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#1
12-06-2016, 06:47 PM
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1973 D-port head bolt set?
Does anyone have a picture of what a 100% correct set of head bolts looks like for a 1973 Pontiac engine?
I have a schwack of head bolts, and am seeing variance from my understanding of correct-for-1970 headbolts versus what some latter year engines used. As an example, the 1972 engine I recently picked up has no less than sixx studded head bolts!? - I am thinking that someone put extra studded bolts on this engine, because to me the only studded bolts of any kind should be: 1) front drivers side head bolt - for battery cable. 2) short head bolts on drivers side for exhaust shroud. ... oh!! - I think I just thought of it!! **there were two studded head bolts per side for 1972 & prior engines for the separate rocker arm droppers - maybe those bolts were mistakenly put on the outside!!? I would like to get this straight for my brother's 1973 engine that is finally being re-assembled - my brother is insistent that we delivered the engine complete to the machinist, and never got back all the parts... Thanks in advance for sharing information and pictures!!
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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#2
12-07-2016, 10:24 PM
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Six studded bolts is correct for an AC car , and a studded water pump bolt as well for NON 80 amp alt bracket.
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
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#3
12-08-2016, 01:19 PM
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Ok, how about this;
(picture courtesy of Wallace Racing) For head bolts A through E would any of these be studded? (For my 1970 engine, I believe that bolts, B, C, D were studded for the oil drippers.) I believe that bolt F (drivers side only) would be studded - as this is where the negative battery cable attaches. I believe that at least for the drivers side bolts G & I were studded for the exhaust heat shroud. I believe that bolt H was only studded on the passenger side if the enge had air conditioning. Am I correct on all counts?
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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#4
12-08-2016, 02:25 PM
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I always thought passenger side always got stud whether AC or not?
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Mike/Illinois |
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#5
12-08-2016, 04:00 PM
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Thats true, and the DS front had a ground cable ( Visible) but as mentioned, there are some inside for oil drippers
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
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#6
12-08-2016, 04:27 PM
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In 74 I believe the center upper bolts were not studded (no oil baffles) and I think 73 was the same?
(been a long time since I did a 73)  Drawing of 77-78 bolt locations: Possibly the 73 to 77/78 same?
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#7
12-08-2016, 04:37 PM
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Seems like Lloyd may have made a diagram also for earlier heads?
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#8
12-08-2016, 04:45 PM
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Using pic posted by unruhjonny for the 77-78
Driver Side: A,B,C,D,E - non-studded F-stud, G-stud, H-non-stud, I-stud, J?-non-stud Passenger Side: A,B,C,D,E - non-studded F-non-stud, G-non-stud, H-stud, I-non-stud, J?-stud For the earlier ones with the baffle the couple in the middle as stated would have the studded bolt.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#9
12-08-2016, 07:16 PM
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thanks guys!
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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#10
12-08-2016, 07:19 PM
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Quote:
There are also brackets attached to the valve cover bolts, if you're trying to be accurate. |
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#11
12-09-2016, 01:22 PM
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Quote:
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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#12
12-12-2016, 06:26 PM
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Quote:
http://forums.maxperformanceinc.com/...ds#post3012964
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Regards, "455HO" Lloyd 2008 GMC Sierra Denali 2WD Crew, L92 6L80E, Silver w/ Ebony guts, 14.26 @ 98 
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#13
12-13-2016, 05:34 PM
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photo links dead
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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#14
12-13-2016, 06:31 PM
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Unfortunate, but not too surprising in a 9+ year old thread . . .
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Regards, "455HO" Lloyd 2008 GMC Sierra Denali 2WD Crew, L92 6L80E, Silver w/ Ebony guts, 14.26 @ 98
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#15
12-13-2016, 07:36 PM
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https://www.thepartsplaceinc.com/Pop...ID=EN9854Z.jpg
https://www.thepartsplaceinc.com/Pop...ID=EN9855Z.jpg |
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#16
12-25-2016, 03:43 PM
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Here is a working link to the head bolt comparison:
http://s223.photobucket.com/user/fas...?sort=6&page=1
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1972 Formula 400 |
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#17
12-25-2016, 03:52 PM
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Held for Ransom, please post the details for the brackets on the valve cover bolts. I am assuming these are for the wiring harness. I have several brackets and I need to know which are correct and how to orient them.
Thanks, Tom
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1972 Formula 400 |
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