[DeTomaso] Bent (stock) pushrod

[John Buckman]

Dan,

While the beefier pushrods may be the solution, another item to check is the lifters.

Another Pantera owner had a similar problem with a bent pushrod.
The valve springs were checked (binding, installed height, etc) and determined to be ok.
A new pushrod was fitted and the valve was adjusted.
Engine ran great, and on a short drive, the pushrod bent again.
Again, everything looked ok (except the bent pushrod).
The lifter was taken to Crower for testing.  Crower put the lifter in the squeezer to check for
leak down etc, and the lifter shattered.  The bent pushrod was replaced along with ALL of
the engine's 16 lifters.   
Problem solved.

John



On Aug 1, 2010, at 5:09 AM, Daniel F Courtney wrote:

> The good news is The Winged Warrior is back on the road (more on this later),
> The bad news is a pushrod bent at 1,500 miles on the new(est) engine.
> This caused the #7 intake lifter to pop out, creating a bad miss,  high idle, low oil pressure and heavy oil smoke out of the left tailpipe, causing me to wonder if I'd lost yet another brand new motor.
> The engine builder is telling me these stock pushrods can't hold up to the new double valvespings in the new set of beefed up ($2k) 2bbl domestic heads.
> His solution is to upgrade to some heavier Crower pushrods.
> If that's the case I wonder why the stock pushrods weren't recommended for replacement?
> I'm getting tired of paying for the same work, over and over.
>  
> Dan
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