engine overheat

[dcbartlett]

major incident last sunday, first on friday hooked hose to boat everything was fine then on sunday went to river was out about 10 minutes and all of a sudden a big bang shut it down and had alot of smoke comming from engine compartment finally put fire out and had to throw water on it. one of the exhaust tubes has a hole blown in it and all of the bellows are milted even to the outdrive. its a 2001 5.0 volvo gm. what caused this, the engine starts and dont see any water in oil, the temp read 180 but it has to be wrong

 

[kmarine]

Re: engine overheat

Impeller replacment on the seawater pump. should be done every couple of years. no water, no cooling. Replace all melted parts and impeller. Then test for cooling. On the hose, your impeller was still pumping, probably broke appart in high rpm once you hit the throtle.
you will want to check guages after repairing. your temp sensor may need to be checked against an Ir temp gun.

 

[tpenfield]

Re: engine overheat

major incident last sunday, first on friday hooked hose to boat everything was fine then on sunday went to river was out about 10 minutes and all of a sudden a big bang shut it down and had alot of smoke comming from engine compartment finally put fire out and had to throw water on it. one of the exhaust tubes has a hole blown in it and all of the bellows are milted even to the outdrive. its a 2001 5.0 volvo gm. what caused this, the engine starts and dont see any water in oil, the temp read 180 but it has to be wrong

A fire extinguisher would be good for you, if you do not already have one (or two) on your boat.

You should find out more about the 'bang' that you heard . . . could have been the water pump . . . could have been the exhaust pipe coming apart from the heat.

Sounds like you did not have any water going through the engine . . . it is surprising that you got 10 minutes out of it. 180 seems high as a temp for that engine, is that the normal temp? When you start an engine it takes a while for it to come up to temperature, but the exhaust temp rises real quick, if there is no water mixing with it to keep it cool.

 

[willocreek1202]

Re: engine overheat

The temperature gauge may be right. The 180 degrees is higher than it should be, but the real problem could be that the water passages are starting to narrow from build-up. The high exhaust temperatures and lack of cooling will melt everything you said. Do a compltete check of you cooling system would be my advice.

 

[dcbartlett]

Re: engine overheat

thanks for all the enfo, my insurance comp is taking care of it because of the fire, they may total the boat whitch i hate but then i can get a newer one. they are talking about 8 to 9 thousand to repair.

 

[tpenfield]

Re: engine overheat

Wow . . . I didn't get the idea from your post that the damage (and fire) was that extensive. A newer boat would be good for you at this point. Keep us posted.