Sqealing sound
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Sqealing sound
My engine is making a horrible squealing sound when I rev the engine beyond an idle. It sounds like it is mostly coming from the front of the engine. I can feel water rushing into the thermostat housing and out to the exhause manifolds. I did replace the thermostat with one I purchased at West Marine. The flange was slightly smaller than the original one that was in there but it seemed to cover the hole and the gasket sealed. Any ideas. I have some suspicions but I want to her what you guys think my problem is.
Jon
Former Owner of F-26 "Tir Nan Og"
and looking for another Trojan
Former Owner of F-26 "Tir Nan Og"
and looking for another Trojan
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yep, check belts. i just replaced the port raw water pump and had same issue....good at idle but when revved squealed, tightened belts and all is good.............John
1972 Trojan Sea Raider F30 - FI 350's "Time Warp"
1998 Kawasaki ZXi 1100
1972 Chevy Fleetside Shortbed hotrod.......450hp
10.5 Newport Inflatable w/15hp Rude
1998 Kawasaki ZXi 1100
1972 Chevy Fleetside Shortbed hotrod.......450hp
10.5 Newport Inflatable w/15hp Rude
When my raw water pump impeller failed on the port engine the water pump locked up and the belt started squeeling, there was no water flow out the exhaust, so a week later when I heard the stbd belt start squeeling, sure enough the pump was locked up and no water flow coming out the exhaust. When the port pump failed, I bought 2 rebuild kits and I'm glad I had the other one on board when the stbd side failed, on the water, 50 miles from home.
1975 F-32 "SIMPLY BLESSED"
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The belts seem to be right tension and riding properly. I have seen lots of squeaky belt on old cars, but this sqeal sounds, well, I guess the best way to describe would be more gutteral...if that makes sense.
If the pump is failed would I feel water flowing into the Thermostat housing? I do now recall when I had it on the hard I would start it and it would get that sound, but once I turned on the water hose and fed in some water it went away. Could the water pressure from the house hose have been feeding it enough water, but not the pump by itself?
If the pump is failed would I feel water flowing into the Thermostat housing? I do now recall when I had it on the hard I would start it and it would get that sound, but once I turned on the water hose and fed in some water it went away. Could the water pressure from the house hose have been feeding it enough water, but not the pump by itself?
Jon
Former Owner of F-26 "Tir Nan Og"
and looking for another Trojan
Former Owner of F-26 "Tir Nan Og"
and looking for another Trojan
This is what a water pump impeller looks like after it fails. You can see that the broken impeller pieces can get jammed and brake the water jackets of the pump and stop the pulley from turning. The impeller needs replaced before running the engine.
and this is what the impeller should look like. This particular Mercruiser repair kit replaces the impeller housing, plate and end cap with a one piece housing.
You can do a search on here for "impeller" and find more info.
and this is what the impeller should look like. This particular Mercruiser repair kit replaces the impeller housing, plate and end cap with a one piece housing.
You can do a search on here for "impeller" and find more info.
1975 F-32 "SIMPLY BLESSED"
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Wowser's are down low, yours are close to the top at the front on the port side of engine (balancer facing bow). It may not be that bad. These can be tricky; mark everything so you put it back together properly. They can be reversed if not carefull and will pump the wrong way. FWC or RWC? Do you have a circ pump? Asking because some applications used dual pocket pumps (two impellers). Single pocket will have two hoses, dual pocket will have four.
She was a 1969 36 ft wooden beauty with big blue 440s that we'll miss forever.
And thanks to the gang, 2012 Trojan Boater Of The Year
And thanks to the gang, 2012 Trojan Boater Of The Year
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Last night as I was trying to locate the sqealing I was running the engine about 2000 rpm checking belt movement and feeling the water pressure in the hoses and the sqealing slowly dissappeared.
I was thinking maybe I just had not run it long enough at higher RPM since I had only idled it will on the hard with the garden hose attached.
I was thinking maybe I just had not run it long enough at higher RPM since I had only idled it will on the hard with the garden hose attached.
Jon
Former Owner of F-26 "Tir Nan Og"
and looking for another Trojan
Former Owner of F-26 "Tir Nan Og"
and looking for another Trojan