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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)

F-2 Speedy 08-06-2021 10:07 AM

I miss read you stating you ordered a moroso ? yes tig or braze all the way around the pickup tube

HawkX66 08-06-2021 10:17 AM


Originally Posted by F-2 Speedy (Post 4800564)
I miss read you stating you ordered a moroso ? yes tig or braze all the way around the pickup tube

The Moroso was just a replacement pickup. I wanted to replace the factory round press fit with one that bolts in. Just so I don't have to braze it. I don't Tig and my brazing skills between dissimilar metals leaves alot to be desired.

HawkX66 08-07-2021 06:30 PM


Originally Posted by F-2 Speedy (Post 4800564)
I miss read you stating you ordered a moroso ? yes tig or braze all the way around the pickup tube

See any need to braze the tube after I mig weld this tab on? It's pretty decent gauge so nothing is moving. I don't understand why they can't just come with a tab...
https://cimg6.ibsrv.net/gimg/www.off...4ba2cd5e3b.jpg

​​​​​​

HawkX66 08-09-2021 07:44 AM

I finished with the short block, but unfortunately my machinist ended up in the hospital before I could get my head back. I might clean up one of the heads I just picked up depending on how long he's going to be. If I had the head, I could have been on the water this coming weekend without a problem.

https://cimg8.ibsrv.net/gimg/www.off...0b219b0bb3.jpg


https://cimg8.ibsrv.net/gimg/www.off...8b1440846f.jpg
https://cimg3.ibsrv.net/gimg/www.off...3dd2bee5f9.jpg
https://cimg8.ibsrv.net/gimg/www.off...56005924ec.jpg
https://cimg3.ibsrv.net/gimg/www.off...2aa0e44ce9.jpg

F-2 Speedy 08-09-2021 08:07 AM

I like to braze the tube in place so there's no chance of it sucking air

TomZ 08-09-2021 08:41 AM

Did you end up replacing all of the intake valves (both heads)? Because contact was made across all of them, and with one severely damaged, I would assume they're all compromised.

HawkX66 08-09-2021 10:16 AM


Originally Posted by TomZ (Post 4800886)
Did you end up replacing all of the intake valves (both heads)? Because contact was made across all of them, and with one severely damaged, I would assume they're all compromised.

I'm not replacing all of them. Most of them were barely touching by the looks of the pistons. I checked them all and they seem ok. I know you can't see micro cracks etc., but with it being a hydraulic valve train I'm not as worried about it. If anything, I'm worried more about the pistons.


SB 08-09-2021 10:23 AM

Hyd lifters don’t quite work like that.

HawkX66 08-09-2021 10:46 AM


Originally Posted by SB (Post 4800901)
Hyd lifters don’t quite work like that.

Like what? Have any give? I know, but it's still not a solid lifter at least. False sense of security. I get it.

SB 08-09-2021 11:15 AM

Edit: I gave a bad example/visual in this post, lol


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