540 BBC running poorly
11-21-2018, 11:40 AM
#161
Registered
So your whole boat is at this place ? Or just the engine ?
I do not know whom they are so does anyone else have a dealing with them up here ?
So since the inspection really did pin point any of the issues that you have - I was thinking how is the rest of the systems on your boat ?? Maybe before you sink a alot of money into this project get a second opinion about the other systems ---- transom - stringers - transom assembly -- steering - drives - and so on. You know since that certified SAMS inspector MISSED everything on the engine side and fuel side as well ---- so who knows I am sure he missed other things as well. I would have other things looked at for a piece of mind before you spend a ton on the engines.
I do not know whom they are so does anyone else have a dealing with them up here ?
So since the inspection really did pin point any of the issues that you have - I was thinking how is the rest of the systems on your boat ?? Maybe before you sink a alot of money into this project get a second opinion about the other systems ---- transom - stringers - transom assembly -- steering - drives - and so on. You know since that certified SAMS inspector MISSED everything on the engine side and fuel side as well ---- so who knows I am sure he missed other things as well. I would have other things looked at for a piece of mind before you spend a ton on the engines.
Where it is at the wood in the transom and stringer can be checked,,,,,,,,,,,,,,,, believe me.
As for the rest of the boat,,,,IDK what shape it is in. It sucks but at this point what do you do? One way I look at it is when it gets done it should be solid, he will know what he has and the only way to really get money back is use the piss out of it.
And if he starts hanging with our group he will!
Ancho, if you want me to delete I will.
11-22-2018, 09:34 PM
#165
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iTrader: (7)
50-100 hrs plenty. Many once, twice a season. There are some variables such as how aggressive lobe profile, Open and closed seat pressures and how hard you run your engine/engines. A concern with new build or any build at that is the seats can get driven down especially with aluminum heads. With that said good idea to ck after a couple hours a hard run time with new heads. I've found the times I check for ruiteen maintenance lash is fine and that's with a very aggressive lobe but stable valvetrain.
11-28-2018, 08:53 AM
#166
Registered
Thread Starter
Heads off. multiple exhaust valve guides worn, but are replaceable on these Dart heads so all will be replaced. Valves are not marine spec, are automotive spec, and will be replaced with appropriate marine spec. Valve springs weaker than they should be. No evidence of significant lower end damage but prior builder did not properly hone the cylinders and so the ring seal is not good. So, bottom ends will be disassembled, fresh hone, new rings. Pistons are in good shape and will be sent out for teflon coating.
11-28-2018, 09:17 AM
#167
Registered
Heads off. multiple exhaust valve guides worn, but are replaceable on these Dart heads so all will be replaced. Valves are not marine spec, are automotive spec, and will be replaced with appropriate marine spec. Valve springs weaker than they should be. No evidence of significant lower end damage but prior builder did not properly hone the cylinders and so the ring seal is not good. So, bottom ends will be disassembled, fresh hone, new rings. Pistons are in good shape and will be sent out for teflon coating.
11-28-2018, 09:30 AM
#168
Registered
Thread Starter
Builder was White Performance and Machine White Performance and Machine - in Tennessee.
Haven't decided what to do about the cams yet. I think going to hydraulic makes sense but we have not had the conversation in any detail yet.
Haven't decided what to do about the cams yet. I think going to hydraulic makes sense but we have not had the conversation in any detail yet.
