Jump to content
Ultimate Subaru Message Board
archemitis

ea81 big or small valve head?

Recommended Posts

i've been sifting all day long...

do hydro lifters go hand in hand with big valve heads?

i have an 84 motor with solid lifters, does that mean i have the small valves?

Share this post


Link to post
Share on other sites
i've been sifting all day long...

do hydro lifters go hand in hand with big valve heads?

i have an 84 motor with solid lifters, does that mean i have the small valves?

 

I believe all hydro lifter ea81 motors have the large valve heads.(At least all of the ones I have seen do.)

 

I know that some solid lifter motors from around '83 1/2 to '84 started to come with the larger valve heads. I have heard that some even back in '82 could have come with the larger ones but that I don't know for sure.

Share this post


Link to post
Share on other sites

hate to post an "i think so," but my recollections tend to mesh with what was stated above.. the hydros were all large valve, but some later solids were also large valve. I wouldn't bother saying anything, but since you've only gotten one "I think so" thus far, I figured I would double that count.

Share this post


Link to post
Share on other sites
All 83+ engines were large-valve. Solid or Hydro - doesn't matter.

 

GD

 

Just to ad to this incase one finds an engine that's no longer in a vehicle;

 

Angled corner on valve cover = large valve.

All corners rounded = small valve.

Share this post


Link to post
Share on other sites
Just to ad to this incase one finds an engine that's no longer in a vehicle;

 

Angled corner on valve cover = large valve.

All corners rounded = small valve.

 

Has anybody got a photo that illustrates this? I know this is a rule for 1600/1800 identification that for the most part works but maybe not on the later 1600 (84 and newer)

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×