i want to get the block o-ringed for the a15ett, please tell me this can be done without pulling the bottom end apart?

Is this a serious question ?

michael,i think with the amount of swarf iy'd make,you'd want to strip the motor to clean it out.so,i'd say yes,it has to be apart.

There is no question that the block must be striped clean of everything. A huge amount of swarf is produced because a small milling cutter must be used. You have no choice if you want your block 'O' Ringed.
You wont find a machinist that would be prepared to do it any other way.
Sorry but that means more work for you to do if you want the block done

I had a home made cutter that centred in the bore and was hand operated on a screw feed that could be manually adjusted. This was done in the car.

All you had to do was make a rag plug in the bore and coat with grease then block all the galleries with grease. The "O" ring slot is only 0.040" (1 mm) wide and 0.020" (0.5mm) depth for 0.040 (1mm) anealled stainless wire. This only makes a very small amount of cast iron cuttings.

Its not as difficult as it sounds.

Is this a street engine, or an all out competition engine?
If it's for street use, then why on earth do you need to "o" ring it?

If it's an all out competition engine, then pull the whole bloody thing down & do it right.

Ferral Errol is right about the rag plug etc. but, if it's a STREET engine, & if you are having head gasket problems, then fix the ACTUAL cause rather than wasting your time & money on "O" ringing the block.
Chris

It depends on the type of o ring used. If you use wire a trepanning tool centred in the bore can be used like Errol said but if use want to use Nitrogen filled "Wills" O- rings you may find it better to strip the block. I have done them in place and had no problems.

How easy are "Wills" O rings to get in NZ?

I am having trouble getting them here in OZ and my mails to the UK parent company go un answered???

They are the best sealing method for very high comp and boosted engines

Dodgeman has a good point !
This thing has 2 turbos RIGHT!
Right,well then this engine should`ve been built with some serious BOOST in mind.
This is not intended to insult anyone,but don`t you think it should`ve been done
right the first time ?
This saves a lot of headaches afterwards,as you`ve already found out !

Dude bite the bullet,strip it down and while it`s apart give everything a good clean & inspection. This could only have a positive effect such as "PEACE OF MIND" and a Lesson well learned !

GOOD LUCK

I've always had to go to England to get wills rings.
You could try Randal Edgell (edgell automotive) in Auckland. Randal is not scared to write out an invoice however!!!

Actually, although I've never tried to turbo an A series, I gave up o-ringing the A12 when I discovered the NISMO headgaskets. I never managed to blow one, despite the neglect and abuse...