Oil Analysis...

[ClarkGriswold]

Anyone want to chime in on these findings?

trace water and coolent in both sides? Thoughts?

 

[Skybolt]

Have you had/done any work since the last oil sample?

But the usual suspects are the heat exchanger and/or the exhaust manifold riser gaskets. Riser gaskets and risers are the first place to look and possibly have the heat exchanger boiled and pressure tested while the anti-freeze is drained.

Unlikely would be the heads/intake, but a compression test may reveal something.

When was the last time the risers were replaced and/or gaskets replaced? That is the biggest cause for those engines to fail and need replacing.

 

[ClarkGriswold]

This was part of my pre-sale survey. The boat did NOT get an oil change last year. Risers and manifolds were done 2 years ago, per the seller. Compression test came back at 150 psi on most cylinders, 140 on one and 135 on another.

 

[Skybolt]

This was part of my pre-sale survey. The boat did NOT get an oil change last year. Risers and manifolds were done 2 years ago, per the seller. Compression test came back at 150 psi on most cylinders, 140 on one and 135 on another.

Well you can only take things at face value. The water intrusion is coming from somewhere. I would still change the riser gaskets and see what you have. If there is no proof of the work being done, then it didn't happen. You need to start somewhere.

 

[ClarkGriswold]

Well you can only take things at face value. The water intrusion is coming from somewhere. I would still change the riser gaskets and see what you have. If there is no proof of the work being done, then it didn't happen. You need to start somewhere.

Seller is going to escrow $ for the repair work. Waiting on a quote.

 

[dtfeld]

Dumb question.

Were the samples take after a good hard run? Was the oil inspected visually?

 

[ClarkGriswold]

Dumb question.

Were the samples take after a good hard run? Was the oil inspected visually?

Not a dumb question. The samples were taken at survey and I don’t think he ran her hard during said survey. The oil was also visually inspected by the surveyor and mechanic on hand for the compression testing.

 

[mrsrobinson]

I would definitely take the boat for a hard run, a good 25 to 30 minutes and take the samples again immediately once back at the dock.

The small amount of water could be normal from sitting. I had traces of potassium in an engine once, turned out to be a bad head gasket. Luckily the engine was under warranty and the head gasket was replaced under warranty.

You said the seller is going to escrow for the repair work, how do you know what needs to be repaired at this point?

Agreed with @SKybolt, no receipt means it didn't happen, I wouldn't trust the seller on their word.

 

[dtfeld]

What engine/boat combo??

A little light reading on water/oil contamination.

https://www.machinerylubrication.com/Read/192/water-contaminant-oil#:~:text=Most industrial oils such as,dissolved state than new oil.

Basically if the oil is older/used, it can absorb the amount of water your report indicates. This is in part, why engines/generator that are run on regular basis last longer. I would have the boat run at cruise RPM for a good 20-30 minutes then resample. That would at least tell you if it was a matter of old oil/sitting boat.

The K in the oil indicates possible coolant leak. See above.

The good news is the compression seems strong.

And one oil sample, even two close together doesn't mean a whole lot.

I'd proceed, with increased vigilance. Could be a good boat.

 

[fwebster]

Take a minute and completely fill out the location and boat type/power option information. Nobody here is going to haunt you, but frozen Tundra gives us no real clue of where the boat is and the type water she is expected to perform in………..doesn't seem important but you askes us to evaluate oil analyses containing water and sodium among other things. For example, sea water in an engine will show high sodium on the oil analysis if it reaches the oil pan and that may be a critical point in your negotiation

 

[ClarkGriswold]

I would definitely take the boat for a hard run, a good 25 to 30 minutes and take the samples again immediately once back at the dock.

The small amount of water could be normal from sitting. I had traces of potassium in an engine once, turned out to be a bad head gasket. Luckily the engine was under warranty and the head gasket was replaced under warranty.

You said the seller is going to escrow for the repair work, how do you know what needs to be repaired at this point?

Agreed with @SKybolt, no receipt means it didn't happen, I wouldn't trust the seller on their word.

We don’t know. So we are waiting on a quote from a mechanic as to what work needs to be done.