View Full Version : water pump kit replacement
so i replaced my water pump and housing on the beach this last saturday. i didn't have any problems with the removal and install, i don't seem to have any leaks but the temp gauge reads a little higher than before. when i left the beach and throttled up the temp gauge climbed more than i'm used to seeing. it set and held at about 165-170 i'm guessing since there is no numbers between 140 and 180. it was getting dark and i really wanted to hammer the throttle to get back to the doc but i was afraid to hit it any harder. is it normal for one impellor to run hotter than another. i do plan to remove it again this week and take a look at it. there are a couple of 0 rings with the kit that i didn't use. i didn't see anyplace that needed them. where did i slip up????
digginfordollars
08-25-2008, 08:18 AM
You probably have some pieces of impellor in your oil cooler partially blocking water flow. The O-ring should have gone in a groove on the housing but there may have already been one there.
i did look for a spot for it, and the only place i could see where one was needed did have an o-ring already in place. when i pulled off the housing, the impellor looked complete. it was not tore up. i did not take it out of the housing though. looking back, that was probably not a good idea. the metal plate that goes between the housing and the part it connects was worn pretty badly. the pullies had been making a squealing under hard acceleration or if i turned the wheel too far. that noise seems to have gone away. i guess i need to go back and pull that impellor out of the old housing and see if it's still in one piece. then pull the hose off that runs across the bottom of the block and make sure it's clear as well. thanx.
Liquid Courage
08-25-2008, 12:48 PM
We have different motors, but my power steering cooler on the back of the block was partially blocked. Everyone told me the power steering cooler was a through hole with nothing to catch on. They were wrong. That is where my blockage was at.
Keith
the blockage makes sense. i was trying to watch the gauge real close and it did seem to drop off a bit when i slowed down. i'll make sure to pull it back apart before the next trip. it might become a real pain in the neck if i have to change the impellor during each trip :) i guess the positive side is that i'm getting much faster at changing it.
kevnmcd
08-26-2008, 07:20 AM
i was trying to watch the gauge real close and it did seem to drop off a bit when i slowed down.
That is normal. The engine creates a more heat as the rpm's increase. I run around 160-165 when pushing it hard but 150 when idling.
maybe i was just being overly paranoid, but i'll pull it apart anyway.
kevnmcd
08-26-2008, 07:40 AM
maybe i was just being overly paranoid, but i'll pull it apart anyway.
Just my .02 but if it is not leaking and not overheating, I wouldn't mess with it. It seems to be doing its job so why mess with it? Like I said...just my .02
RUNNIN A FEVER
08-26-2008, 08:43 AM
That is normal. The engine creates a more heat as the rpm's increase. I run around 160-165 when pushing it hard but 150 when idling.
I"m at about 170 at idle and nearly 180 underway. It's not overheating but with a 165 degree thermostat I'd figure it would be running less. I was told that EFI motors need to run hot. I've gone through the entire cooling system this year and I"m getting too much water pressure now (WTF).
I'm with Kevin at this point - it ain't broke don't fix it.
Liquid Courage
08-26-2008, 04:28 PM
the blockage makes sense. i was trying to watch the gauge real close and it did seem to drop off a bit when i slowed down. i'll make sure to pull it back apart before the next trip. it might become a real pain in the neck if i have to change the impellor during each trip :) i guess the positive side is that i'm getting much faster at changing it.
This is exactly what mine was doing, it only overheated once after a long WOT run. As soon as I slowed down the temp fell as well. It was just running warmer than usual otherwise.
wicked_tahiti
08-26-2008, 07:46 PM
im sure everyone has thought about this, but what if the old unit had an issue and didnt allow the engine to complete heat up, now that its functioning correctly its allowing you to run proper temps?
dunno just a thought since your still within the safe range, just a bit higher than before....
possible but doubtful. it's always run pretty much the same temp since i've owned it. it did run in the safe range but i was afraid to run it any harder for fear that the temp may climb higher and it was getting way too late and too dark for me to feel comfortable pushing it. i'm guessing the partial blockage is the reason. i'm hoping to get it pulled apart this weekend sometime. i'll let you's know what i find. thanx for all the input.
titties and beer
08-29-2008, 10:27 AM
mine runs 150-155
that's exactly where mine has always run as well. the temp is marked at 140 and the needle usually rides just a shade above that. this last time it was riding a shade under the 180 mark. i'm guessing a blockage. i would guess the harder i push the stick, the higher the temp would have climbed. it got me back to the dock, which is what counts, but i don't want to use it again until i see for sure.
