these are new! ....... .135 wall $270 pushrods. im calling best machine in the morning. luckily this only happened when I was cranking the engine over and didt fall down into the engine...
I dont trust any of them in my engine now!!!
I want a whole new lot!

WOW my new Mantons should be here tomorrow would hate to see something like that happen

Before you try another take a good flashlight and have someone turn the engine over to make sure the pushrods are not rubbing on the block or heads. I had some major grinding to do on both my Keith Black block and the 440-1 heads but I am using 1.6 rockers.

1.65 TDs here... block was clearanced and I had the heads pushrod clearanced also... heads/pushrods came from same place! I am gonna look things over more closely tomorrow! I have everything apart right now!

Just seems to clean of a break for me!

do you have offset intake lifters? Was it a intake?

It was an exhaust on #8 . this pushrod has no marks on it!

I'd call up Manton and order a good set.

Did ya check for piston to valve impact, to see if a exhaust valve hung?

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).

Well the heads/ pushrods / rockers and spring package all came from the same place all new !!! PtoV was .110 intake and .140 exhaust ... I'm not blaming Best Machine here one bit so no one twist that! They have contacted Trend and I am sending the whole lot to trend to be analyzed ... I have about 180 miles on my engine I believe it will be on my new odometer I installed. Once and if the pushrod was to blame we will go from there !!! Best Machine has been top notch to me from day one when I first bought all if this...

That to me looks like a brittle break - could be the steel was tempered wrong

I would tend to think its a break based o9n some some of meterial issue or during the heat treating process. I believe Trend buys there moly tubing in 21' lengths. ( maybe rolls but I dont think so) Once they determine what lengths they need. the tubing will go thru an annealing process. Thats usually about 1-2" from the finished end of the required tube length. I'd have to guess, they may find a problem in that arena. john is a good guy at Trend, and he will get you an answer for sure. It will be interesting to see what they find.

I have seen Smith Bros. do the same thing, I had one break during a pull on the dyno, it broke the top off of a Crwoer roller lifter and ended up guaging the cam lobe On eof my freinds had the same thing happen on another set of Smith Bros but it broke at the very top under the ball cup end, mine had a defect in the material where it broke I now have Mantons in all of my motors, PM if you want a set. I'm a dealer for all three companys

sorry guys I had to walk away from frustration for a bit... anyways I sent the pushrods back to trend (thx to Best Machine for QUIK assistance) and no I didnt do any procedures mentioned about and NO I dont have one of them fancy LSM spring compressors... what I just went out and did with a air compressor is fill the cylinder with air it holds alot of pressure but it seeps air coming back out the o ring into the spark plug hole(cant get in there to tighten it hard)! when I disconnect the quik connect from the air line it blows back out a ton of air pressure and I imagine some will leak past the rings... also with the air line still attached I put my hand over both exhaust pipes (x pipe setup)and can feel no air coming out and put thin little strings over the pipe also and they are not moving so Im taking it piston didnt hit the valve here. thoughts and opinions welcome.... sorry its the only test I could do at the moment cause some requested I do so!

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

no bore scope here .... Im just gonna have to wait and see what trend says as they are gonna inspect them over! Its hard to believe a ptov contact (if the valve hung open like you said) wouldnt bend a valve but snap a thick "Trend" .135 wall HD pushrod so clean like that... youd think the valve would bend and pushrod bend before that happened to a "Trend" pushrod... should know something from Trend next week!