500 efi rebuild?
 

Engine is 500 EFI with just over 500 hrs on it. Top end was done at 300hrs.

Am i in danger zone going another summer without a total rebuild?

IMO, You should be ok for another season. Maybe do a compression test and/or leak down.

1200 hours here not even top end done... You should be fine!

Tic Tic Tic ^^^^^

Depends what kinda life its had,I had a customer bring me a hp500 carbed motor with 480 hours on it and 5 lifters looked like this when I tore it down

2 rebuilds would be bad enough, cant imagine 3 !!!!!

I'm not saying at 1200 hours time is not ticking by the way... I know it's more than we could wish for... just did not have time over winter to take them out and rebuild... next winter's project i guess!

350 hours and....[IMG]http://i1149.photobucket.com/albums/...ps91710430.jpghttp://i1149.photobucket.com/albums/...ps357058e9.jpghttp://i1149.photobucket.com/albums/...psf9bd6b45.jpg[/IMG]

And a lot of money later.

You just made me smile with that statement. I'm 560 hrs unopened and nervous

He said top ends were done 200hrs ago. My post was assuming lifters were replaced then.

Lifters, valve springs, rockers are the killers, not a question of if...just when...1200hrs buy a lottery ticket...the pin has been removed

It's been my experience, (with the HP500), that the valve train is the weak link, Specifically, the valve springs. You can run for hours with a broken valve spring and be completely un-aware, until you have a lifter failure, much like you've seen in the pics. Valve springs seemed to have about a 50 hour life, assuming you like to "open her up" once in a while like most performance boaters tend to do.

For those of us not so mechanically inclined, what would be the going rate for a top end and a total rebuild on a 500 EFI?

Assuming of course there is not a major defect that needs replacing?

I have no prices for you, but will add, merc springs are stupid $$$$ and basicly junk, some say the setup was incorrect, I do not know, I just threw all of that crap away, went with PAC springs and their matching retainers and set the installed height

If nothing is broken for two top end refresh jobs u are looking at around 6 thousand. That was ruffle my quote before finding the problems.

I will be doing them my self next time with the help from a few friends and will save a tone of money.

every time I do something myself that I don't already have the tools for, it ends up costing me twice as much and my wife gets bent about all the cool tools I had to buy.

She also hates the amount of time I spend researching the task that I should have just hired someone that already knew how to do it RIGHT the first time.

Been married 30 years and need to stay that way, its cheaper to keep her.

Budget for 8k-9k then if you come in under you will feel good.

If you budget for 6k, and it goes over you will be pissed and drink more....lol. Always bet the over when it comes to engine work....also, budget lots of time......

That's what happened to me I was told 6 and was like ok. Then it went to 8 then 12 and was like what..... and then no more then 18 and then when I picked it up was a little over 20.....:hitfan:

Why dont you call Hugh Hefner, he has PBB#69

Uh... Did they reuse anything other than the blocks :hitfan::duel:

Top ends 6-7k min for twins and probably more like 8-9k. It really depends what you replace.

Full rebuilds, about double the cost of top ends

Mine tirnew in to a total **** storm. Not just motors turned in to drives being gone through to. Props mried all kinds of stuff. I had a real bad twisted prop shaft on the drive for the same motor with the bad lifter.

[IMG]http://i1149.photobucket.com/albums/...ps535aaf55.jpg[/IMG]

You say rockers are the killers...in all my research I haven't seen many rocker failures on blue motors in general. I saw one post from Eddie but that was from a bad batch of gold crane needle bearings.

We just did ours. I'd budget 5k a motor. In the end ours was close to that but because we found things after it was opened which is always the case. Our rebuild:

-8205 plus springs
-Manley valves
-rl931 lifters (morel 4603)
-gaskets
-mil head
-t stat housing W/ cover
-push rods
-didn't replace rockers (300 hours on them)

How does your boat run? I've got my on a donzi 39 zsc with 500efis

Hmm you could do those with out even pulling the engines.

Runs great. 62.6 on her best day. Can usually touch 60 during the summer. Will run 58 all day with a crew. I mostly don't push it and cruise 3200rpm at 36mph

When i rebuilt a 500 efi last wintrr for a customrr that had around 300 hours on it (sand got thru his flame arrestor ) there were a couple crane gold rockers w flat spots on roller tips fwiw

Just bringing back this subject up! 1227 hours by the way still running strong! Burnt 1 pint of oil in 31 hours up to now this summer!
So, for those in the engine building thing, when speaking about a "full rebuilt" on engines, what are the components to be changed and wich one you keep?
Bottom i would assume changing: bearings, pistons ans rings, plus oil pump
Top: lifter push rod rockers valve spring and valves?

Keeping crank, connecting rod and piston pins?

What other things would need to be changed? Do we need to go with crank cap bolts? Connecting rod bolts and nuts? Head bolts? Valve seats and retainer???

What else i dont know of or forget?

When mine got to 462 hrs it threw a valve. All rebuilt block up with new water pump, alternator, coupler, etc... I was at about 10 grand plus headers.