Pontiac V8 engine
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<td style="width: 81px">'''1969'''</td> | <td style="width: 81px">'''1969'''</td> | ||
<td style="width: 48px">303'''**'''</td> | <td style="width: 48px">303'''**'''</td> | ||
| − | <td style="width: 54px">4. | + | <td style="width: 54px">4.120</td> |
<td style="width: 60px">2.84</td> | <td style="width: 60px">2.84</td> | ||
| − | <td style="width: 49px"> | + | <td style="width: 49px">2.50</td> |
<td style="width: 53px">2.25</td></tr> | <td style="width: 53px">2.25</td></tr> | ||
<tr bgcolor="#F1F1F1"> | <tr bgcolor="#F1F1F1"> | ||
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<td style="width: 60px">3.00</td> | <td style="width: 60px">3.00</td> | ||
<td style="width: 49px">3.00</td> | <td style="width: 49px">3.00</td> | ||
| − | <td style="width: 53px">2. | + | <td style="width: 53px">2.00</td></tr> |
<tr> | <tr> | ||
<td style="width: 81px">'''1980-'81'''</td> | <td style="width: 81px">'''1980-'81'''</td> | ||
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<td style="width: 60px">3.00</td> | <td style="width: 60px">3.00</td> | ||
<td style="width: 49px">3.00</td> | <td style="width: 49px">3.00</td> | ||
| − | <td style="width: 53px">2. | + | <td style="width: 53px">2.00</td></tr> |
</table> | </table> | ||
'''NOTES:'''<br> | '''NOTES:'''<br> | ||
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'''***'''The 350 engine actually displaced 354 ci. | '''***'''The 350 engine actually displaced 354 ci. | ||
<br> | <br> | ||
| + | |||
==Pontiac engines by displacement== | ==Pontiac engines by displacement== | ||
<table class="style119" style="width: 620px" border="2" cellpadding="2" cellspacing="0"> | <table class="style119" style="width: 620px" border="2" cellpadding="2" cellspacing="0"> | ||
| Line 150: | Line 151: | ||
<td style="width: 60px">3.00</td> | <td style="width: 60px">3.00</td> | ||
<td style="width: 46px">3.00</td> | <td style="width: 46px">3.00</td> | ||
| − | <td style="width: 26px">2. | + | <td style="width: 26px">2.00</td></tr> |
<tr bgcolor="#F1F1F1"> | <tr bgcolor="#F1F1F1"> | ||
<td style="width: 38px">'''287'''</td> | <td style="width: 38px">'''287'''</td> | ||
| Line 164: | Line 165: | ||
<td style="width: 60px">3.00</td> | <td style="width: 60px">3.00</td> | ||
<td style="width: 46px">3.00</td> | <td style="width: 46px">3.00</td> | ||
| − | <td style="width: 26px">2. | + | <td style="width: 26px">2.00</td></tr> |
<tr bgcolor="#F1F1F1"> | <tr bgcolor="#F1F1F1"> | ||
<td style="width: 38px">'''303**'''</td> | <td style="width: 38px">'''303**'''</td> | ||
<td style="width: 62px">1969</td> | <td style="width: 62px">1969</td> | ||
| − | <td>4. | + | <td>4.120</td> |
<td style="width: 60px">2.84</td> | <td style="width: 60px">2.84</td> | ||
| − | <td style="width: 46px"> | + | <td style="width: 46px">2.50</td> |
<td style="width: 26px">2.25</td></tr> | <td style="width: 26px">2.25</td></tr> | ||
<tr> | <tr> | ||
| Line 288: | Line 289: | ||
<td >3.00</td> | <td >3.00</td> | ||
<td >3.00</td> | <td >3.00</td> | ||
| − | <td >2. | + | <td >2.00</td></tr> |
<tr bgcolor="#F1F1F1" align="center" valign="bottom"> | <tr bgcolor="#F1F1F1" align="center" valign="bottom"> | ||
<td>'''287'''</td> | <td>'''287'''</td> | ||
| Line 300: | Line 301: | ||
<td >3.00</td> | <td >3.00</td> | ||
<td >3.00</td> | <td >3.00</td> | ||
| − | <td >2. | + | <td >2.00</td></tr> |
<tr bgcolor="#F1F1F1" align="center" valign="bottom"> | <tr bgcolor="#F1F1F1" align="center" valign="bottom"> | ||
<td>'''303**'''</td> | <td>'''303**'''</td> | ||
| − | <td >4. | + | <td >4.120</td> |
<td >2.840</td> | <td >2.840</td> | ||
| − | <td > | + | <td >2.50</td> |
<td >2.25</td></tr> | <td >2.25</td></tr> | ||
<tr align="center" valign="bottom"> | <tr align="center" valign="bottom"> | ||
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In 1967 the 400 4bbl engines went to new valve angle and placement and all Pontiac V-8's 1968 and newer. Newer valves don't line up correctly with the 67 2bbl, any 326 or all 1966-back piston valve reliefs (and obviously vice-versa), the correct piston has to be used if any sort of aftermarket high lift cam is used, or else there may be destructive valve to piston interference. There are 8-valve relief pistons available to fit all the valve angle differences used through the years on Pontiac 400 engines. While these pistons will get the job done, from a high performance standpoint they are not desirable partially due to the lower compression. | In 1967 the 400 4bbl engines went to new valve angle and placement and all Pontiac V-8's 1968 and newer. Newer valves don't line up correctly with the 67 2bbl, any 326 or all 1966-back piston valve reliefs (and obviously vice-versa), the correct piston has to be used if any sort of aftermarket high lift cam is used, or else there may be destructive valve to piston interference. There are 8-valve relief pistons available to fit all the valve angle differences used through the years on Pontiac 400 engines. While these pistons will get the job done, from a high performance standpoint they are not desirable partially due to the lower compression. | ||
