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-   -   540 BBC running poorly (https://www.offshoreonly.com/forums/general-q/357283-540-bbc-running-poorly.html)

GPM 11-28-2018 11:56 AM
[QUOTE=ancho;4661269]Heads off. multiple exhaust valve guides worn, but are replaceable on these Dart heads so all will be replaced.

Just curious, are these older Pro 1s

ancho 11-28-2018 12:41 PM
[QUOTE=GPM;4661316]
Originally Posted by ancho (Post 4661269)
Heads off. multiple exhaust valve guides worn, but are replaceable on these Dart heads so all will be replaced.

Just curious, are these older Pro 1s
No idea. I saw they have an "iron eagle" debossed in the area between the valvesprings.

GPM 11-28-2018 01:18 PM
That's a steel head, Pro 1s are aluminum. Dart had a problem a while back where they weren't machining the valves and rocker stands on the same angle, they would eat guides.


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