Home > categories > Hydraulic & Pneumatic > Water Pump > How can you tell if a water pump is bad on a 454 mercruiser marine engine.?
Question:

How can you tell if a water pump is bad on a 454 mercruiser marine engine.?

The water pump doesn't seem to be leaking but I do have a leak under the engine in a place I can't get to. The water doesn't seem to be getting to the upper hoses of the engine. I do hear a odd sound like lose rocker arms but its hard to tell where its coming from.This engine is to big for this boat there is no room to work on it except to pull the engine. What was Four Winns thinking??? A simple fix is a major repair. Thanks

Answer:

drive your boat as fast and far as you can. at that point you will find if anything is broken. i say if it ain't broke don't fixit!!! if it brakes then you know what to fix. since it hard to get to your water pump just take your motor out and rebuild the whole thing. welcome to boating.
there is very much of hard paintings in getting that activity finished and the cooling gadget could desire to be flushed after that element additionally. i purely did a water pump on a 1999 ford contour and it grew to become right into somewhat worked given the area of that pump. as quickly as I have been given decrease back homestead, i grew to become into sore from my belt to my elbows for some days. a water pump could desire to final approximately one hundred,000 miles style of. i might have charged approximately that lots additionally. if that pump is inner to the block in the back of a conceal, the cost is going up on the subject of the hard paintings in touch.
Just like you do on the car since they are built somewhat the same. Most engine water pumps for cars have weep holes one on top and one below the water pump shaft. When the seal goes it will leak from the holes. Second test is grab the shaft or pulley and move it up and down and side to side without the belt on it and if it clicks or moves around its bad. Or remove the pump and check to see if the impeller is broken off or missing..
Welcome to the world of boating.We used to have to cut out a hole on the seats to change oil filters on the first service. I feel your pain! Your recirculating pump and your raw water pump are two separate systems. If your upper hoses are running dry I would check the raw water pump first. The rocker noise would concern me more. To separate the noise, run the engine on a garden hose attached to the incoming line inside the boat from the raw water pump when the lower unit is removed for the raw water pump job. That will separate the possible sources for the noise. If the noise followed the lower, check u-joints, gimbal bearing, gear housing. If it is still there, check the oil for water, and the recirculating pump, and valve lifters.(who knows, it might actually be a lifter.)

Share to: