[DeTomaso] Bent (stock) pushrod

Don Thomas dt at ieee.org
Mon Aug 2 02:36:39 EDT 2010


Dan,

Just curious.... What cam and lifters were or are you using?

Thanks,
-dt


John Buckman wrote:

> 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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