CLASS RACER FORUM - View Single Post - NEVER RUN oldsmobile 403.........................

Hemi Moose · 12-02-2012, 05:59 PM

403

The 455 "big block" Olds V8 was replaced in 1977 with the 403 cu in (6.6 L) "small block" V8. It used a wide 4.351 in (110.5 mm) bore, the largest ever used in a small-block V8, with the Olds small-block standard deck and 3.385 in (86.0 mm) stroke. The bore was so wide that the cylinder walls were "siamesed" (similar to another GM 400 CID small block engine) — there was no space for coolant flow between the cylinders. This sometimes led to overheating problems. Some very early 403s were painted metallic blue like the 455, but most were painted GM Corporate Blue.
The Olds 403 was used by Buick and Pontiac in addition to Oldsmobile. The engine was only produced through 1979. Output was 185 hp (138 kW) and 320 lb·ft (430 N·m).

Applications:

1977 Buick Century Estate
1977–1979 Buick Riviera
1977–1979 Buick Electra
1977–1979 Buick Estate Wagon
1977–1979 Buick LeSabre
1977 Oldsmobile Cutlass
1977 Oldsmobile Vista Cruiser
1977 Pontiac Bonneville
1977–1978 Oldsmobile Delta 88
1977–1978 Oldsmobile Toronado
1977–1979 Oldsmobile 98
1977–1979 Oldsmobile Custom Cruiser
1977–1979 Pontiac Trans Am
1977 Pontiac Grand Prix available with California Emissions Only
1977–1978 GMC Motorhome

FlyingW, perhaps you could do somemore research on those '77 to '79 Firebirds equipped with the 403 motor...or maybe start looking for one of those cars yourself, but find a real clean southern body not needing to much body work and restore it...just a thought.

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12-02-2012, 05:59 PM	#7
Hemi Moose VIP Member Join Date: Jan 2010 Posts: 2,824 Likes: 0 Liked 12 Times in 12 Posts	Re: NEVER RUN oldsmobile 403......................... 403 The 455 "big block" Olds V8 was replaced in 1977 with the 403 cu in (6.6 L) "small block" V8. It used a wide 4.351 in (110.5 mm) bore, the largest ever used in a small-block V8, with the Olds small-block standard deck and 3.385 in (86.0 mm) stroke. The bore was so wide that the cylinder walls were "siamesed" (similar to another GM 400 CID small block engine) — there was no space for coolant flow between the cylinders. This sometimes led to overheating problems. Some very early 403s were painted metallic blue like the 455, but most were painted GM Corporate Blue. The Olds 403 was used by Buick and Pontiac in addition to Oldsmobile. The engine was only produced through 1979. Output was 185 hp (138 kW) and 320 lb·ft (430 N·m). Applications: 1977 Buick Century Estate 1977–1979 Buick Riviera 1977–1979 Buick Electra 1977–1979 Buick Estate Wagon 1977–1979 Buick LeSabre 1977 Oldsmobile Cutlass 1977 Oldsmobile Vista Cruiser 1977 Pontiac Bonneville 1977–1978 Oldsmobile Delta 88 1977–1978 Oldsmobile Toronado 1977–1979 Oldsmobile 98 1977–1979 Oldsmobile Custom Cruiser 1977–1979 Pontiac Trans Am 1977 Pontiac Grand Prix available with California Emissions Only 1977–1978 GMC Motorhome FlyingW, perhaps you could do somemore research on those '77 to '79 Firebirds equipped with the 403 motor...or maybe start looking for one of those cars yourself, but find a real clean southern body not needing to much body work and restore it...just a thought. . Last edited by Hemi Moose; 12-02-2012 at 06:59 PM.