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4 maj 2023 · Pontiac 6.6L valve springs will have likely lost quite a bit of their action, especially if you have a 400 V8 with a high-lift camshaft. In this guide, we cover the Pontiac 400 engine. Learn about Pontiac 6.6L V8 specs, performance upgrades and common problems.
Beginning in 1955 a 2-digit engine code was stamped just under the passenger-side cylinder head. The first digit of the code indicates Manual or Automatic transmission. W = Manual transmissions, Y and Z = Automatic transmissions, and X for both. See Chart Below for actual codes.
15 sty 2017 · The block is a 400 cui 6.6 Pontiac (not 403 Olds), the casting number is 4819888 and "293642 YJ" is stamped on the machined plate in front of the right cylinder bank. I do not belive the car has been stroked but will ask the shop to check on the piston travel to make sure.
Pontiac 400 V8 Engine. The Pontiac 400 6.6 Liter engine was first introduced in 1967. This version of the Pontiac V8 engine was used in the GTO, Firebird, and the Trans-Am Firebird. The 400 was inspired by the Pontiac 389 V8 and proved to be the last Pontiac engine with closed chambered heads.
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If you know the code number, try my new head search. Chart to mill Pontiac Cylinder Heads. Pontiac made closed chambered heads until 1967. In 1967 Pontiac made some open chamber heads (i.e. 061).After 1967 the heads were open chamber heads. Exhaust Crossover Port Matchings.
How to identify your Pontiac engine. The area that is shown with the black outline is where the engine code is located. This is the front of the passenger side of the engine. An engine code list is located. <click here> This photo shows where the block casting number and date code are located.
