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When did they switch to Hydraulic?
https://www.slantsix.org/forum/viewtopic.php?t=23194
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Author:  tony h [ Tue May 15, 2007 1:32 pm ]
Post subject:  When did they switch to Hydraulic?

Cleaned up a head on 1970 Valiant. Ran engine Hot gapped the .01 intake and .02 for exhaust.

All went well . Car sat for 1 week, he started it yesterday and it ticked big time for about 1-2 seconds then all went quiet. I swear it sounded like empty Hydraulic Lifters filling. I thought this was a Solid Lifter engine?

Author:  SlantSixDan [ Tue May 15, 2007 1:37 pm ]
Post subject: 

If you were able to adjust the valves (because there was an adjustor), then it is a solid-lifter engine. The first production test of hydraulic-lifter slant-6s was in '78, and all of them were hydraulic starting in '81.

Sometimes the "stretch and yawn" sounds of a dry engine can sound a lot like it's hydraulic.

Author:  Romeo Furio [ Tue May 15, 2007 1:40 pm ]
Post subject:  lifters

I think around 81 . My 80 Volare' was solid. it has never happen to me but I have heard that a sticky valve guide may happen momentarily after sitting for a while. Just a thought.

Author:  tony h [ Thu May 17, 2007 6:51 am ]
Post subject:  Stretch and yawn..funny

OK, they are Solid. That sound through me, needed to ask.

Thanks

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