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Unread 03-31-2010, 07:49 AM   #1
70sElvis
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1991 YJ Wrangler 
 
Join Date: Jul 2007
Location: Ellisville, Mississippi
Posts: 252
Flowkooler install story

I finally got around to installing the troubling Flowkooler waterpump. I say troubling because I had to go round and round until I got the correct pump. Mostly my own fault (with a little assistance from 4wd.com). HINT: Always make sure you know which way your water-pump turns. Some turn clockwise and some turn counter-clockwise. Pump went on fine but when I want to bolt on the pulley on front of the pump, luckily I tried turning the pulley on the shaft before bolting it up. I heard a little metal scraping sound as I turned it. After looking at the two water pumps, I saw where the original water pump had a flat water inlet. The flowkooler had a round inlet. I at first thought about grinding a little off of the inlet but then I remembered how much it had been bored out for more water flow. I ended up sticking four small washers between the pulley and the shaft(one on each bolt). This moved the pulley just enough not to scrap but not enough to cause anything to be out of line with the belt.
Also make sure you check your lower hose to make sure it has a spring in it. It is recommended in the install instructions. Since this pump is supposed to increase water pressure, I made sure I checke dall of my hoses (including heater hoses) and tightened all of the clamps. Fired her up and success. I let the engine come to normal operating temperature with no leaks. I noticed it was about 20 degrees cooler than normal which helped my electric fan to stop cycling as much.

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Unread 03-31-2010, 09:52 AM   #2
Joe Dillard
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1991 YJ Wrangler 
 
Join Date: May 2004
Location: King George, VA
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Nice. Thanks for sharing.
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Unread 03-31-2010, 08:28 PM   #3
moonshinefuel
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1995 YJ Wrangler 
 
Join Date: Feb 2009
Location: Los Angeles. California. United States.
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I can share my experience with Flowkooler. I bought one almost 2 years ago through 4wheelparts store. It arrived, they called me. I opened the box at home. Mine came with 2 gaskets. Reason being was you have to move the pump a little further away from the engine block because the pump blades had a plate pop riveted over it to capture more water apparently. Problem I had was even with the extra gasket, the rivets were still hitting the exterior wall of the piston cast on the block when I tightened the pump bolts down, and spun the pump shaft. What I had to do was literally bend the blades of the pump a little closer to the pump housing, just to get that little extra clearance away from the engine block. That was frustrating as I was pressed for time and did not have time to just return it, and I would have if I had time. I ran that pump for almost a year. I did like it, and liked the concept. It moves more volume of water through the engine at lower rpms. The bearing proved to be strong. What happened was it started leaking from the doubled gaskets. Gaskets are not made to be doubled up like that. I had a factory new waterpump, so I just replaced it with that. I still have to Flowkooler pump on the shelf, just sitting there with the pop rivets and circular sheet metal shroud secured to the blades. It is an interesting concept, but a design flaw imo in how they made mine. I don't know if they improved the design or not on the ones they are selling now. I would hope so. I would buy another one if that is the case, if not, they can keep it.

Last edited by moonshinefuel; 04-01-2010 at 12:02 AM..
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Unread 04-01-2010, 07:37 AM   #4
70sElvis
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1991 YJ Wrangler 
 
Join Date: Jul 2007
Location: Ellisville, Mississippi
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Bummer! Luckily I did not have an issue with the pump fitting too close in the engine block. I was able to use just one of the gaskets.
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Unread 04-01-2010, 10:04 AM   #5
moonshinefuel
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Maybe they addressed the problem then. That's good. Are they using the pop rivets and circular sheet metal fabrication design on top of the pump blades?
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Unread 04-01-2010, 11:57 AM   #6
70sElvis
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Location: Ellisville, Mississippi
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It had the circular sheet of metal but I am going to be honest, I dont think it had rivets. It may have actually been made onto the blade. I wish now that I had paid more attention to that.
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Unread 04-01-2010, 03:40 PM   #7
moonshinefuel
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1995 YJ Wrangler 
 
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That sounds much better if they have that new design. You probably would have noticed the rivets. It stands out, it did for me anyways.
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