How do you decode a Pontiac engine number?

How do you decode a Pontiac engine number?

The date code is 4 digits. The first digit is the month, the next 2 digits are the day of the month, and the last digit is the year (6 could be 1966 or 1976). This page will help you identify the year and size of your Pontiac engine.

Where is the engine code on a Pontiac?

However, when it comes to Pontiac, this is simply the engine sequential number, generally referred to in service bulletins for updates in production. (The VIN is located on the passenger’s side front of the block, down where the timing cover and the oil pan meet.)

What is the difference between a Pontiac 400 and 455?

The significant difference internally between the 400 and the 455, as you probably know, is the diameter of the main bearing journal on the crank – the 400 being 3.000″ and the 455 being 3.250″.

How do I identify a Pontiac cylinder head?

Looking at the head from the exhaust port side, there are two drilled bosses for an A/C bracket on the passenger side (over the end exhaust port) on 4X or 6X heads. Look at the other end where there is a lone un-drilled raised machined boss. This is where there will be a stamped number.

Are Pontiac 670 heads good?

670 heads are one of the most effective heads for making power–they’re excellent heads. That said, they are the last of the closed chamber, early style heads with the big valves. They were designed for 100 octane fuel, cheaply and readily available in the ’60’s.

Are 62 Pontiac heads any good?

These heads actually make very good platforms for a good performing 400, since the compression is moderate enough for modern pump gas. The heads can be ported, upgraded with some nice stainless valves, and given a good 3- or 4-angle valve job to produce pretty respectable flow and performance.

How much horsepower does a Pontiac 400 engine have?

The 400 remained in production through the 1978 model year, with 1979 cars receiving engines produced the previous year. In basic 2-barrel form it produced 290 horsepower and 428 ft. pounds of torque in 1968. This was the engine installed in Pontiac’s “executive” line of large cars and its largest station wagon.

What size motor is a 6.6 Pontiac?

Powertrain specs

Engine type V8
Displacement 6.6 l (400 ci / 6558 cc)
Power 203 ps (200 bhp / 149 kw)
Torque 441 Nm (325 lb-ft)
Power / liter 31 ps (30 hp)

What heads came on 428?

Another thing that did differ between the 421 and 428 was that most 428s were manufactured with 2 bolt main caps. All 1967 and 1968 428s were 4 bolt main and came with chrome rocker covers and large valve performance heads but, were all fairly low production engines.

What are 6x heads?

6x heads came out in 1975 through 1979. All very low compression. 6x-4 are 8.0 compression ratio. 6x-8 are 7.6 compression ratio.

Is a Pontiac 400 a good engine?

Because of its place in Pontiac’s most brutal and outlandish muscle cars as well as fighting the good fight into the era of smog-choked, low-compression lameness, the Pontiac 400 remains one of our favorite V-8 engines.

Where can I find the Pontiac engine number?

However, these are all searchable online or can be found in Mark Allen’s booklet, Pontiac V8 Engines Factory Casting Number and Code Guide 1955–81, which is available on Amazon or eBay.

What do you need to know about a Pontiac VIN number?

Pontiac VIN decoder – Lookup and check Pontiac VIN Number and Get Vehicle History. This is the Pontiac VIN decoder. Every Pontiac car has a unique identifier code called a VIN. This number contains vital information about the car, such as its manufacturer, year of production, the plant it was produced in, type of engine, model and more.

How can I find the price of a Pontiac?

You can search Pontiac parts by VIN number. It is possible to get market price of new or used Pontiac by VIN number. Every buyer must check Pontiac car history before getting a car loan or credit. Buying a used car?

How to identify Pontiac V-8 engine blocks?

Pontiac blocks are interesting power plants that are often misunderstood and improperly identified by sellers and buyers alike. The blocks of all Pontiac V-8s from the 287 to the 455 are the same size and very close to the same weight, which can make it more difficult to identify the 11 different engine displacements produced from 1955–79.

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