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#1
11-13-2010, 01:30 PM
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Blown head gasket and broken lifter
check this out........seems like a very suttle gasket leak leak???
also found a lifter with a broken retainer on the push rod pocket......hmmmmm opinions on damage? thanks
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#2
11-13-2010, 01:39 PM
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also had water/sludge in the #7 intake port and intake plenum.....
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#3
11-13-2010, 01:53 PM
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Mike was the lifter from #7 also?
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74  2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#4
11-13-2010, 02:13 PM
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no........ #3 intake
the pushrod was still seated properly eve tho the retainer was broken...found it when i pulled the pushrods.....the plunger came out and fell next to the lifter bore..
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#5
11-13-2010, 02:15 PM
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forgot to mention......the pics of the gasket and head are of #7 cylinder.....
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#6
11-13-2010, 04:40 PM
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more bad news......decided to pull the other head......#6 cylinder
How long could I get by running with this crack???
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#7
11-13-2010, 04:46 PM
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Cam to big causing the Rich-carbon appearance?
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#8
11-13-2010, 05:10 PM
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Cracks in cylinder walls usually aren't the precise. Looks more like a ring or contamination cut. Most HD operation or lots of miles results in cylinder scratches.
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#9
11-13-2010, 05:21 PM
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[QUOTE=PONTIAC DUDE;4151804]Cracks in cylinder walls usually aren't the precise. Looks more like a ring or contamination cut. Most HD operation or lots of miles results in cylinder scratches.[/QUO
I thought it was odd being that uniform......I can feel it with a fingernail....was not having an issue with that cylinder...hard to tell a scratch from a crack...
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#10
11-13-2010, 05:49 PM
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Quote:
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#11
11-13-2010, 06:08 PM
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Have to agree A crack usually will be odd looking like above that is a perfect line, meaning something got caught in the ring? what made u decide to pull the one head car running different? Looks like a good reason for the KRE's now!
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#12
11-13-2010, 06:25 PM
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Quote:
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#13
11-13-2010, 07:48 PM
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Let me know if you need an extra set of hands when you put it back in.
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#14
11-13-2010, 08:28 PM
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x2
ya mike i am just around the corner to but what do i know =)
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1978 ,t/a 3660# 455 2010 / 1/8 7.86 1/4 12.40 @ 109,19 http://www.youtube.com/watch?v=6PaHbLnszS0 http://www.youtube.com/watch?v=XMxhM...eature=related 12.01@109 http://www.youtube.com/watch?v=MC-dganA2jQ 100 shot 11.78. A,ll new head cam combo 96 ported bye Mike Chell!! Comp cam yes the 284 XE. Firsthand outing of the street 7.69 1/8 12.15 109.47 hot and humid.not hooking. 1.73 60. |
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#15
11-13-2010, 08:37 PM
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thanks guy's........I appreciate the offers.....I am planning on replacing the head gaskets,broken lifter and slapping it back together ......
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#16
11-13-2010, 10:14 PM
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Sorry guys but ive got to ask something please, look at his water jacket holes, don,t they all look about clogged?? Maybe overheating caused this problem. Motor run hot?? Motor ever flushed out prior to this>>?? Look at third picture on top of page??
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#17
11-13-2010, 10:46 PM
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the water jacket holes are not bad at all......cast iron....always looks worse than it really is......especially when it dries up
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#18
11-14-2010, 12:03 AM
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Quote:
If those areas are'nt flat enough,you'll likely be doing this again real soon.  Once water cuts a path it likes,it'll find that same path again unless something is done to significantly change that situation. Water is one of natures strongest forces,just look @ the grand canyon. Water under pressure is an even stronger force to try and contain. FWIW Bret P. |
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#19
11-14-2010, 02:06 AM
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Quote:
http://forums.maxperformanceinc.com/...d.php?t=643202 |
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