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Re: Trend pushrod failure
[Re: moparniac]
#765654
08/06/10 06:19 PM
08/06/10 06:19 PM
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Joined: Nov 2006
Posts: 1,090
north cakalaky
instigator
super stock
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super stock
Joined: Nov 2006
Posts: 1,090
north cakalaky
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Though would not expect such a heavy duty pushrod to break without some type of excessive strain to be induced to it....
65 Barracuda
All aluminum Indy HEMI with some boost!
COMING TO A TRACK NEAR YOU!
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Re: Trend pushrod failure
[Re: emarine01]
#765655
08/07/10 11:59 AM
08/07/10 11:59 AM
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Joined: Feb 2007
Posts: 6,295
U.S.
moparniac
OP
master
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OP
master
Joined: Feb 2007
Posts: 6,295
U.S.
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Quote:
See if you can look thru the spark plug hole with a good bore scope , check the exhaust relief in the piston for a contact mark, You wont always bend a valve with piston to valve contact, We broke a push rod in the middle like that pic of yours, turned out to be a guide that was too tight, I ran this engine for 2 weeks on and off at the shop and it was fine, broke the push rod on the return road after the first pass, I ended up pullin the heads cause I couldn't find the problem, I bought a good bore scope the next day 
got ahold of my buddy a machinist and engine builder and he brought over a bore scope  neither of us could see anything on the piston or the valve! Neat tool to have! laid a straight edge across the retainers etc. and all are straight! just trying to be as fair as possible here... we will see what Trend says and go from there now! 
Mopar Performance
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Re: Trend pushrod failure
[Re: moparniac]
#765658
08/13/10 06:52 PM
08/13/10 06:52 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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That break looks like its brittle material... and it would tend to break in the middle like it did... I would be waiting for Trends to say something(or call them) 
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Re: Trend pushrod failure
[Re: bigsbigelow]
#765660
08/13/10 09:00 PM
08/13/10 09:00 PM
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Joined: Jan 2003
Posts: 5,445
So Cal
Sinitro
master
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master
Joined: Jan 2003
Posts: 5,445
So Cal
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Quote:
Quote:
That to me looks like a brittle break - could be the steel was tempered wrong
If the steel was tempered wrong, ALL of the pushrods should be replaced..
We had a similar problem a couple of years back with some Crane ductile rockers..
Defective tempering process.. With the stress the valve train takes not worth the risk..
Just my $0.00.. 
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Re: Trend pushrod failure
[Re: pittsburghracer]
#765664
08/20/10 07:16 PM
08/20/10 07:16 PM
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Joined: Feb 2005
Posts: 20,190
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,190
PA.
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No word back from Trend yet?  I worked in a specialty steel plant and it never took us that long to test our product. I surely hope Trend is a company we can still trust to make a great product.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: Trend pushrod failure
[Re: PETE@BESTMACHINE]
#765667
08/21/10 08:43 PM
08/21/10 08:43 PM
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Joined: Feb 2005
Posts: 20,190
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,190
PA.
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Thanks Pete, Good to hear that. Its to bad people want to blame someone else before they make sure everything on there end was ok. Its not like we all haven't messed up a time or two but I guess pride enters the equation. Trend has been a trusted name in the racing world for a long time.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: Trend pushrod failure
[Re: moparniac]
#765668
08/21/10 08:49 PM
08/21/10 08:49 PM
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Joined: Feb 2004
Posts: 1,093
Long Beach, CA
Mike Swann
super stock
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super stock
Joined: Feb 2004
Posts: 1,093
Long Beach, CA
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If you roll the 2 pieces on piece of glass or surface plate, do they apprear to be bent?
You may need to dress the burr at the edge of the break.
8.30's @3400 lbs
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Re: Trend pushrod failure
[Re: HardcoreB]
#765669
08/21/10 09:12 PM
08/21/10 09:12 PM
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Joined: Jan 2003
Posts: 4,077
Shelby Twp. Mi
HardcoreB
master
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master
Joined: Jan 2003
Posts: 4,077
Shelby Twp. Mi
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Quote:
I'd start looking at the entire valvetrain before making any calls. How close do you run to spring coil bind? I'd throw an adjacent pushrod in the problem ho le and measure lift, watch trajectory during motion. Take a spring compressor (jesel-style) and see what addl. travel you have until C/B via the dial indicator. Get back with us.  If you bought the parts seperately and married them together then, unfortunitly the burden of responsibility lies on you (the end builder).
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Re: Trend pushrod failure
[Re: emarine01]
#765670
08/21/10 09:32 PM
08/21/10 09:32 PM
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Joined: Jan 2007
Posts: 3,695
nc
emarine01
master
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master
Joined: Jan 2007
Posts: 3,695
nc
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Quote:
Sledgie, did ya run the engine with the offset lifters on the exhaust side, the 4 wrong ones
Well... its still a valid question... unless I misunderstood the long YB trash post 
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Re: Trend pushrod failure
[Re: moparniac]
#765672
08/21/10 10:39 PM
08/21/10 10:39 PM
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Joined: Jun 2007
Posts: 2,646
Plymouth Meeting, PA
bigtimeauto
Trophy Winner
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Trophy Winner
Joined: Jun 2007
Posts: 2,646
Plymouth Meeting, PA
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I still have never seen one snap in the middle like that. I used to run 3/8ths .135 wall manleys and never broke one.
I now have 7/16ths .165 walls and picked up 700 rpm. So my old ones were flexing.
BB, TT5,Procharged 3300lb Street Car 4.79/154
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Re: Trend pushrod failure
[Re: moparniac]
#765673
08/22/10 02:23 PM
08/22/10 02:23 PM
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Joined: Jan 2003
Posts: 4,077
Shelby Twp. Mi
HardcoreB
master
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master
Joined: Jan 2003
Posts: 4,077
Shelby Twp. Mi
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Quote:
...just went by what supercomp said as I never messed with offset stuff before >>>BUT<<< it took until I emailed Bigtime a pic and the offset is supposed to be towards the exhaust lifter not away as listed in the post below!
I knew it!!! It was Supercomp's fault all along for not making certain you understood what he told you. I doubt he'll let you throw him under the bus again. I will give big props to Bigtime for being patient and helpful. I doubt this post will change how you operate but, as a business I personally would not do business with you based on how you've been posting during the whole process of your build. IMO you have bashed BEST, and Trend and then backpeddled. Yet the truth is not out. Noone, including you, knows what the real reason of the failure is because you have not taken the correct steps to validate measurements during building. I really hope you take this constructively and we move on because it appears you have built a cool car there. People here have been willing to help with good advise etc. so, you can do it yourself, and save or have some satisfaction.
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everyone will have there opinion on ALL parts Mfgs one way or another... I am up and running and going for that 9 on pump gas and radials real soon and im gonna leave it at that 