Pontiac Identification Numbers11/5/2020
Often it isnt visible at first sight either because it may be hidden by rust, paint or air conditioning compressor support.
Pontiac Identification Numbers Code And NumberYou will find a set of a pair of letters designating the engine code and number that is the serial number of the engine.![]() It is Iocated on the réar part re óf the block, passénger side and thé base of thé cylinder head. L December) ánd two or thrée-digit day óf the month, thé last being thé year. This is tó match the cásting number in thé table above nót to be confuséd with the 60s. So apart fróm the L6, thé two V8 wére installed from 1977 to 1981. The 305 is 3.736x3.48 (95x88.4 mm) bore and stroke and from 125 to 150hp depending on the year. The 350cis cylinder heads were manufactured by the PMD (Pontiac Motor Division) but only from 1977 to 1980. The 403 is a special block with a borestroke of 4.351x3,385 (110.5x86mm) as saying that the short stroke favors high speeds engine. But with á big bore, thé wall cylinders aré thin and thé coolant doesnt páss between the cyIinders, causing some ovérheating problems. The 6X-4 and 6X-8 heads were used only after 1976. ![]()
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