3800 wiki

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3800 Series 2/3 engine bolt sizes

Block and Timing Cover

Location	Thread Size, Length, and count
Main bearing cross-bolts	`M8x1.25 @ 50mm (6x)`
Oil pan to block	`1/4-20 @ 1“ (20x)`
Timing cover to block bolts	`5/16-18 @ 3.125” (6) - - @1.5“ (4)`
A/C bracket and RWD Motor mount bolts	`M12x1.75 @ 35mm (3)`
Starter motor	`M10x1.5 @ 50mm (1) - - @ 115mm (1)`
Battery cable to block	`M10x1.5 @ 20mm (1)`
EGR to block	`3/8-16 @ 1” (2)`
Engine bracket to block	`M10x1.5 @ 70mm (1) - - @ 75mm (1) - - M12x1.75 @ 130mm (1)`
Power steering to block (bracket)	`M8x1.25 @ 75mm (2)`
Power bracket to block ('00+)	`M8x1.25 @ 80mm (1) - - @ 25mm (2)`
Oil filter bracket to timing cover	`5/16-18 @ 1.5“ (4)`
water pump bolts	`1/4-20 @ 1.125” (4) - - 5/16-18 @ 3“ (4)`
Cam sensor bolt	`1/4-20 @ 5/8” (1)`
Flexplate to crank (auto trans cars)	`5/16-18 @ (1/2“?, 5/8”?, or 3/4“?) (8)`
Flywheel to crank (manual trans only)	`5/16-18 @ 7/8” (8)`
Pressure plate to Flywheel (manual trans only)	`M8x1.25 @ 22mm (6)`
Oil Level Sensor	`M20x1.5““\| === Heads === ^Location ^Thread Size, Length, and count\| \|Valve cover bolts\|`1/4-20 @ 5/16”x5/8” shoulder (12)`\| \|Header to head bolts\|`5/16-18 @ 1“ (9x) - - @ 1.5” (3x)`\| \|engine lift bracket to block\|`5/16-18 @ 5/8“ (2)`\| \|Intake manifold to head bolts\|`5/16-18 @ 1.125” (12)`\| \|EGR to manifolds\|`M6x1 @ 25mm (2)`\| === Intake/Supercharger === ^Location ^Thread Size, Length, and count\| \|Supercharger to LIM\|`M8x1.25 @ 40mm (9) - - @ 60mm (1) - - @ 80mm (1)`\| \|SC snout to SC\|`M8x1.25 @ 50mm (9)`\| \|Bracket to TB\|`M6x1 @ 20mm (2)`\| \|PCV Cover to SC\|`M6x1 @ 16mm (2)`\| \|Vac port to SC\|`M6x1 @ 20mm (2)`\| \|SC bypass valve to SC\|`M6x1 @ 16mm (2)`\| \|Vac Tee to SC\|`M8x1.25 @ 20mm (2)`\| \|Fuel rail to SC\|`M8x1.25 @ 10mm (1)`\| \|Thermostat cover\|`M8x1.25 @ 30mm (2)`\| === Sensors and Electronics === ^Location ^Thread Size, Length, and count\| \|Sensors to throttle body\|`M4x0.7 @ 12mm (2) - - @16mm (4)`\| \|Ignition coil to control module\|`M5x0.8 @ 45mm (6)`\| \|Cam sensor bolt\|`1/4-20 @ 5/8“ (1)`\| \|MAP sensor\|`M5x0.8 @ 30mm (2 or 4)`\| === Other Accessories === ^Location ^Thread Size, Length, and count\| \|A/C bracket\|`3/8-16 @ 2” (1)`\| \|Water pump pulley\|`M6x1 @ 12mm (4)`\| \|LIM water cover\|`M6x1 @ 20mm (2)`\| \|PCV cover\|`M8x1.25 @ 16mm (2)`\| \|Heater hose elbow brackets\|`M6x1 @ 16mm (2)`\| \|Evap Sensor bracket\|`M6x1 @ 16mm (1)`\| \|EGR heat shield\|`M6x1 @ 16mm (1)`\| \|Supercharger tensioner bracket\|`3/8-16 @ 1.5“ (1) - - @ 2” (1) - - @ 2.5“ (1)`\| \|Main belt tensioner bracket\|`3/8-16 @ 2.5” (3)`\| \|Passenger Side trans bracket\|`3/8-16 @ 3/4“ (2)`\| \|Altenator\|`M10x1.5 @ 60mm (2)`\| \|A/C compressor to bracket\|`M10x1.5 @ 60mm (3)`\| \|Lower SC idler pulley\|`M10x1.5 @ 25mm (1)''

Most, if not all of this information has been gathered from Mattstrike's post on PBC