Supercharged Head Gasket Trouble

JD1964

there is enough sticking out to grab on to

15 Year Member

Jun 28, 2013

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Dec 29, 2015

#21

• Dec 29, 2015

• #21

elarm1 said:

Heads back and ready to work. Machinst confirmed 2,3 7,8 lifted

Click to expand...

I'm curious. What are the physical characteristics evident on the head that allow the machinist to confirm the heads had lifted under boost?

I'm not disputing that it happened, just curious how they confirm by inspecting the heads.

 

elarm1

10 Year Member

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#22

• Dec 29, 2015

• #22

High spots on the head surface when milled and pressure testing. In looking at the head itself, there were signs of pressure escaping between cylinders as well as burn spots on the firing ring of the head gasket. There was also coolant deposits on valves and the runners on the head

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JD1964

there is enough sticking out to grab on to

15 Year Member

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Dec 29, 2015

#23

• Dec 29, 2015

• #23

How much did they need to be milled? How many thousandths?

 

elarm1

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#24

• Dec 29, 2015

• #24

.006 on bank 1 and .004 on bank 2 not much

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TOOLOW91

If you're the village idiot what's that make me?

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Dec 29, 2015

#25

• Dec 29, 2015

• #25

Hate reading stories like this glad to see you're getting it all sorted out.

 

elarm1

10 Year Member

Dec 17, 2010

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Dec 29, 2015

#26

• Dec 29, 2015

• #26

Ahhh comes with the territory. Im just glad i can undertand how to use resources like this to fix it. The rest is easy

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