fitting a 2.5 bottom end to my classic need help
 

i bought a 2.5 sti 10 bottom end to fit to my t2000 my00 planning on usingthe 2 ltr heads and inlet ive put the engine together using 2 ltr head gaskets and while trying to sort the cam timing out there is something stopping the piston from going right to the top. i researched the build before i commited to it and i know they block and heads fit together and i also know the bottom end is good. could the 2 litre gaskets be stopping the piston from finnishing its cycle to the top ????

everything rotates as it should till they get to the top im puzzled:confused:

or seen someone build, an a hoseclip fell into cylinder just as putting head on haha

classic!!!

i dont now ins and outs but its either a vlave or hg or "forgein debris" lol

the valves are open as there is no cam belt on to turn then. and the heads have just been put on so there is no forgein bodies in the cylinders

you really should of used 2.5 head gaskets, if the pistons rise above the deck height, they are quite probably going to hit the gasket what thickness did you use ?

ive used 0.7 composite 2 litre turbo gaskets standard ones, is it possible the bore on the gasket is fouling the top of the piston it isnt much out one tooth i think but the 1mm ish od gasket maybe stopping the piston from completing its travel

would of thought .7 is too small as well, when i built my old 2.5 i used a 1.6mm cosworth gasket, did you calculate compression ratio when you put it together or just bolt it all up and hope for the best ?

also if you want it to last i would of used a MLS gasket too, not composite

I just assumed standard build standard gaskets tbh didn't think bout any of the CRs involved

You need 2.5l headgaskets

Is that why my pistons aren't getting full travel ??

and because of this it looks like your doing it again im afraid mate

I would say so mate, the 2.5 pistons are 99.5mm and the 2 litre are 92mm I think

never assume anything when putting a motor together !

if you used 2.0 gaskets no doubt the piston protusion is causing the piston to come in contact with the compression ring on the gasket :eek:

lol

right so ill need to get some 2.5 gaskets what size do i need ???

i dont know how to work compression ratios

work out your compression ratio, then you will know

ive found this but im unsure of what info to enter

http://www.csgnetwork.com/compcalc.html

ive just had the veirners on the 2 litre gaskets i already have there actually 1.6 composite efforts

As above, your trying to push a 99.50mm piston crown through a 92mm gasket hole - aint going to happen - you will just bow the fire ring up on the gasket.

Mick

Any ideas on what gaskets I'm best getting size wise 1.6 mm or something different ?

All depends what static CR you want to run and Combustion chamber volume, piston bowl volume, piston compression height etc etc.
Would imagine with '00 cylinder heads and EJ257B bottom end - somewhere between 1.1 and 1.6mm thick gaskets and make sure you opt for MLS (multi layer steel gaskets) and not the composite gaskets which tend to fail around the lower coolant gallery's.

Mick

ok thanks for the help im going to see if i can get some gaskets today slim hope on a sunday but ill post up on the progress