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6V92 Question

  • Thread starter Thread starter Miss Swivel
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Miss Swivel

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Jul 8, 2018
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Status
  1. OWNER - I own a different brand
Hatteras Model
43' DOUBLE CABIN (1970 - 1984)
[FONT=&quot]Rather than try to translate “Brokerese” that complex language that nobody understands, I will paste the exact description; “in 2010 rebuilt starboard engine, new head, valves and three cylinders, replaced.” The engine is a 6v92. My question, is it normal to only replace one head and three cylinders on a 6V92? Or, is the owner just being cheap?[/FONT]
 
It's possible that the other cylinder head did not need to be replaced.

It's also possible that the overhaul was done for damage rather than just wear, and that the engine suffered some type of breakdown that took out one head and the liners on that side. I would be interested to see comments from folks who own DDs, which I do not (it's been decades).
 
A failed head can take out one cylinder and then water/debris may contaminate the lungs on the same side by way of the exhaust manifold.
Warranty, CYA and it's open-do it would be some of my thoughts if I was fixing the issue.
The tech working the repair probably did examine the other side and felt it was to good to go and not require servicing.

Now, questions for you.
That rebuild/repair was 15 years ago; How many hours then and now?
How many then and recent oil lab reports can you review?
What does YOUR real Detroit tech say? <<--- Soon to be your best friend.
What does YOUR Detroit surveyor say?
6V92 HP tune?
May I suggest 92s on the bottom of your shopping list.
 
Last edited:
As already posted it doing 1 head on a "V" engine happens all the time.
Since it's been 15 years the engine is most likely good to go.
My question would be how close are the engines to their next overhaul??
 
You see this with 92's a lot. The wet liner seals fail with age and take out whatever cylinders they're leaking into. Not uncommon. You can usually replace the seals and put kits on just the damaged cylinders, a full overhaul is usually not required. So with 92's yeah, it's common to have one head, or only a couple cylinders, damaged.
 
Captain Ralph said:
A failed head can take out one cylinder and then water/debris may contaminate the lungs on the same side by way of the exhaust manifold.
Warranty, CYA and it's open-do it would be some of my thoughts if I was fixing the issue.
The tech working the repair probably did examine the other side and felt it was to good to go and not require servicing.

Now, questions for you.
That rebuild/repair was 15 years ago; How many hours then and now?
How many then and recent oil lab reports can you review?
What does YOUR real Detroit tech say? <<--- Soon to be your best friend.
What does YOUR Detroit surveyor say?
6V92 HP tune?
May I suggest 92s on the bottom of your shopping list.
Click to expand...

I notice you differentiate between a Detroit Tech and a Detroit Surveyor. Wouldnt a Detroit Tech be the one to do the survey? Is there a different type of Tech that you would have survey it?
 
Miss Swivel said:
[FONT=&quot]Rather than try to translate “Brokerese” that complex language that nobody understands, I will paste the exact description; “in 2010 rebuilt starboard engine, new head, valves and three cylinders, replaced.” The engine is a 6v92. My question, is it normal to only replace one head and three cylinders on a 6V92? Or, is the owner just being cheap?[/FONT]
Click to expand...

We can only guess but I would put money on it was a broken ring on one cylinder. And the others were Don because while you’re there and the head and pan are off anyway. I don’t think it’s out of line to do one side of a 6 cylinder. But it’s a 92 with wet liners and rubber seals sealing a red hot liner. How long will the seals last before it starts leaking?
 
It s a repair, not a rebuild… typical broker BS.
 
Captain Cigar said:
I notice you differentiate between a Detroit Tech and a Detroit Surveyor. Wouldnt a Detroit Tech be the one to do the survey? Is there a different type of Tech that you would have survey it?
Click to expand...
Pending your environment (the swamp or S Florida);
These two jobs can be preformed by the same guy or entirely different guys. Sometimes from the same shop, sometimes not.
Here in the swamp, Bubba does it all.

A tech/mechanic fixes things.
An engine surveyor inspects things.

A real tech/mechanic has already lost his hearing.
An engine surveyor's ears are not usually blown out (yet) and can hear that lil ticking sound better. He also carries a sound level meter.

A real tech/mechanic makes more money fixing things.
An engine surveyor rarely gets his elbows dirty.

Some tech/mechanics look to get that emergency repair work he supposed to have just discovered.
An engine surveyor rarely gets his elbows dirty.

Most tech/mechanics are not marine engineers.
An engine surveyor may have some marine engineering background; Proper engine installation, proper sized/design propeller, proper engine room ventilation. He may also work with the ship's surveyor better investigating & deeper into umbilical options, hoses, wires, exhaust, fuel & fire control.

I just did an internet search for these examples. I am not suggesting any of them but to just highlight that they are out there;
https://krugersurvey.com/
https://www.outboardenginesurvey.com/
https://www.flmarinesurvey.com/
https://dieselsurveyors.com/
 
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