Hey guys...

i bought another engine block of a fellow scoobynetter on monday and would just like someone too confirm that the pics below are of a cross drilled V9 STi crank and V9 STi rods..

http://i1140.photobucket.com/albums/...y/IMG_2069.jpg
http://i1140.photobucket.com/albums/...y/IMG_2062.jpg

ive sent the crank off to my machinist as there was a bearing spun as in the picture below. the crank is being tested for allignment and also that the tolerances are acceptable.

http://i1140.photobucket.com/albums/...y/IMG_2076.jpg
http://i1140.photobucket.com/albums/...y/IMG_2075.jpg

could someone shed any light on why you think one of the main bearings would end up as below??

http://i1140.photobucket.com/albums/...y/IMG_2078.jpg

one last question how (if you can) can you tell if an oil pump is an uprated one?

I am trying to get a good build spec together with all of your help, and just want too make sure i have the right bits before i build....

 

Bumpy bump!

 

Crank is non Nitrided and has got cross drilled mains and the rods are the later bolt type.
The center main bearing shells have suffered oil starvation and the surface has broken up/de-laminated - looks like they have spun in the bearing housing too,so the crankcases need to be checked for wear as excessive wear will render the block scrap.

Have you got any pics of the oil pump ??

Mick

 

Hey Mick thanks for input!
Could you shed any light on what model of crank and rods they are??
If you look at my photobucket there is a picture of the oil pump on there.
Do you know where I can get a list of tolerances for both the crank and the block please too pass onto my machinist?
What engine does the rear thrust come as standard in? As this block with the cross drilled crank in has not been machined too take a rear thrust, it must of came standard with rear thrust.

Many thanks

 

Anybody???

 

Bumpy for more help!

 

anybody know where i can get the tolerances from for the ej20k block. have searched but can only find the guide on here and another via google however some measurements vary.

cheers

 

The search button is a pretty cool feature on here

https://www.scoobynet.com/general-te...93-2008-a.html

Mick

 

 

Mick wears his pants on the outside.

 

 

hey merlin, thanks but i already have those workshop manuals and cant seem too pin down engine tolerances etc for 2.0 98 engine.

the part 1, 2 and 3 are only brief guides and dont go in depth.
the engine pdf for 99-00 is great but it only lists tolerances and torques etc for 2.2 or 2.5...
are these tolerances too be the same as for my 2.0 97/99 engine build?

i cant get over how much information is on this site!! top guys!

many thanks "SUPERMAN!"

 

Im sorry,here you go

 

guys any further help?

 

The change over from centre thrust to rear thrust was MY99 and was designated a Phase 2 engine/6 bolt bell-housing.

If you cant find the tolerances in the manuals, then you need to give your machinist the crank,rods,torqued up crankcases and new mains and big end bearings.

He can then measure the crank to determine any wear/taper/ovality on the journals and final oil clearance on the big end journals by measuring/sizing the rods and big end bearings.

He can measure the main bearing housings in the torqued up crankcases to see if the spun main bearing shells have damaged/worn the bearing housing.
Once measured he can calculate the oil clearance on the mains from the measurements from the crank,crankcases and main bearings.

Hope this helps,

Mick

 

Mick,

many thanks that finally solves my problem!
what block am i rebuilding then? as the engine code from the car the engine is from is: EJ20KDW6PR which is a 96/97 sti import engine.
If that right shouldn't the block be centre thrust?
many thanks

TOm

 

heres a link too the block halves cleaned up and the oil pump for your input please...

http://i1140.photobucket.com/albums/...y/IMG_2111.jpg
http://i1140.photobucket.com/albums/...y/IMG_2112.jpg
http://i1140.photobucket.com/albums/...y/IMG_2070.jpg

many thanks for your help ;-)

 

I thought the MY99>on were 8-bolt bellhousing(?)

But they're actually 6, right Mick?

 

Rear Thrust crankcases from the pics in the links - have a look at the water pump mounting face on the L/H block half, should have ribs on the head bolt passage inside the pump mounting face.




Oil pump looks to be a modified one going my the 2 machined dots on the top left side of the pump by the stamped 10 (oil pump gear size).
It should have a straight bodied oil pressure relief valve and possibly a modified shim stack.

Mick

 

Depends if you call the 2 studs and nuts at the bottom 'Bolts'

 

Cheers Mick for response.
I can confirm that the block has the ribbing, so it is a rear thrust. But does that mean that this is not an ej20k engine block?
Good I'm glad the pump is modified ;-)

Going back too the failed bearing. I've been thinking, is there a possibility that the crank in the engine could be a centre thrust crank and that's the reason why only bearing no.3 picked up as it's not a thrust beating?
Really want too make sure the bits I have are right before j start building!

Your help is much appreciated!

 

Would think its a EJ205 crankcase set you have seeing as its Rear Thrust (EJ207 is semi closed deck rear thrust).
Center Thrust came as EJ20G/K/H/R/EJ22T/EJ25D.

Its quite possible someone has fitted a C/T crank in a R/T crankcase (seen it before) and normally wears the mains, rear of the timing belt drive pulley on the crank and the oil seal face on the pump.

Mick

 

Ha ha. I see what you mean.

 

Ahhh great so it seems I haven't got what I've been told I've got!
Are there any identifying cast marks or what not to destinquiesh between an EJ205 and EJ20K?
If I put up the numbers stamped on the crankshaft will this help determine which crank I have?
Cheers

 

The big problem is that I have bought pistons for 92-98 which I assume would be incompatible with the engine if it's an ej205 rather than an ej20k as told!
Cheers

 

 

Its quite ok to use Phase 1/1.5 pistons in the later crankcases as its only the compression height of the pistons which differ and determines the piston deck height,standard block height and rod length are the same on the Phase 2

The change to Rear Thrust was to improve thrust control and to reduce the transfer of natural engine frequencies to the transmission and drivetrain.

Mick

 

Hey Mick cheers, so how can I tell for definate which engine block I currently have?
Cheers

 

Bump bump

 

Evening bump as could really do with help on the above.
Cheers