is there any way of telling a closed deck block from an open one without taking it apart?

engine numbers,castings or anything like that???

 

no.

David

 

Apparently the surface texture of the block differs from closed to open, due to the different casting process . You would really need to see them alongside each other to notice the difference though

Run it at 1.8 bar and if the head gaskets hang together on a track day it's probably a closed deck

 

I've got one.

 

there is another way apparently, but I'm not telling

 

c,mon please tell,pretty please with a cherry on top

katana- how do you know,not all the early cars had them???

 

ive got one too, and i know as my engines in bits

 

not the best way to find out though is it???

 

.

[Edited by Pavlo - 8/26/2002 2:00:07 PM]

 

adams going to say if its a 22b... then thats the way to tell..

David

 

nope.

I cant say as I dont know myself, but I know that there is a way to tell.

katana is right though, pretty much all the 92/93 cars had them, and if you have them in bits, that also helps, oh, and if its a 22B!

 

hi all
there are different markings between the two types of blocks
(etchings)
Im not sure which is which but I know thats the difference
Regards

 

what sort of markings mate, where are they?

if i know, then i can help as my block is sat on the garage floor, then johnny can check his too

ian

 

jonny, why do you think I went for an MY93 WRX? I heard somewhere that it had a closed deck block. Besides, I think you have one yourself as its an MY95 right?

 

katana, not true.

it isnt so clear cut as time went by. most 95s I have seen ahve been open.

 

But a breakers told me that all MY93s have a closed deck block. We're getting conflicting information here..

 

anyone know what the markings are then???

 

over 300 views and still know body knows!

 

.

[Edited by Pavlo - 8/26/2002 2:00:24 PM]

 

katana,

no there are no conflicting views.

I said most 95s arent closed. None of those I have seen has a closed deck.

We agreed on 93s.

as far as telling from the outside is concerned, as we said it is difficult to tell.

need to see them side by side out of engine to know which differences to look for.

I know the finish and webbing is different, but cant say where.

 

pavlo-never said there whas a problem,just wanting to know if you can tell them apart without taking them apart.

if you don't know,don't post

 

My MY94 WRX has a closed deck. I know I've seen it!!

 

I have never really understood why the closed deck block is so great. Obviously it is a lot stronger than the open one, but I have never heard of anyone cracking a block here? Rods and pistons letting go yes, but never anyone cracking a block.

 

.

[Edited by Pavlo - 8/26/2002 2:00:51 PM]

 

yeah right.

 

que thread entitled

"EJ20 closed deck blocks the conspiracy of silence"

 

[Edited by Pavlo - 7/30/2002 11:15:20 PM]

 

simon,

i think the main reason for people prefering the closed deck block is its resistance to flex under high boost and temps, and hence less chance of head gasket failure.

cheers
ian

 

jonny,
i think we should ask harvey, and we can try and draw comparisons between our own engines.

 

.

[Edited by Pavlo - 8/26/2002 1:59:51 PM]