t3 head to pre-common block?

[cj011]

okay i am just tossing around ideas. outside of having the intake manifold hit the distributor on the pre-common block, would everything line up the same and yes the pistons will have to be t3's? would the t3 crank gear work in the pre-common block? yes i know that the cast crank is not idea, but with cryro treatment and a tall deck block i maybe able to rest easier. thanks..chris

[MoparBoyy]

should work... if you make a custom intake you can still have the distributor

[cj011]

so all the belts and accesories should line up?

[MoparBoyy]

Quote:

Originally posted by cj011 so all the belts and accesories should line up?

i would think so, i have never tried it but i don't see a problem

[Dan Culkin]

Quote:

Originally posted by cj011 okay i am just tossing around ideas. outside of having the intake manifold hit the distributor on the pre-common block, would everything line up the same and yes the pistons will have to be t3's? would the t3 crank gear work in the pre-common block? yes i know that the cast crank is not idea, but with cryro treatment and a tall deck block i maybe able to rest easier. thanks..chris

The T3 timing belt pulley on the crank is made for the small snout crank, which only came in common blocks. You can make it work, just not directly.

[cj011]

is there anything that you can recomend to resolve this problem? can you clarify alittle more as the differences between the crank snouts.

[MoparBoyy]

Quote:

Originally posted by Dan Culkin The T3 timing belt pulley on the crank is made for the small snout crank, which only came in common blocks. You can make it work, just not directly.

o yeah, i forgot about that.. sorry i've always tossed T1 blocks to the scrap yard and installed common blocks in all my cars :big grin:

the timing belt pulley is differant, you need to install a round tooth timing belt pulley, which isnt really a direct fit like Dan said, i think you can have something machined to fit.. like a spacer.

[cj011]

so the pulley will not directly bolt on. is it because the crank snout is too large, too small in comparison with the pulley? why would i need a spacer? thanks guys

[Dan Culkin]

Quote:

Originally posted by cj011 so the pulley will not directly bolt on. is it because the crank snout is too large, too small in comparison with the pulley? why would i need a spacer? thanks guys

Hey man,

No spacer ... the T3 timing belt is wider than the T1/2/4 belt, and is of round tooth design, and was only made for common blocks. The timing sprocket on the crank has a smaller hole in the center (common block crank is thinner there), and of round tooth design. You need to use the T3 specific timing gear, and would need to either machine down your non-common block crank snout, or adapt the T3 front seal retainer to go on to your pre-common block and use a common block crank.

Note that the T3 timing belt has an extra pulley, and also requires a smaller intermediate shaft sprocket. Note that if you wanted to use a distributor to run this engine, it would be spinning 3/2 the rate it's supposed to due to this I-shaft sprocket.

Dan

[cj011]

okay, is there a smaller intermediate shaft sprocket available? also could would a timing belt setup similar to the neon dohc conversion work to get around needing the extra pulley, or any other way around this? t3 crank, 2.5 pistons, tall deck pre common block. that maybe something worth pursueing...thanks guys

[cj011]

any suggestions. i am sorry to keep pushing this but i really need to make a final decision within the next week. can i instead use the neon dohc timing gears and use a belt designed for the neon dohc route.

[Dan Culkin]

Quote:

Originally posted by cj011 any suggestions. i am sorry to keep pushing this but i really need to make a final decision within the next week. can i instead use the neon dohc timing gears and use a belt designed for the neon dohc route.

The Neon DOHC (and SOHC and 2.4) cam and crank gears are larger, you wouldn't have the right ratio.

You need a T3 specific crank gear and the stock T3 intake cam gear at a minimum (to run the cam sensor). What you play with for the rest is up to you...

[Turbodave]

Just a thought, didn't the early 2.5 TBI cars have a round tooth belt (at least in 88 from what I remember). Not sure if these had the large crank snout, but it might be a possibility if the crank sprocket was wide enough and the right diameter.

[Dan Culkin]

Quote:

Originally posted by Turbodave Just a thought, didn't the early 2.5 TBI cars have a round tooth belt (at least in 88 from what I remember). Not sure if these had the large crank snout, but it might be a possibility if the crank sprocket was wide enough and the right diameter.

Crank sprocket is wide enough, but the teeth aren't cut all the way to the outside like on a T3.

[cj011]

i am sure that the crank snout can be worked about, but what about the t3 having an additional pulley for the timing belt?