540 BBC running poorly

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11-28-2018 | 11:56 AM

#171

GPM

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From: Pa

[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

11-28-2018 | 12:41 PM

#172

ancho

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From: Merritt Island, FL

[QUOTE=GPM;4661316]

Quote:

Originally Posted by ancho

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.

11-28-2018 | 01:18 PM

#173

GPM

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From: Pa

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.