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  #31  
Old 11-07-2013, 08:01 PM
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TOO-TALL TOO-TALL is offline
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Quote:
Originally Posted by Skyskiguy View Post
Dealer records indicate "Engine overheated and started to smoke" back in July of 2009.
They replaced a toasted impeller and dug/flushed out the pieces of rubber, cleared the codes, and it ran fine.
Check service records PRIOR to buying a used boat!
Dealer says hard to believe that an overheat could cause valve and/or ring damage because the boat would have gone into limp mode at 200 degrees.
Thoughts?
I feel your pain...When my motor blew I got no "limp" mode or over heat alarm.And I know it got hot.My problem was both head gaskets blew, water in the cyclinders...game over.

I've got a tread on here motor blew 1008 hrs.


Good luck...hope you find a easy fix.
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  #32  
Old 11-07-2013, 08:10 PM
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TOO-TALL TOO-TALL is offline
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What are BG products?
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  #33  
Old 11-07-2013, 08:31 PM
Skyskiguy Skyskiguy is offline
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BG specializes in petro chemical additives for engines. Sold mainly through auto dealerships and service shops. http://www.bgprod.com/company.html

Last edited by Skyskiguy; 11-07-2013 at 08:45 PM.
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  #34  
Old 11-07-2013, 08:45 PM
Skyskiguy Skyskiguy is offline
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Quote:
Originally Posted by TOO-TALL View Post
I feel your pain...When my motor blew I got no "limp" mode or over heat alarm.And I know it got hot.My problem was both head gaskets blew, water in the cyclinders...game over.

I've got a tread on here motor blew 1008 hrs.


Good luck...hope you find a easy fix.
Wow. Fortunately I'm not in that bad of a situation.
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  #35  
Old 11-07-2013, 08:53 PM
Skyskiguy Skyskiguy is offline
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Take a look at the oil after the BG treatments vs. new Rotella 15w40. Also, plugs 2 & 7 after treatments. These plugs were quite clean in the previous photos - all the plugs were pretty nasty after the BG did it's thing.
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  #36  
Old 11-08-2013, 06:48 AM
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For how long did you "cruise" at 5000/5200 RPM's? My ZR6 is rated for 5400 RPM Max and 4000 RPM's continuous cruise. I know these motors were designed to spin but prolonged operation at WOT or close to it will eventually have some negative effects. With that said I can't define "prolonged" but my old TBI has seen WOT a few times but only for the occasional barefoot run which is only going to last 30-45 seconds at best.
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  #37  
Old 11-08-2013, 10:20 AM
Skyskiguy Skyskiguy is offline
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Quote:
Originally Posted by Bouyhead View Post
For how long did you "cruise" at 5000/5200 RPM's? My ZR6 is rated for 5400 RPM Max and 4000 RPM's continuous cruise. I know these motors were designed to spin but prolonged operation at WOT or close to it will eventually have some negative effects. With that said I can't define "prolonged" but my old TBI has seen WOT a few times but only for the occasional barefoot run which is only going to last 30-45 seconds at best.
Ten minutes, maybe.
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  #38  
Old 11-08-2013, 10:35 AM
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Snake oil as you call it or additives rarely do anything good that is long lasting. It's kind of like a band aid that's gonna hurt when it gets removed.
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  #39  
Old 11-08-2013, 11:23 AM
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I worked at a both an independent higher end auto shop and a Ford dealer while in college, and they both swore by those BG products. Interesting to see the treatment actually did bring up the compression a little. Out of curiousity, did you ever scope the cylinders?
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  #40  
Old 11-08-2013, 11:38 AM
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Engine overheat causing engine to smoke? Never a good thing - obviously. I bet there is some underlying issues that will remain. Too_Tall's boat never smoked on that ugly day. But his thread does show some nastiness caused by over heat.

Not wanting to be the downer - but over heat causes sooo many problems that can show up later.

Good luck on the cheap repair hopefully - I personally would have the head gaskets replaced if I knew it had an over heat situation in the past along with smoke. Not much real estate between cylinders. Not cheap - but you get intake and heads reseated and new gaskets. IMHO... the engine guru's here know much more than me.
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