Question about 1990 Subaru Loyale

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Head replacement, interchange w/ what yrs?

My machine shop says my heads are toast. what years are interchangeable for 1987 1.8 TBInjection non-turbo engine

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  • Subaru Master
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Looks like models from 1985 to 1994 including carb and TBI.

A salvage yard can tell you for sure.

Posted on Jul 11, 2013

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Posted on Jan 02, 2017

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SOURCE: changed engine but a non start

Valve Timing sounds off to me (belt driven to valves) You are assuming the timing marks on the heads AND your engine drive pulley are OK, right? Heads could be 180deg out which is easy to fix by taking off the belt at the heads and manually rotating the pulley once and retesting.

Pull a plugwire, shove a rope of twisted tinfoil into it and see if it sparks to block. If you get fire, then my very strong guess is that the spark and Gas/Air compression cycle aren't happening at the same time and the valves are 180deg out.

Posted on Apr 08, 2009

voices122
  • 12 Answers

SOURCE: i have a subaru ej20 turbo engine i am changing

Information taken from Subaru Impreza workshop manual.

Apply a coat of oil to washer and bolt threads.
First tighten all bolts to 29nm (22ft lbs) in this order.
Looking at head with front of engine on your left hand side
Top Middle
Bottom Middle
Top Left
Bottom Right
Bottom Left
Top Right
After doing this tighten them further to 69nm (51ft lbs) in the same order as above.
Back off (loosen) all bolts 180 degrees in same order as above.
Then back them off again another 180 degrees.
Tighten all bolts in the order above to 29nm (22ft lbs) followed by a further 80 to 90 degrees
Tighten all bolts in order as above a further 40 - 45 degrees
Tighten bolts Top Middle and Bottom Middle another 40 - 45 degrees

Job done.

Posted on Mar 15, 2010

  • 13 Answers

SOURCE: 1991 Subaru Legacy 2.2L not Turbo "Idle" very

i would check the idle air control solenoid first. simply unplug it then remove the unit and inspect the air passage for any blockage and carbon buildup. Clean it if its dirty then test it out. If the IAC is good then you should look at the throttle position sensor.

Posted on Sep 04, 2011

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