Dead cylinder??

[bomar76]

Re: Dead cylinder??

There is no reason for all the hand wringing and speculation...
if he did indeed verify there is no spark to #6 there is an ignition problem.
If there is zero compression in #6 then the hard needs to come off.
And the odds of no spark in #6 AND no compression in #6 happening simultaneously are impossibly remote.
Most likely there IS spark going to #6, and the problem is a frozen valve or FUBARed piston.
And as I said, pull the head and get on with it.

 

[CharlieB]

Re: Dead cylinder??

Have the boat in for new cables and such and the mechanic just called ..........

I just put a new motor in last season and closed cooling system.
The carb is a marine 4bbl edelbrock. The motor is a 5.7l vortec.
The boat listed below.

I have to ask a few questions,

Who put this motor in, When, was it new, rebuilt, warrantied?
Did it run on all eight cyl's?

Was this a marine engine or a car motor?

Me thinks we are not getting quite the whole story yet.

 

[RCSConstruction]

Re: Dead cylinder??

I have to ask a few questions,

Who put this motor in, When, was it new, rebuilt, warrantied?
Did it run on all eight cyl's?

Was this a marine engine or a car motor?

Me thinks we are not getting quite the whole story yet.

Bought a long block from RapidO marine. I bolted everything on and installed it. Had it in a shop two weeks after I put it in for a valve adjustment because they were clacking. Verified my installation, all was well.
I probably only ran 5-6 full tanks of gas in it last season before I parked her for the winter. I drained the exhaust, fogged the cylinders,changed oil, etccccccc..
It idles the same way it has when I first got it. Always seemed a little rich, I was always rechecking timing and trying to dial in the carb.
Have a 22p 4 blade prop and was getting 4100 rpm's and 4600 rpms with my 20 pitch.
Boat always started right up no problems, burned NO oil.. This was a complete shock to me. The motor doesn't shake or idle erratic, the exhaust didn't have any pop's or miss sounds.
Again, I am totally floored that I have no compression.
I had a blazer once that stuck an exhaust valve and it was easy to "hear" and "feel" there was something wrong.
Heads coming off today, I'll update.
Wondering if I should even try calling Raul at rapido for warr. issues?

 

[Tail_Gunner]

Re: Dead cylinder??

Long time no see RC, i remeber you posting those speed and prop results. As you know we have the same boat and drive, However mine is a 4.3gi doing about 215 and you have that big v-8 doing what 300+.

The 4.3 can turn that 22p four blade to 4500 and a 20 to the rev limiter, unless your gearing is taller than 1.66 it would seem that cylinder has been dead for quite some time.

Just for clarity he has my old prop on his boat which is 1 yr older than mine and they are identical

Sorry to hear from you in this manner but nice to see ya again....i always thougth you would be able to get 60+ out of that engine...

 

[TilliamWe]

Re: Dead cylinder??

"Have a 22p 4 blade prop and was getting 4100 rpm's "

Ding Ding Ding, there is your problem.

 

[erikgreen]

Re: Dead cylinder??

Bought a long block from RapidO marine.
Heads coming off today, I'll update.
Wondering if I should even try calling Raul at rapido for warr. issues?

I'd send him an email with a heads-up, and ask if there's anything he'd like you to do if it turns out to be a warranty issue - like taking pictures, saving old parts, etc.

The only issue I could see them having with it might be the valve adjustment you mention.. did you at any time adjust the valves yourself? If you haven't done it before or made a mistake, overtightening the valves could have made one hit a piston, bending the stem or causing other issues.

No way to tell until you get it apart though. Please do post updates (with pics if possible) to let us know how it comes out.

Erik

 

[QC]

Re: Dead cylinder??

Ding ding ding ^^^^^^

 

[RCSConstruction]

Re: Dead cylinder??

Sooo... I should send TG the bill for selling me the wrong prop???
I think your right TG, It may have been this way since day one. I spent so much time trying to break it in I never really had a chance to "get on it" till the end of the season.
I just called and they haven't even got to it yet. I know bitching about boat shops makes some upset but jeezz, why does it seem that these boat shops are working on 4 different boats at the same time? You can't call a guy up and tell him his baby is broken and leave it at that!!
Anyways... Said they will "get to it" next week.
It makes a little upset and if I don't find something to do with my time today I may get myself so riled up I may go pick it up and pull the dang head myself.
Thanks for all the great input fellas

 

[RCSConstruction]

Re: Dead cylinder??

I never touched the internals of the motor. After I finally installed the motor I figured out I am just getting too damn old to be wrenching all weekend and have had shops taking care of most everything.

 

[QC]

Re: Dead cylinder??

why does it seem that these boat shops are working on 4 different boats at the same time?

