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-   -   Catastrophic Engine failure. 454 gen 6 (https://www.offshoreonly.com/forums/general-q/372462-catastrophic-engine-failure-454-gen-6-a.html)

BillK 08-05-2021 01:19 PM

That looks correct :)

HawkX66 08-05-2021 01:33 PM


Originally Posted by BillK (Post 4800418)
That looks correct :)

After 10k miles rowing through the 4 SPD pretty hard I'd say I'm safe there... :ernaehrung004:
Sad part in all this is that I obviously knew better.

SB 08-05-2021 01:47 PM

You still going to degree it ?

HawkX66 08-05-2021 02:11 PM


Originally Posted by SB (Post 4800421)
You still going to degree it ?

Yep. If not just to prove that I still can lol Just a stock mag cam, but I want to see the numbers come out right before it goes back in the boat this time. Never should have put it back in with not having the numbers jive last time.

TomZ 08-05-2021 03:08 PM


Originally Posted by HawkX66 (Post 4800429)
Yep. If not just to prove that I still can lol Just a stock mag cam, but I want to see the numbers come out right before it goes back in the boat this time. Never should have put it back in with not having the numbers jive last time.

Get the factory timing set that comes with the retainer plate and be done with it. No need to degree it.

PA.WOODCHUCK 08-05-2021 04:31 PM


Originally Posted by TomZ (Post 4800338)
The 0/keyway is lining up with the alignment dot on the cam gear. There should be a corresponding dot on the crank gear that lines up with the dot on the timing gear for 0/straight up.

They way was installed, the cam was very advanced leading to intake valves smacking pistons.

Could have been a lot worse.

Dave, make sure to get the intake valves checked. It was pretty noise when running and pictures make it look like they were all touching.

**Edit - I saw you mentioned above that you had new valves.

I'm surprised it ran and made power?

HawkX66 08-06-2021 08:59 AM


Originally Posted by PA.WOODCHUCK (Post 4800450)
I'm surprised it ran and made power?

It ran beautiful (exhaust sounded great) up to 2k rpms, but didn't make enough power to even get on plane.
In the interest of being honest and not bashing a vendor who doesn't deserve it... The markings got covered with assembly lube. The timing set was perfect. I pulled the cover last night and just shook my head.
New piston and rings are in. Bearings all look good. Now to decide what to do about the oil pickup. I ordered a Moroso that gets bolted on, but it's 1/2" shorter than the one I had in there. Worse comes to worse I'll weld a tab on the old new one. I could braze it's but I'd rather have it bolted in.
One last thing, before I took the 1,3,5,7 head off, I turned the motor over to line up the timing and what a surprise, contact. I didn't have contact when I first built it because the lifters weren't pumped up. When I pulled the head it was smooth again.

https://cimg8.ibsrv.net/gimg/www.off...bd5c98e7ed.jpg
https://cimg1.ibsrv.net/gimg/www.off...22345a9408.jpg


F-2 Speedy 08-06-2021 09:12 AM

why not just run a mellings pump and pickup ? M-77 ?

TomZ 08-06-2021 09:12 AM

Glad you're getting it back together quick!

HawkX66 08-06-2021 09:47 AM


Originally Posted by F-2 Speedy (Post 4800539)
why not just run a mellings pump and pickup ? M-77 ?

I am, but you really should braze the pick up on. The pickup is just a press fit unless you're talking about something else I'm not picturing.


Originally Posted by TomZ (Post 4800540)
Glad you're getting it back together quick!

Thanks. Hopefully the humidity stays reasonable for a while like it is right now. Makes working on the boat so much nicer not having to bathe the parts in sweat.
I need to throw a new lower shift cable in before I drop the motor back in. Other than that this won't be bad to finish up.


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