OK, So by now everyone knows my lil Moo lost all oil pressure right after launching on Saturday. I had to beleive a bad guage or sender, so I took a couple quick blasts and some mild rattling (Lifters and piston slap probably), so she was beached and pulled out immediately.

So, at home, I pull the motor last night, and curiousity got the best of me so I drop the pan.....everything is where it's supposed to be. Pickup tube is fine. (Theory #3 failed). Pulled the pump, shaft is ok (Theory #1 failed). pulled the pump apart, it's fine (theory  #4 failed). Pulled the dizzy, nope, its not sheared or stripped where it engages the shaft either (Theory #3 shot down).

It's not a bad guage or sender, it was NOT pumping oil as the hoses to the remote filter dealio were bone dry when I pulled them loose. Everything appears normal in there, just as I had built it. No noticeable play in the rods, no trash in the pan and the oil looked very clean coming out. gonnna do the coffee filter thing on some of the oil here a lil later.   











Ray

Spun Bearing!?!?

blue = heat

I guess I don't see whats wrong with the oil pump? Brand new with 35 hours of time on it. Seems tight. maybe just the pic?

Ray

So I already asked GT, might as well throw it out there for the rest. When this thing goes back in, I wanna do 4 point replacing the three point on it. Took me an hour and a half to get the engine out, and I swear 45 minutes of that was focking around prying out the driveline.

Anyone got the tools to loan to set it up properly? Or do I need to make my own? I got a couple blocks here and a crank I can toss into one for mock up purposes. Don't see the need for rails on a 1/4 stringer boat, just a std 4 point mount that I have here.

Did you check the pressure relief spring in the pump? 

 I hope that wasn't a milodon marine pan on a 460, I had the old "lost oil pressure with one".   

 But then again it would return pressure when the rpms dropped barring catastrophic engine damage prior.

So, I'm hoping for the spring broken

lifter out of hole

I was thinking the same...Wouldn't take much and will still run (but make lifter like noises  )

GT

And it got worse. Minute I pulled the intake I knew I was in trouble. other than the bent pushrod ( #3 again) and broken pushrod and rocker, same cylinder, cam looks like it's been left out in the rain for months and months???    Yeah, 4 rod bearings are toast, Got some decisions to make now. Stroker? Obviously a larger cam is in order, maybe I'll fall in line with you 'uns and go roller this time. No valves are bent, pistons are good (Of course, got two more sets of the same ones here, THEY'D Survive.....  ), bores look good, a little hone maybe.

I'm guessing I had a residual intake manifold leak dripping into the engine for the rides home and weeks at a time in the garage. Reversion, possibly. This is not from a part failure, this is all started from a progessive problem with water in the engine I beleive.

But this time I think I have a better idea what is needed to be done differently on a Hot Rod Marine engine. My dumb ass put this together, and amazingly, has run and performed flawlessly until the Tom Papp deal in January. Not too shabby really for a hack that hasn't built an engine in 20 years. And at least I didn't do as much damage as Rivertard did, 







Ray

Yeah, I have a theory on that Ralph. It's a 305 degree cam. It's quite possible I didn't have enough spring pressure to keep the lifters on the lobes on the down side....maybe. I bought them all together, but it IS a possibility the lifters were "flying" over the down side of the cam.

The rust is BAD, wiped it down with an oily rag. Once I get over my disgust I'll take a picture of it. Very pitted.

Ray

PS, there was NO water in the oil or anywhere I could see either. So it's not a development over this week.

Well that just plain sucks Ray! Does this mean that you found Waldo? Get busy on the rebuild......

Another observation..... that valley sure looks DRY

I wiped it down with shop towels before the pic, Mark. I was looking for water........   

Good eye though! But there really wasn't much oil laying around up there either......any ideas on that?

Ray

Well that just plain sucks Ray! Does this mean that you found Waldo? Get busy on the rebuild......

Yeah it does, lol. Found why the oil pressure dropped, but I think we're investigating what caused THAT. The rust seems to be the issue here and most likely the cause. Need to figure out where and why THAT happened to fully answer the question.

I am wondering how well your rockers were adjusted, or torqued It's the rust thats getting me, hell even on the lifters

Yeah, I'm bad on that, but I had adjusted for .022" lash before the Elsinore trip in January. And even then, only 2 or three needed a lil "tweak" . Boats been out twice since. There is no torque on the rockers, only on the allen screws locking the adjusting nuts on the rollers (Solid lifters). I beleive it's 35 ft lbs, without looking.

Perplexing huh?  Yeah, the rust, Ralph even saw it run and take a couple full throttle blasts upriver a few hundred yards! Got me as well! Did NOT expect this.

Ray

Got you thinking too huh Dave? Welcome to my world. If it can happen, I'll be the one to find out how.......

Ray

Nope Ray..... you Got multiple  issues  here, just learned to be careful as voicing my opinion on this site.

**************feel free to pm or call************

562-943-5679.

LOL, Actually, I was gonna call ya as soon as I saw all this. Then the beer drinking started. Didn't wanna bug ya on a weekend. I'll call ya in the morning. I kinda got an idea what you're going to tell me, and I'm sure I dun wanna hear that either, lol.   

Ray