rockers seem to come lose after short drives :/

dreweder90

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So my rockers after short drives seem to become untightened after a short cruise around town. Getting on in just once in a while and not spinning the rpms over 6k..

Afr heads
1.6 roller rockers
Helpp please and thanks!
 

big dad

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If you put a 351 in to replace the 347 the 351 has a higher deck height.

302= 8.2" deck height
351= 9.3" " "

Did you remember to change the pushrods to the correct lenght for the 351?
 

dreweder90

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Yea of course. There a hardend push rod. corrected length as well. The rockers sit on a stud and I have a nut that screws down. I find zero lash. The do a half turn. Then lock the allen lock inside the nut. Then turn the nut just a bit more. Either I start it up and they are worse then before. Or I actually fix it but like 20 miles later you can start hearing the small ticking of rockers becoming lose
 

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