Sticking valves Spider 82T engine .

[discopotato03]

The tail of woe is I put a can of Subaru Upper Engine Cleaner through my EA82T engine and it now has from 12.5 to 55 pounds of compression when tested . Everything external ie cam timing and belts look good so methinks this SUEC crud has loostened carbon and made my valves stick open . I'm not sure if its between the valves and seats or glueing the valve stems to the valve guides . I really dont want to remove the heads to fix this if possible .

 

Does anyone have an easier fix for this problem ?

 

Many thanks in advance , cheers Adrian .

[Turbone]

Run Marvel Mystery Oil through it.

If that doesnt work, try ATF fluid.

[skishop69]

+! If you can get it running, hold it about 2500-3000 rpm and slowly pour the ATF (or even cold water) into the intake. I doubt seriously that the guides are the issue if you ran UEC through it. Most likely carbon lammed in the seats. Cold water will break it loose best.

[AKghandi]

+1

Ive heard good things about seafoam maybe give that a shot.

 

But Don't pour the water into the turbo though. If you undo all the pipeing and unplug the maf it should still run. Not happily but it will run.(wont boost)

 

Ive got a video of me doing it on my old gl-10 (bad maf) its on youtube called subaru problems under my account "lockpickman"

[discopotato03]

The trouble is this engine won't fire any of its cylinders , not a cough or anything .

Also this is an 86 model RX sedan meanig it has the early "flap" type air flow meter .

I suspect it had a lot of carbon on the valves and since valve stems lean downhill in an EA82 I think the SUEC ran down the stems and with softened carbon glued things up . Did this to one or other valve in every cylinder .

 

A .

[skishop69]

Oh God yeah! Missed that. No bueno through turbo! lol

[ivans imports]

the hydrolic lifter cups come out of heads a bitt and will not alow the valves to close they can be pressed back with lifters removed and can be easly checked with valve cover off make shure all are about 1/2 a mm above the deck of head or flush is ok any higher need to be pushed back or you have a guide thats sliped down and holding valve up or you washed it down and trashed rings

[discopotato03]

My engine was properly rebuilt ~ 40K miles ago so rings should be good .

Will check the lifters now that the RHS cam cover is off .

I would have thought that lifters would bleed down eventually given that aside from cranking this thing has run for almost two weeks .

 

Current advise from engine builder is to crank Throttlebody and carby cleaner through the thing (SUEC style) and try and free it up .

I have to try something because this car is on limited time with me and I'm not pulling heads etc out to fix this .

 

A .

[jono]

Has Coxy left you on your own on this Adrian ?

 

I now see the point in disconnecting turbo from the fix attempt of solvent through things.

 

Thinking...if you poured solvent in spark plug holes, drill some small drain holes in the exhaust cross over pipes to be welded up later..as a drain option for the solvent so it does not get near turbo. Theory then would be need 1.8 litres of solvent 450ml at a time ???

[discopotato03]

I'm not worried about the turbo , it sits up above the almost equal length stainless header and the Ni Resist housing and Inconel turbine won't be affected by carby cleaner . The advantage of that stuff is it evaporates completely away leaving no residue - other than anything it tried to disolve .

I wouldn't obviously put this cleaner through the cold side of the turbo , more effective I reckon into the Spider manifolds plenum via its vacuum hose fittings .

Anyway cranked 1 1/2 cans of TB&C cleaner through and its sounds like compression may be coming up on a couple of pots , almost tried to fire a couple of times . Starter and solenoid got a bit warm and battery voltage falling so back on charge and will have another go later .

 

Yeah sometimes people fall below the radar for various reasons .

 

The experienced mechanics are scratching their heads with this problem because this situation is new to them . Most think that you never spray Subaru UEC into an engine that isn't running and the revs have to be right up when you do .

 

A .

[ivans imports]

I bet its a mecanical problem no amounts of cleaners will fix a mecanical problem. In a 1000 ea82s have never seen a stuck valve ever have seen many hydrlic lifter problems droped guides bent valves nuts on top of pistons even with smashed pistons valves still worked fine I even had one that was sugared and it had sugar glue on valves but dident stick i whould check guide heght to see if droped guide.

[discopotato03]

Since I posted I did a compression test and they range from 12 1/2 to 55 pounds .

 

I find it very hard to believe than 1 can of SUEC would cause valve guides to immediately move holding valves open . Hard to imagine any crud would get past the top rings in a 40K old engine .

PCV is out and cleaned though it worked fine anyway .

With the cranking compression so low something must be stopping the valves from seating .

 

A .