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One side of engine hotter than the other

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drginseng
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One side of engine hotter than the other

Post by drginseng » Wed Aug 13, 2014 11:19 pm

The port side manifold of my port engine is getting hotter than the other. A friend told me to unbolt the manifold and ream it out with a coat hanger or something to root out the rust blockage. Anyone know about this?

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evansjw44
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Re: One side of engine hotter than the other

Post by evansjw44 » Thu Aug 14, 2014 6:58 am

we need more details to help. Is this an early 283? Your's is a common problem with early 283s. They have a split coolinf system where each side of the egnie is cooled independently.
Jim Evans

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drrot
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Re: One side of engine hotter than the other

Post by drrot » Thu Aug 14, 2014 7:57 am

evansjw44 wrote:we need more details to help. Is this an early 283? Your's is a common problem with early 283s. They have a split cooling system where each side of the engine is cooled independently.
If you have dual exhaust check the water flow coming from each side of the engine. As the other Jim said the water pump is actually 2 pumps in one. Each half of the pump cools half of the engine.
Another test is to switch the lines coming out of the water pump and see if the hot side changes also.
Jim Staib
www.finewoodboats.com


1947 Penn Yan 12' Cartopper WXH474611
1950 Chris-Craft 22' Sportsman U-22-1532
1957 Chris-Craft 26' Sea Skiff SK-26-515
1968 Century 17' Resorter FG-68-174

jfrprops
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Re: One side of engine hotter than the other

Post by jfrprops » Thu Aug 14, 2014 8:17 am

I can add nothing to this question....as you have already received responses from two of the most knowledgeable guys around!
A bit more info and you will have your answer.

John in Va.
1980 Fairchild Scout 30
19?? custom Argentine Runabout 16'
1954 Whirlwind deluxe dual ckpt 16'
1921 Old Town Charles River 17' (founding Captain, James River Batteau Festival)

drginseng
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Re: One side of engine hotter than the other

Post by drginseng » Thu Aug 14, 2014 3:45 pm

It's twin 283s in a 1962 Connie. I like the idea about switching the water pump lines. You don't think there's crud built up in the exhaust manifold? I understand that there's one impeller in the water pump. How is that only half is cooling?

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mfine
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Re: One side of engine hotter than the other

Post by mfine » Thu Aug 14, 2014 3:53 pm

drginseng wrote:I understand that there's one impeller in the water pump. How is that only half is cooling?
If you only have one of the two impellers, that would explain why only one half is getting water flow, but I doubt that is your problem. More likely one side has more restriction to water flow or one side of the pump is generating less pressure.

drginseng
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Re: One side of engine hotter than the other

Post by drginseng » Fri Aug 15, 2014 12:21 am

I guess I wasn't clear. Is the one or two impellers in the pump? I'm think the chances are greater that rust has built up, too.

farupp
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Re: One side of engine hotter than the other

Post by farupp » Fri Aug 15, 2014 7:17 am

There are two impellers in the pump. One is for the port side of the engine and the other for the starboard side. If you take the pump out to replace the impellers you will see what we mean. There are other posts about how to replace the impellers.

Frank
Frank Rupp
1959 22-foot Sea Skiff Ranger
283 Flywheel Forward engine

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drrot
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Re: One side of engine hotter than the other

Post by drrot » Fri Aug 15, 2014 7:40 am

This might help
283 Pump.jpg
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Jim Staib
www.finewoodboats.com


1947 Penn Yan 12' Cartopper WXH474611
1950 Chris-Craft 22' Sportsman U-22-1532
1957 Chris-Craft 26' Sea Skiff SK-26-515
1968 Century 17' Resorter FG-68-174

farupp
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Re: One side of engine hotter than the other

Post by farupp » Fri Aug 15, 2014 11:26 am

Here are pictures of a disassembled 283 water pump showing the two impellers:
283 Two-chamber water pump 002.jpg
283 Two-chamber water pump 003.jpg
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Frank Rupp
1959 22-foot Sea Skiff Ranger
283 Flywheel Forward engine

drginseng
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Re: One side of engine hotter than the other

Post by drginseng » Fri Aug 15, 2014 12:04 pm

Thank you. Can I tell if my impellers are brass without opening it up? I've heard the brass ones are hard to get.

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Re: One side of engine hotter than the other

Post by farupp » Fri Aug 15, 2014 12:59 pm

The impellers in the pictured water pump, and on my 283 engine, are rubber. The pictured implellers are worn out. New impellers have straight, flexible blades, and are available from many sources including West Marine. I have several 283 water pumps and all have flexible rubber impellers. I have not seen one with brass impellers but drrot can tell you if they were made with brass impellers.
Frank Rupp
1959 22-foot Sea Skiff Ranger
283 Flywheel Forward engine

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mfine
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Re: One side of engine hotter than the other

Post by mfine » Fri Aug 15, 2014 1:34 pm

They were made with brass gears, rubber impellers and brass hubs with rubber vanes. The gear pumps have a grease cup that you fill with grease and screw in a bit every so often to help them prime. Detailed pictures from a couple angles would likely allow us to spot one.

The other two are hard to tell apart visually. If you remove the pump, there is a part number on the end plate where the cam connects to the generator or the pulley extension. There should only be 4 bolts to remove it and you should be able to get it off and see the numbers without having to remove the hoses.

drginseng
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Re: One side of engine hotter than the other

Post by drginseng » Sat Aug 16, 2014 12:12 am

Like the four bolts where the house is separated in the picture above?

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mfine
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Re: One side of engine hotter than the other

Post by mfine » Sat Aug 16, 2014 5:53 am

No. If you are looking at the bottom picture Frank posted with the tape measure and barely separated pump, the 4 bolts would be on the flange on the bottom right corner of the picture. On the line drawing that Dr Rot (Jim) posted, it would be the ring labeled as part number 4 in the upper right diagram. The part number is generally on the surface of that ring that you can't see when it is bolted in place.

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drrot
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Re: One side of engine hotter than the other

Post by drrot » Sat Aug 16, 2014 7:09 am

drginseng wrote:Thank you. Can I tell if my impellers are brass without opening it up? I've heard the brass ones are hard to get.

Rubber impellers look like the one posted. Brass gears have 2 shafts and look more like a figure 8
Jim Staib
www.finewoodboats.com


1947 Penn Yan 12' Cartopper WXH474611
1950 Chris-Craft 22' Sportsman U-22-1532
1957 Chris-Craft 26' Sea Skiff SK-26-515
1968 Century 17' Resorter FG-68-174

drginseng
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Re: One side of engine hotter than the other

Post by drginseng » Sat Aug 16, 2014 9:35 am

Got it. And that, when unbolted, will pull right out? I'm assuming the drive coupling fits in its counter piece to drive the pump.

Off subject--- anyone have a Connie or have knowledge?

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mfine
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Re: One side of engine hotter than the other

Post by mfine » Sat Aug 16, 2014 4:00 pm

It should come right off.

farupp
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Re: One side of engine hotter than the other

Post by farupp » Sat Aug 16, 2014 4:57 pm

Here are a couple of pictures showing the pump number as described by mfine. The number for this pump is M 10095 G. Ii is a spare for my 283 engine.
pump number 001.jpg
pump number 002.jpg
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Frank Rupp
1959 22-foot Sea Skiff Ranger
283 Flywheel Forward engine

drginseng
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Re: One side of engine hotter than the other

Post by drginseng » Sun Aug 17, 2014 12:43 am

Thank you. Good pictures and information.

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