Water Circulating Pump--How do I Test
 

My starboard engine is running 30 degree's warmer than port--have replaced thermostat and sender, cleaned heat exchanger, oil coolers etc etc

At point of questioning the circulating pump. Is there an easy way to verify that it's working or not without removing from engine???

Poorsche

www.boatmat.com

Re: Water Circulating Pump--How do I Test
 

have you put your hand on the riser or other to verify it's not just the sender/gauge. Circ pumps don't really stop working unless the seal goes then it will run out the bottom of the pump. It's one piece from the pulley to the impeller.

Re: Water Circulating Pump--How do I Test
 

Probably should have stated that engines have Closed Cooling system--water thru risers would be raw (sea water). THe coolant in engines is 50/50 antifreeze water mix.

Poorsche

Re: Water Circulating Pump--How do I Test
 

Still,feel a hose that recircs,, and it can't really stop working unless the seal blows or the belt is off,,then you'd know it.

Re: Water Circulating Pump--How do I Test
 

Tempest,just because the guy didn't find the problem yet doesn't mean he's a IDIOT!What if his boat does'nt have a strainer or a thermostat,mine doesn't,Please tell us what then TEMPEST of knowledge!

Re: Water Circulating Pump--How do I Test
 

For the record -- when engines were out of boat we did clean out the strainers, coolers, flushed cooling system. Thermostat and sender was replace when proble kicked in before engines came out. Also rerouted plumbing, re-did the pickups from transom to thru-hull and took the heat exchanger off and flushed it and de-scaled.

Would a defective radiator cap contribute to problem?

Today I'm going to check wiring at gauge for voltage, switch guages from eninge to engine and see if problem follows wiring or is constant, check for good ground, check sender, and see what the RINDA engine analyzer says.

Damn I don't wnat to try and replace circulating pump with enigne in boat and I don't want to pull engine again.

Any tips to solve this mess sure would be helpful--

thanks--

Re: Water Circulating Pump--How do I Test
 

Tempest, the grown ups are talking - now go outside and play with yourself.

Re: Water Circulating Pump--How do I Test
 

I know a guy who had a similar problem with t575s. One motor ram hotter than the other. He took the water pump off the suspect enging and pulled the cover off the back. I don't remember exactly what he said was wrong with it, but the impeller was messed up. New water pump cured the problem.

Re: Water Circulating Pump--How do I Test
 

Tempest, what I meant was feel a hose or jacket at the same place on both motors to verify the 40 deg diff. the gauge is showing.Real simple test . I'm not familiar with new closed cooling systems ,and they may have an elec pump, but if it's the standard circ pump as in every American V8 for the last 50 yrs,,,The impeller and shaft are basically one piece and don't go bad,only the bearing and seals, then it blows antifreeze out the bottom.
Tempest,what's a termostate anyway?
Tempest,I do feel like bit of an idiot for arguing with you , but it's so easy:)

Re: Water Circulating Pump--How do I Test
 

Cooltoys,

Being an auto mech, I have seen the impeller go bad on cars before. Car water pumps, the impeller is steel, and boat are bronze I think because of river/lake and salt water in fresh water systems. I have seen steel car impellers eaten away with corrosion before where there were no blades left. With a closed cooling system, could he have a water pump with a steel impeller that has corroded away?

I'm having similar issues with my motor but don't want to pull the pump. Pain in the azz, back seat has to come out.

Re: Water Circulating Pump--How do I Test
 

Thanks for all the feedback regards this question.

I think I've broken the code. I hooked my RINDA tester up to MEFI and both guages are way off !!!

The engines according to MEFI are running at 158 and 163. The COOLER engine per MEFI is showing higher on the analog dash guage--175; the warmer engine per the MEFI is showing 150 on the analog guage.

I'm gonna order replacement LIVORSI REd Line Guages and see what the outcome is. In general I've been disappointed in the Livorsi gauges frm the get/go.. THye fog up, alway condensate under lenses and don;t read steady on consistent basis.

Film at 11--

Poorsche

www.boatmat.com

Re: Water Circulating Pump--How do I Test
 

Poorsche, Alot of good advice here from all of the above except for 1 individual. To save the expense of gauges try a reasonable maunual gauge from summit 1st on each engine to verify. Or better yet if you can can your hands on laser pointer digitable thermometer(aka infared heat gun), they work mint! They cost about $100. and is the best toy to have.
Tempest has a problem with people becuase he is restoring an older Bayliner and can not get parts for it. "Articfriends" saw him on the interstate towing a hobycat with an '81 chevette so pay no nevermind to him or her. He's probably a cross dresser and not sure which way he wants to go!

Re: Water Circulating Pump--How do I Test
 

ahaa

Re: Water Circulating Pump--How do I Test
 

lol, someone beat me to it

Re: Water Circulating Pump--How do I Test
 

Can we safely say he had it coming? I think it's the same person as "bluewater1".