube to the exhaust manifold.....
Re: Acid flush raw water system.....
You have thermostats on each bank. I have four per my 12/71. You can test the thermostats. But I think you’ve got to get those pipes clean. Mix is 17 quarts water to 3 quarts acid for 5 gallons total. Probably 90 mins and a good rinse.
Re: Acid flush raw water system.....
I would suggest a slide hammer seal puller to replace the seals and new bolts when you reinstall the housings.
Re: Acid flush raw water system.....
Quote:
Originally Posted by
racclarkson@gmail.com
You have thermostats on each bank. I have four per my 12/71. You can test the thermostats. But I think you’ve got to get those pipes clean. Mix is 17 quarts water to 3 quarts acid for 5 gallons total. Probably 90 mins and a good rinse.
AHA! TWO thermostats. That makes sense. And yes, that's what I did with the acid wash. Ran it through for almost two hours with a small submersible bilge pump and 1-1/8" hose. Plenty of flow and plenty black.