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can excessive lash bend a pushrod ? #447327
08/23/09 05:51 PM
08/23/09 05:51 PM
Joined: Jan 2003
Posts: 2,431
USA
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SSAAHemiFan Offline OP
top fuel
SSAAHemiFan  Offline OP
top fuel
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Joined: Jan 2003
Posts: 2,431
USA
Can excessssive lash pound a pushrod over time and cause it to bend ??

Engine ran great, VERY slight miss. The valves were noisy so I pulled the valve cover to check lash and verify oiling and found the bad pushrod.

Lash was excessive but not enough to where the cup came out of the adjuster. Valve and lifter are operating and no obvious sign of a bent valve.

Car sat a LONG time, maybe a sticky guide when it was first started?

Can't get the pushrod out so the intake has to come off anyway, it's just the possible cause that's bugging me. It is amazing that it ran so well!

Leakdown good, TDC is correct, motor is all stock 50K miles.

Thanks

Re: can excessive lash bend a pushrod ? [Re: SSAAHemiFan] #447328
08/23/09 09:55 PM
08/23/09 09:55 PM
Joined: Nov 2008
Posts: 671
Wisconsin USA
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Bill MeLater Offline
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Bill MeLater  Offline
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Joined: Nov 2008
Posts: 671
Wisconsin USA
Check the lifter "cup" for signs of damage when you get the pushrod out. I had a couple of guides hang on me and it pouded the snot out of the lifter cups. Also dinged the pistons and bent the valves....Motor got a little HOT

Re: can excessive lash bend a pushrod ? [Re: Bill MeLater] #447329
08/23/09 09:58 PM
08/23/09 09:58 PM
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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69L78Nova Offline
Banned. Forever.
69L78Nova  Offline
Banned. Forever.
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
Excessive lash can absolutely bend a pushrod...quite easily too, depending on how high youre spinning it


1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser

1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
Re: can excessive lash bend a pushrod ? [Re: 69L78Nova] #447330
08/23/09 11:07 PM
08/23/09 11:07 PM
Joined: Oct 2006
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quick77rt Offline
Parts Problem
quick77rt  Offline
Parts Problem
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Joined: Oct 2006
Posts: 4,765
Listed on ebay as great condition and checked for straightness....The rockers show the 4 that had crazy lash which seems to have beat the heck out of the pushrods...

5436734-DSC07987.JPG (79 downloads)
Re: can excessive lash bend a pushrod ? [Re: quick77rt ] #447331
08/24/09 11:03 PM
08/24/09 11:03 PM
Joined: Nov 2008
Posts: 671
Wisconsin USA
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Bill MeLater Offline
mopar
Bill MeLater  Offline
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Joined: Nov 2008
Posts: 671
Wisconsin USA
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