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Right on, that'd be hydraulic.

 

Another source of high engine friction is the valve train. Hydraulic lash adjusters (HLAs) are always in contact with the valves. The hydraulic pressure of the lash adjuster must be overcome during operation and during the most critical time of engine start. To overcome this situation and to contribute to the total reduction of friction loss, 1997 and later SOHC engines have solid valve adjusters.
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hey thanks guys! the other half's 90 Leggy sedan started ticking the other day which brought up the question...he is due for an oil change, so that should clear it up...

 

I knew the newer models had changed to solid, but wasnt sure about the early ones - still learning about these cars!

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The new generation Subaru's have SOLID lifters??? You mean they have to be adjusted?? WOW...didn't know THAT.

Fox

Well, new gen sohc '97 and up anyway. The dohc 2.5L '97+ I think has the bucket&shim style lifters with 94 shim sizes.

 

The '90 Legacy 2.2L has the hydraulic lash adjusters. Actually that engine probably has the large HLA's.

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