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#1
07-07-2017, 07:11 PM
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455 shot after only 100 miles
I had my 455 "rebuilt" and only got about 100 miles on it before I broke a rocker stud, bent a pushrod, and lost oil pressure at an idle. Here's a few picks.
      Sent from my iPhone using Tapatalk |
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#2
07-07-2017, 07:14 PM
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Sorry to hear about this
Hang in there. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#3
07-07-2017, 07:16 PM
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Thanks. The guy offered to do it over for free. But he made so many mistakes, he lost my trust. Just brought it to a new shop this morning. Hoping to have it done in time for Norwalk. Sent from my iPhone using Tapatalk |
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#4
07-07-2017, 07:25 PM
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Wow, quite a mess, sorry for your loss. Hope you are able to salvage somethings.
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#5
07-07-2017, 08:59 PM
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Good luck Dave, hope you can get it done in short order.
Sent from my XT1254 using Tapatalk
__________________
Giving To Others!!! V.P. Pioneer Valley GTO Association www.pvgto.com 67 Lemans 455 best et. 12.023@ 111 mph LVD 9/2008 68 GTO H.O. in progress? 
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#6
07-07-2017, 10:02 PM
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Geez, what a mess! Hopefully, the new shop can salvage as much as possible and build you a RELIABLE engine.
__________________
“It takes considerable knowledge just to realize the extent of your own ignorance.” Dr. Thomas Sowell |
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#7
07-07-2017, 11:11 PM
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I think I've seen all those issues before, but never on the same engine. Wow...
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1978 Y88 Trans Am 4-Speed 47k original mile Survivor |
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#8
07-07-2017, 11:25 PM
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Oh my...what a mess...
Not much a guy can do except move on...keep us updated.. |
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#9
07-07-2017, 11:28 PM
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Quote:
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#10
07-07-2017, 11:29 PM
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Looks like oil passages not cleaned before assembly, probably installed valve springs that require 1.700" installed height (without actually measuring your installed height). and probably undertorqued rod bolts (maybe ARP's torqued to OEM specs?).
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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust |
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#11
07-07-2017, 11:30 PM
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I agree, too many mistakes!
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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#12
07-08-2017, 03:12 AM
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Why are the head gaskets so dirty and oily with only 100 mi on it? Looks like he reused the old gaskets on top of everything else. It doesn't look like any time was spent cleaning the motor after machining (if there was any machining done). You should still see cross-hatching in the bores at 100 mi.
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#13
07-08-2017, 06:03 AM
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That was a full 7/16" rocker stud that got taken out , or a stocker?
Are those rocker arms made for a full 7/16" stud and you where using stock bottle neck studs? It's also highly likely that if you where running a non stick Cam that the needs longer push Rods then those stockers!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#14
07-08-2017, 06:33 AM
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Quote:
That's exactly what he did with the spring height. I have since changed to a spring that works with 1.6" spring height, along with 1.65 rockers. Funny thing is that he started out with stock springs and was floating the valves big time. Then he put the stiffer springs on and I broke the stud and bent a push rod. The guy said it's my fault for over revving it. My son removed the valve cover and noticed all the problems. Paul Spotts told us about the spring height issue. So I bought a set of springs from him. After that, it ran better. But we noticed it had no oil pressure at an idle. So we pulled the motor and the very first rod bearing we saw is the on in the pictures. Sent from my iPad using Tapatalk |
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#15
07-08-2017, 09:34 AM
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Nothing that can't be fixed with time & money.
You've got two other cars you can bring to race at Norwalk - I expect to see you there! 
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Some guys they just give up living And start dying little by little, piece by piece, Some guys come home from work and wash up, And go racin' in the street. Bruce Springsteen - Racing In The Street - 1978 |
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#16
07-08-2017, 09:54 AM
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Ouch, sorry to see this. Fours years ago, I had a full tear apart performance rebuild of my 455 at a "reputable" shop in town. Ran like crap at the get-go, got frustrated with the band aid fixes and excuses, and went out of town about 60 miles to another long-time shop. It was totally torn apart again, and there were too many issues. Started from scratch, they did an excellent job, told me to drive it like it was stolen, and I have had a smile on my face since. Good decision on your part.
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#17
07-08-2017, 10:02 AM
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Jacobs car is going if mines not ready. I don't like the clutch in my 2000 Trans Am. Sent from my iPhone using Tapatalk |
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#18
07-08-2017, 10:14 AM
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Thanks. I'm keeping my fingers crossed. I've had nothing but bad luck lately. So I really need that to change. Sent from my iPhone using Tapatalk |
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#19
07-08-2017, 10:21 AM
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I know it was a spring issue, not sure about the oil problem, but good custom push rods are cheap insurance. Call Manton and get a set once you know what length you need. Make sure with the 1.65 rockers toy have the clearance for them.
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#20
07-08-2017, 10:26 AM
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Call Pete - Valley Auto Machine in Seymour
__________________
Some guys they just give up living And start dying little by little, piece by piece, Some guys come home from work and wash up, And go racin' in the street. Bruce Springsteen - Racing In The Street - 1978 |
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