Think I blew it up??

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CapnRon
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Joined: Tue Jan 30, 2018 5:36 pm

Think I blew it up??

Postby CapnRon » Tue Jan 30, 2018 5:57 pm

:banghead:
I have a dart csb bored to 434 with dart racing heads and a Holley 950 modified carb. I was cruising along then lost power. Turned around and had steam blowing out the exhaust. Not just a little either. Motor will still turn over without any bad noises but a lot of compression is gone. Turns out the alternator bracket broke dropping both belts off, so no water flow. Hopefully just badly warped heads. But we will see. Up next will be the 6.2 supercharged lsa. Taking bets on how much damage to engine.

dave1971
Southern Airboat Member
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Re: Think I blew it up??

Postby dave1971 » Wed Jan 31, 2018 12:15 pm

head gasket for sure!!!! hopefully no scoreing in the cylinders.

swamper2
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Location: harsens island michigan

Re: Think I blew it up??

Postby swamper2 » Wed Jan 31, 2018 12:26 pm

Had that happen to me and the boat was 2 miles in rough territory. had to pull the heads out there (fiel repair) and got her going and now problems for 10-12 years.
I would hang on to that 434 sbc good chances it will out perform the LSA but not an expert
16ft alumitech/406sbc/2.38w/3-80in.R's

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Deano
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Re: Think I blew it up??

Postby Deano » Wed Jan 31, 2018 12:34 pm

Doesn't sound like putting your gauge(s) a little closer to your line of sight would be a bad idea.
Conversely if that's not possible, putting your line of sight closer to your gauge(s) may not be a bad idea.
"The suppression of uncomfortable ideas may be common in religion and politics,
but it is not the path to knowledge; it has no place in the endeavor of science."
- Carl Sagan

loudmouse
Southern Airboat Member
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Joined: Tue Jan 22, 2013 3:20 pm
Location: Ocala Fl

Re: Think I blew it up??

Postby loudmouse » Wed Jan 31, 2018 4:20 pm

Hopefully it didn't torch out the head or block when the gasket burnt out. Might try making a habit of glancing at the gauges every 30sec to a minute while underway. I also pay very close attention to the tone of the engine and with any change from normal start looking for the reason. Good luck with the repair. Old school sbc are pretty tuff and you should have it up and running in no time...
15' Alumitech deckover LSX TT Oxbox 84" JX 4-blade
Gas required Water optional :dontknow:
Built and Tuned by Me
14'X8' JW, Chevrolet 122CID LNF Turbo Engine, Ox box, 80" NGR 3 blade

Life is short, eat your dessert first! :downtown:

swamper2
Southern Airboat Member
Posts: 409
Joined: Mon Apr 12, 2010 8:05 pm
Location: harsens island michigan

Re: Think I blew it up??

Postby swamper2 » Wed Jan 31, 2018 6:30 pm

another thing to check is upon start take a look at your exhaust pipes. the leaker will be pumping steam before a catastrophic failer
16ft alumitech/406sbc/2.38w/3-80in.R's

Lwells
Southern Airboat Member
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Location: okeechobee

Re: Think I blew it up??

Postby Lwells » Thu Feb 01, 2018 11:12 pm

I'm thinking about putting a mirror on my boat so I can glace back to see what's going on.

swamper2
Southern Airboat Member
Posts: 409
Joined: Mon Apr 12, 2010 8:05 pm
Location: harsens island michigan

Re: Think I blew it up??

Postby swamper2 » Fri Feb 02, 2018 9:16 am

A mirror might help but a walk back on start up on trailer or ? would be better especially in warm weather. I was thinking about a pressure gauge in the cooling system might give indication of the beginning of a leak after you establish a normal operating reading. Just a thought
16ft alumitech/406sbc/2.38w/3-80in.R's

loudmouse
Southern Airboat Member
Posts: 479
Joined: Tue Jan 22, 2013 3:20 pm
Location: Ocala Fl

Re: Think I blew it up??

Postby loudmouse » Fri Feb 02, 2018 9:42 am

U have gauges that will tell u everything u need to know and what the gauges dont say ur ears can hear. Make a habit of glancing down at ur gauges every 30 sec to a min. If that is too much trouble move them to where its not.
15' Alumitech deckover LSX TT Oxbox 84" JX 4-blade
Gas required Water optional :dontknow:
Built and Tuned by Me
14'X8' JW, Chevrolet 122CID LNF Turbo Engine, Ox box, 80" NGR 3 blade

Life is short, eat your dessert first! :downtown:


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