Fearing the worst.. ('81T)

MY_STI · Post by **MY_STI** » Tue Jul 25, 2006 6:23 pm

Rocker cover breathers are full of coffee, traces on the dipstick, compression readings of 700, 650, 550, 550 (in KPa 1,3,2,4, respectivly) and its lining the rocker covers, but no traces of water in the drained oil. Should have the heads off by friday arvo. No significant event recently that I would link to this.

Am I signing the ol' ea81T off a bit early?
Is there a chance anyone has a spare head or two, moreso the left?
Is there anywhere else the water could be picked up from, (condensation?) running open/filter breathers (no PVC). no river crossings of late either

Is it time to update to 4 valves per cylinder and distributorless ignition?

Jeff · Post by **Jeff** » Tue Jul 25, 2006 7:57 pm

Check the welsh plugs in the heads and if they are the problem replace them with brass ones

MY_STI · Post by **MY_STI** » Wed Jul 26, 2006 7:19 pm

Thanks Jeff, hadn't really given them any thought, as I didn't notice any external leakage, I assume there are also internal welsh plugs?

Jeff · Post by **Jeff** » Wed Jul 26, 2006 7:49 pm

i have sent you a pm explaning what i mean

BRUMBERTY · Post by **BRUMBERTY** » Thu Jul 27, 2006 9:23 am

RayZ on the old, old, board had a set of 81T heads, or access to a set.
I will try and dig out his details.

Sorry to hear about the mayonaise. how cold has it been getting at night?

BRUMBERTY · Post by **BRUMBERTY** » Fri Jul 28, 2006 1:47 pm

Talk to us Will.
PM me your mobile number,
lost phone with all data.

MY_STI · Post by **MY_STI** » Fri Jul 28, 2006 6:25 pm

Double checked compression on a good tester, got 825, 800, 850, 750 (KPa 1,3,2,4) which seems better than previous results. Might sign my tester off.

I reckon Jeff is on the money though.

Have to move the RX out of the shed before I lift the engine out, hampered by the fact it has no front running gear on it at the moment.
will wheelbarrow it out tomorrow.

Thanks guys

BRUMBERTY · Post by **BRUMBERTY** » Sat Jul 29, 2006 9:26 am

SKateboards under the front to move it!!!
Little welsh plugs under the rocker covers are the likely culprit?
I hope so.

MY_STI · Post by **MY_STI** » Sat Jul 29, 2006 6:40 pm

Didn't need the skate board, suprisingly light with nothing in it. I eat all my weetbix!

Anyway, welsh plugs all appear to be ok, they already have brass items in, gave them a scratch and a poke with a centre punch and they seem healthy.
Will replace them anyway. But unfortunatly they dont look like the problem.

Any other possibilities? time to take the heads off?

tassyraider · Post by **tassyraider** » Sat Jul 29, 2006 7:11 pm

SIR sorry to hear that the welsh plugs wernt the fault.check the weak side of compresion first,then find out about gaskets for the head, hmmm i smell a ej transplant hapnin if need be we can put the ej18 in to sample the motor of mine if were struggling,for a short time till im ready.then i can sort out ECU mabe c u 2moro cheerz GOD

redskin · Post by **redskin** » Sun Jul 30, 2006 8:38 am

Sounds like a HG on it's way out or a weepy intake gasket.

MY_STI · Post by **MY_STI** » Sun Jul 30, 2006 3:22 pm

Well,
both heads have a crack between the valves, gasket on number three had blown out a little to a head stud, and a valve has hit the cylinder from my previous issue with the pushrod.

Can the heads be successfully welded?

Really leaning EJ about now.

BRUMBERTY · Post by **BRUMBERTY** » Mon Jul 31, 2006 9:37 am

Buggar.

Move on.

Let me know when its all happening, I will give you a hand.

Keep the LPG, EJ25 block and pistons. EJ22 Heads.
11.35:1

Should scream as a Normally Aspirated unit.