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82760, dowels in the block, need to know something....get in here
Posted by turbo8u, Nov-16-04 08:29 AM

on the corners of the block are dowels that the head seats to, i need to know the O.D

82767, RE: dowels in the block, need to know something....get in here
Posted by xcasbonx, Nov-16-04 08:57 AM

I don't know an exact O.D., but I ran into this problem as well during my rebuild. I just found a small socket and tryed to match it up as close as possible and went to a local machine shop and asked for a couple dowels that they could match as close to that size. They were slightly bigger so I "modified" them to fit, never had a problem.

Built shortblock 8.8:1 CP pistons, Eagle Rods
Built head w/ P&P by ERT
Apex'i N1 catback
injen short ram intake
magnecore 8.5mm wires
EGR removal/blockoff
front/rear strut tower bars
GSX dual piston calipers
3000 stall torque converter

82773, RE: dowels in the block, need to know something....get in here
Posted by turbo8u, Nov-16-04 09:50 AM

Originally posted by xcasbonx
I don't know an exact O.D., but I ran into this problem as well during my rebuild. I just found a small socket and tryed to match it up as close as possible and went to a local machine shop and asked for a couple dowels that they could match as close to that size. They were slightly bigger so I "modified" them to fit, never had a problem.

shibby, just took a trip to my machinists shop and he had over a hundred of them just kickin it :P i grabbed a handful and ended up the first two i tried worked aye perfecta

i'll micrometer the o.d and post it in here for future searches

82855, RE: dowels in the block, need to know something....get in here
Posted by turbo8u, Nov-20-04 05:34 PM

O.D is 14mm

126120, RE: dowels in the block, need to know something....get in here
Posted by Ajax, Jun-16-09 09:33 PM

Can anyone give me the lenght? I have a fresh block with no dowels got some from Mitsu but they are a tad to big so I am getting them worked down but just want to make sure about the lenght.

126121, RE: dowels in the block, need to know something....get in here
Posted by xcasbonx, Jun-17-09 06:23 AM

Originally posted by Ajax
Can anyone give me the lenght? I have a fresh block with no dowels got some from Mitsu but they are a tad to big so I am getting them worked down but just want to make sure about the lenght.

Can't be much more than a 1/2" long if I remember.

126156, RE: dowels in the block, need to know something....get in here
Posted by CODE4, Jun-18-09 09:16 AM

Originally posted by Ajax
Can anyone give me the lenght? I have a fresh block with no dowels got some from Mitsu but they are a tad to big so I am getting them worked down but just want to make sure about the lenght.

I have extras at home that I will mic for you when I am done at work.

Which do you want? Bedplate to block, block to head, or block to trans?

126198, RE: dowels in the block - PART #s and dimensions
Posted by CODE4, Jun-20-09 02:20 PM

The following information is for the three different sized dowels on a 420a as well as an EDZ. All measurements are in inches and taken with a 0-1" micrometer. Height by Diameter.

4448856 - Cylinder Head Dowel - 0.484 x 0.575

4694106 - Bedplate Dowel - 0.460 x 0.473

5240849 - Block to Bellhousing Dowel - 0.493 x 0.631

A quantity of 2 each is needed if you are replacing them all. It is not necessary to buy these directly from the dealer (they are only a couple bucks each though). If you can find these at a machine shop supply or hardware store it is not absolutely crucial to have the measurement down to the 0.001" as you can modify a slightly larger one to work.