| − | |||
| − | |||
Pontiac went to an advertised 7.6:1 compression in about 1975, due in part to the design of the top of the pistons. Pontiac pistons from the low compression years have a 45 degree machined outer edge of the piston top. | Pontiac went to an advertised 7.6:1 compression in about 1975, due in part to the design of the top of the pistons. Pontiac pistons from the low compression years have a 45 degree machined outer edge of the piston top. | ||
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The same timing chain cover was used for both '64 and '65 and had just a simple pointer. These were cast with number '''9773371'''. The timing cover used on '66 and '67 employed a small timing scale marked -4-0-+6 and is otherwise identified as casting #'''9783130'''. The '68, '69 and '70 timing covers look very similar with timing marks of 0-6-12 degrees BTDC and accommodated the large diameter damper. The '68 timing cover casting number is '''9790347''' and uses the 8-bolt water pump. The '69-'70 timing cover casting number is '''9796346''' and uses the improved 11-bolt pump. For '71-up the timing cover timing tab is marked from 4 degrees ATDC to 12 degrees BTDC and is graduated all the way to 16 degrees BTDC. As compression ratios were lowered to 8:1 and less there became a need for increased initial advance. Casting number for this cover is '''482883'''. If you need to order a water pump the Federal Mogul part numbers are: '64-'68 is FP1388N, early '69 is FP1409N and late '69-on is FP1423. | The same timing chain cover was used for both '64 and '65 and had just a simple pointer. These were cast with number '''9773371'''. The timing cover used on '66 and '67 employed a small timing scale marked -4-0-+6 and is otherwise identified as casting #'''9783130'''. The '68, '69 and '70 timing covers look very similar with timing marks of 0-6-12 degrees BTDC and accommodated the large diameter damper. The '68 timing cover casting number is '''9790347''' and uses the 8-bolt water pump. The '69-'70 timing cover casting number is '''9796346''' and uses the improved 11-bolt pump. For '71-up the timing cover timing tab is marked from 4 degrees ATDC to 12 degrees BTDC and is graduated all the way to 16 degrees BTDC. As compression ratios were lowered to 8:1 and less there became a need for increased initial advance. Casting number for this cover is '''482883'''. If you need to order a water pump the Federal Mogul part numbers are: '64-'68 is FP1388N, early '69 is FP1409N and late '69-on is FP1423. | ||
</blockquote> | </blockquote> | ||
| + | |||
| + | Pontiac Timing Cover Indentification (and Parts) from Butler Performance: | ||
| + | http://butlerperformance.com/n-13416-pontiac-timing-cover-identification.html | ||
| + | |||
;[[Pontiac V8 engine #Parts interchangeability|Return to Parts interchangeability]] | ;[[Pontiac V8 engine #Parts interchangeability|Return to Parts interchangeability]] | ||
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===Water pump=== | ===Water pump=== | ||
There were two basic water pump designs used between 1964 and the end of production: an 8-bolt (up to '68-early '69) and an 11-bolt pump used after the 8-bolt pump. | There were two basic water pump designs used between 1964 and the end of production: an 8-bolt (up to '68-early '69) and an 11-bolt pump used after the 8-bolt pump. | ||
| + | 1969-1976 with Timing Pointer, 1977-up without Timing Pointer. | ||
| + | |||
| + | 1955-1963: 4-bolt water pump | ||
If the engine seems to be overheating, first be sure the temp gauge is reading correctly. Use a temporary mechanical gauge to check it. Then check the ignition timing to be sure it's not retarded. | If the engine seems to be overheating, first be sure the temp gauge is reading correctly. Use a temporary mechanical gauge to check it. Then check the ignition timing to be sure it's not retarded. | ||
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*[http://www.highperformancepontiac.com/techarticles/index.html Various tech articles], from High Performance Pontiac | *[http://www.highperformancepontiac.com/techarticles/index.html Various tech articles], from High Performance Pontiac | ||
*[http://www.jalopyjournal.com/forum/showthread.php?t=316668 Pontiac Hemi] HAMB thread | *[http://www.jalopyjournal.com/forum/showthread.php?t=316668 Pontiac Hemi] HAMB thread | ||
| + | *Passenger-Side-Only Lifter Clatter (HotRod Magazine): http://butlerperformance.com/files/images/oil-galley-plug.jpg | ||
[[File:7K3 Pont HEADS DRILLED FOR HEADERS 2.jpg|thumb|300px|left|7K3 heads drilled for headers. [http://www.spottsperformance.com/ Spots Performance] also sells "L" brackets for heads like these that don't have the pad.]] | [[File:7K3 Pont HEADS DRILLED FOR HEADERS 2.jpg|thumb|300px|left|7K3 heads drilled for headers. [http://www.spottsperformance.com/ Spots Performance] also sells "L" brackets for heads like these that don't have the pad.]] | ||
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