aquaholicbum
09-04-2008, 05:07 PM
bring it by my house we can pull it apart and back flush the coolin tube, sounds like there may be debri in the ports. did u notice any chunks of rubber missing from the old rotor? the 500 hp is sooo easy to disassemble it can be done in like 15-20 minutes
aquaholicbum
09-04-2008, 05:10 PM
by the way-that squelling noise you heard was probably the rubber chuncks jamming up your pump and binding the belts causing slippage
i've become pretty good at pulling that stuff off. and the squelling was exactly that. it was bound up so tight in there that the pulling was not turning at all! my goal is to get it pulled back apart this weekend and check it out. i'm sure there is a blockage in there that's making it run hotter than usual. much thanx for the offer to help!!
akiwi
09-06-2008, 11:20 AM
I find the 496Mag HO runs at 150-155 but I have seen my temps go to 175 after a WOT run for a long way especially if I am trimmed up a lot. It drops down after backing off the gas for a while. :thumb:
I did actually blow my impeller out this last weekend. Had to have it serviced by Absolute this week - all better now - except the bill he sent me for the annual service and replacement of the impeller :eek3:
the problem is that i wasn't running hard when it was running that hot. i was only running about 50-55. as soon as i got back to the docs it cooled off. everything is telling me a blockage somewhere.
i just covered the boat up from tearing into it this evening. so far i have not found the culprit. i was hoping it would be as easy as pulling the hose that runs from the impellor/water pump across the bottom of the block over to what i believe is the oil cooler. i pulled it off, the water came out to fast so i didn't actually see any pieces of impellor in there but i did find a couple of pieces laying in the bottom of the boat. i did find a piece of black plastic in the neck to the cooler about the size of a nickel. no idea where it came from but i was hoping that would solve the problem. no dice. i hooked it up to the hose and ran it at idle until it warmed up to normal op temp. throttled it to about 1400-1500 and let it run there. sure enough, up comes the temp. shut it back down and pulled the new impellor housing off and it looks ok. i talked to my crew chief D4$ and now have the next step. tomorrow i'll try to backflush the oil cooler and see what if that solves the problem. the saga continues..........:insane::chin_scratch::cussing:
if i can remember i'll take a couple of pics of the old housing. it DEFINITELY needed to be replaced. i guess i'll be replacing it a bit more often. note to self, don't go 6 years before replacing the impellor housing.
i appreciate all of the input on this. slowly but surely, i'm becoming a hot boater! after i get this taken care of, the blower (not a supercharger type blower) is apparently not working now.
titties and beer
09-06-2008, 10:06 PM
james check your drive (water pick up to)might have sucked up something,do you have a sea strainer?if not PUT 1 ON!
no i sure don't T&B. looks like my list of winter purchases is getting bigger. are they difficult to put in?
titties and beer
09-07-2008, 08:55 AM
NOPE,
aquaholicbum
09-07-2008, 11:59 AM
not hard at all,just grab a hole saw and cut a hole in the bottom of your boat. how in the hell did u make it 6 years on an impellor??? mine gets changed twice a year, even with my sea strainer installed. u need to pull the hoses off both sides of the cooler and back flush it. all your symptoms are a clogged cooler--been there done that--lots of times, only difference is i run 100-110 degrees and hafta watch temps real close offer still stands!:thumb:
BOOO YAAAAAA!!!!!!!! just got everything buttoned up after backflushing the system. ran for a while on the hose and it ran nice and cool. it actually ran cooler than what i remember, which probably means it's been getting clogged for a while now. i know the real test will be at the lake under heavier throttle but it looks good so far.
and just for the record, i didn't go six years on one impellor. i went 6 years on the same impellor housing. the impellor gets changed every spring. this year being the exception, i've changed it two or three times this season :smashfreak: sometimes i'm a little slow to catch on :D
thanx for the offers to help and all of the advice. hopefully next weekend i'll find out for sure if it's cured :thumb:
only difference is i run 100-110 degrees and hafta watch temps real close offer still stands!:thumb:
do you really run 100-110 degrees??????? how the hell do you do that???
not hard at all,just grab a hole saw and cut a hole in the bottom of your boat.
i don't cut holes in my boat, i take it to D4$ house and let him cut the hole :laugh: it's been suggested before to put one of those in, so i may have to make that a winter project.
digginfordollars
09-07-2008, 10:45 PM
You don't have to cut a new hole in your boat to install a sea strainer, it goes in your existing line. Might have to drill a couple of holes for mounting, but not through the hull.
aquaholicbum
09-08-2008, 06:25 PM
damn that hole was for nothing!.. 100 degrees=3.3 whipple
100 degrees=3.3 whipple
maybe i should make THAT my winter project :thumb:
let's see, that should put me in the 700+ hp range, which in turn would probably put me in the 100-105mph club.........hhmmmmmmmm. look out keith :D
on second thought, maybe i'll just stick with the sea strainer. how much hp will that add :smashfreak: :D
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