Re-torque bolts after initial heat cycles.

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09-08-2008, 02:42 PM

graebz28

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Car: 83 Z28

Engine: 406

Transmission: T56

Axle/Gears: 9" with 4.10s

Re-torque bolts after initial heat cycles.

I know that you are supposed to re-torque bolts after the first few initial heat cycles and engine break-in, especially with aluminum heads. Do they expect you to pull the motor? How are you supposed to get to the head bolts with headers on?

I plan on doing the initial break in w/o the trans attached. Any arguments against this?

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09-08-2008, 05:38 PM

Air_Adam

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Car: '83 Z28, '07 Charger SRT8

Engine: 454ci, 6.1 Hemi

Transmission: TH350, A5

Axle/Gears: 2.73 posi, 3.06 posi

Re: Re-torque bolts after initial heat cycles.

Depends on the head gaskets used - some have to be retorqued, like the steel-shim type, and some are NOT supposed to be retorqued, like the blue FelPro gaskets.

Which ones specifically did you use?

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09-08-2008, 09:46 PM

graebz28

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Car: 83 Z28

Engine: 406

Transmission: T56

Axle/Gears: 9" with 4.10s

Re: Re-torque bolts after initial heat cycles.

Brand: GM Performance
Product Line: GM Performance Parts Composition Head Gaskets
Part Type: Head Gaskets
Part Number: NAL-10105117
Bore (in): 4.000 in.
Bore (mm): 101.600mm
Gasket Material: Composite
Compressed Thickness (in): 0.028 in.
Lock Wire: No
Quantity: Sold individually.

Head Gasket, Composite, 4.000 in. Bore, .028 in. Compressed Thickness, Chevy, 283/302/307/327/350, Each

Check to make sure this part fits your application Quality head gaskets from GM.
These GM Performance Parts head gaskets feature stainless steel faces recommended for stock and mildly modified engines. They are available for many applications and several thicknesses.

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