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Old 09-07-2010, 10:48 AM
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bolt swaping, pontiac 350 to a 455

Ive got everything together to build my 455, being that 90% of the bolts can be interchanged would i be hurting myself to reuse them on my new motor?

the 350 only has 100k original miles and is VERY clean under the hood.
I know bolt kits are between60-100$ for a full engine kit, but they dont come with head and main cap bolts which are 100$ alone.

Is it safe to reuse the head bolts and the Main cap bolts from the 455?

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Old 09-07-2010, 02:38 PM
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id reuse the smaller bolts that aren't under alot of stress. ie. oil pan/intake. i wouldn't recommend using the head bolts over. snapping a weak head bolt while torquing it in the block will cause you more of a pain then just springing for new blots
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Old 09-08-2010, 01:36 PM
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Quote:
Originally Posted by AndersonRacing44
Ive got everything together to build my 455, being that 90% of the bolts can be interchanged would i be hurting myself to reuse them on my new motor?

the 350 only has 100k original miles and is VERY clean under the hood.
I know bolt kits are between60-100$ for a full engine kit, but they dont come with head and main cap bolts which are 100$ alone.

Is it safe to reuse the head bolts and the Main cap bolts from the 455?
If you want MY opinion, I'd reuse the 350 bolts on a 455 (all except rod bolts and nuts, obviously) or vice versa w/o hesitation. Main, head, intake, etc. I would (and HAVE) reused all of them.

Pontiac Torque Specs
Damper Bolt 160 ft/lb


Camshaft Sprocket-to-Camshaft Bolt
40 ft. lbs.

Camshaft Thrust Plate Bolts
20 ft. lbs.

Cylinder Head Bolts
1977 301 cu. in. Engine
85 ft. lbs.

1977 350 cu. in. Engine
100 ft. lbs.

Don't reuse these at the lower 400 cid torque spec, if the 350 you are using is a '77.

All Others
95 ft. lbs.

Exhaust Manifold Bolts
1970-76
30 ft. lbs.

1977 and Later
40 ft. lbs.

Flywheel/Driveplate Bolts
95 ft. lbs.

Intake Manifold Bolts
1970-76
40 ft. lbs.

1977 and Later
35 ft. lbs.

Main Bearing Cap Bolts
Caps #1 Through #4
301 cu. in. Engine
7/16" Bolts
70 ft. lbs.

1/2" Bolts
100 ft. lbs.

All Other Engines
100 ft. lbs.

Rear Cap ( #5 )
301 cu. in. Engine
100 ft. lbs.

All Others
120 ft. lbs.

Oil Pan Bolts
12 ft. lbs.

Rocker Arm Cover Bolts
6 ft. lbs.

Rocker Arm Nuts- non adjustable bottleneck studs only
20 ft. lbs.

Rod Bearing Nuts
1970-76
43 ft. lbs.

301 cu. in Only
30 ft. lbs.

All Others
40 ft. lbs.

Thermostat Housing-to-Intake Manifold Bolts/Stud Bolts
30 ft. lbs.

Timing Chain Cover Bolts/Nuts
30 ft. lbs.

Timing Chain Cover-to-Intake Manifold Bolt
15 ft. lbs.

Vibration Damper-to-Crankshaft Bolt
160 ft. lbs.

Last edited by cobalt327; 09-08-2010 at 01:43 PM.
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