Because everybody's boat broke sitting on the trailer over the winter . . .

Jeez dude, get out a calendar

 

[RCSConstruction]

Re: Dead cylinder??

Because everybody's boat broke sitting on the trailer over the winter . . .

Jeez dude, get out a calendar

Yeah.. I swore I wasn't going to wait till the last minute like last year and I figured I only needed a shift cable.....

 

[TilliamWe]

Re: Dead cylinder??

You need to let Rapido and the shop that adjusted the valves know right now what is going on. But I'll give you a hint, Rapido already has grounds to disregard your warranty. You modified the product (valve adjustment) and operated it with a prop that didn't allow the motor to operate at its WOT RPM range. I think you are in for a bad time, sorry.

 

[RCSConstruction]

Re: Dead cylinder??

You need to let Rapido and the shop that adjusted the valves know right now what is going on. But I'll give you a hint, Rapido already has grounds to disregard your warranty. You modified the product (valve adjustment) and operated it with a prop that didn't allow the motor to operate at its WOT RPM range. I think you are in for a bad time, sorry.

That prop should be just right. Do the math. 1.66 gear ratio sx drive and a conservative hp rating of 275hp 19' boat.plenty of power to twist a 22p.
The valves were adjusted by a "real" boat repair facility. Was I supposed to take the motor out and ship it to Florida?
I am not even bothering with warranty issues. I have a brand new GM head ready to go on if needed. No blame game here, just disappointment.

edit--
Also wanted to add that I believe it is a stuck valve. Probably due to inadequate tolerances from the machining. This boat runs/sounds/feels just like it has from day one. That's why it's a big shock to me. Also this boat has only seen WOT maybe 4-5 times.

 

[TilliamWe]

Re: Dead cylinder??

I don't care what math you show me. When you say that the 4 blade prop turned 4100 rpm at WOT that is too low, period. If you ran it that way very long you damaged the valves.
Now it is possible that the shop did adjust a valve too tight and it is bent. In that case, they need to make it right.
As far as shipping it to Rapido for valve adjustment, of course I don't think you should have done that. But did you even bother to call them at that point and express your disappointment in their product? Seems like a call stating that their valve adjustment was rattling may have gotten you something from them at that point. Or at least a paper trail to follow back to them in the event anything went wrong.
Please keep us posted as to what is actually wrong with the engine. My vote is on tulipped valves.

 

[RCSConstruction]

Re: Dead cylinder??

As far as shipping it to Rapido for valve adjustment, of course I don't think you should have done that. But did you even bother to call them at that point and express your disappointment in their product? Seems like a call stating that their valve adjustment was rattling may have gotten you something from them at that point. Or at least a paper trail to follow back to them in the event anything went wrong.
Please keep us posted as to what is actually wrong with the engine. My vote is on tulipped valves.

He was called, said it was normal to have to readjust them (i called BS) but I wasn't going to argue about a 100.00 valve adjustment with him.
I will have pics and news up as soon as I find out.

 

[FreeBeeTony]

Re: Dead cylinder??

I really hope this is not a Rapido issue.

 

[Coors]

Re: Dead cylinder??

If it is, it started out as a simple "didn't use new self-locking nuts on the rockers"
imho

 

[Coors]

Re: Dead cylinder??

oil pressure ok?

 

[MikDee]

Re: Dead cylinder??

I've seen something like this before, a few yrs ago at the marina, it happened to be a big block chevy then, no suction?, no compression?, a dry dead cylinder, just a broken valve spring, a simple fix.

 

[Tail_Gunner]

Re: Dead cylinder??

That prop should be just right. Do the math. 1.66 gear ratio sx drive and a conservative hp rating of 275hp 19' boat.plenty of power to twist a 22p.
The valves were adjusted by a "real" boat repair facility. Was I supposed to take the motor out and ship it to Florida?
I am not even bothering with warranty issues. I have a brand new GM head ready to go on if needed. No blame game here, just disappointment.

edit--
Also wanted to add that I believe it is a stuck valve. Probably due to inadequate tolerances from the machining. This boat runs/sounds/feels just like it has from day one. That's why it's a big shock to me. Also this boat has only seen WOT maybe 4-5 times.

Sometime's you either have to laugh or cry...keep laughing RCS you dead on in your opinion's...Now if Don or Bondo chime in, well take heed it will just add to or explain the final outcome...

Umm by the way refund's are welcomed with open arm's.....Ill take the 22p 4blade and the 5.7 vortec with the 4 barrell and all....Ohh and i will give you the 4.3gi and the 20p 4 blade chit it does 56 what more do ya need....

What's your addr i lost it...eargly waitng your reply....