Dowels for cylinder head/block sizes

Paul V8 · Post by **Paul V8** » Mon Feb 15, 2010 5:22 pm

Hello again.

The new engine I'm building hasn't got any dowels in the block to locate the head, does anyone have the sizes of them so I can have some made.

Thanks

gelmonkey · Post by **gelmonkey** » Mon Feb 15, 2010 5:43 pm

Hi Paul
Can you not buy these from Rimmer Bros,RPI os Real Steel?
Sorry but dont have sizes so not a lot of help really.
cheers
Paul

bigaldart · Post by **bigaldart** » Mon Feb 15, 2010 9:52 pm

Pretty sure we made some from 1/4" rod. Just measure diameter using a drill bit and a caliper for the depth, leave enough space for air and make sure you have a healthy chamfer.

Alan

ppyvabw · Post by **ppyvabw** » Tue Feb 16, 2010 1:40 am

Just jam some suitably sized rod in the hole. I believe the dowels from Rimmer Bros that I bought were about 15 quid. Rip off! I see no reason for them to be case hardened as the normal items are.

spend · Post by **spend** » Tue Feb 16, 2010 10:17 am

bigaldart wrote:Pretty sure we made some from 1/4" rod. Just measure diameter using a drill bit and a caliper for the depth, leave enough space for air and make sure you have a healthy chamfer.

Alan

1/4" is the measurement I have used for gasket cutting patterns (6.36mm for the gasket hole).

ged · Post by **ged** » Tue Feb 16, 2010 10:35 am

Hi Paul,

Just pop down to your local engineers merchant. Ask for blind hole dowels. They are threaded internally for easy removal & have a small flat on the side to let the air out when you push them in. Shouldn't be more than a quid each.

Regards Ged,

DEVONMAN · Post by **DEVONMAN** » Tue Feb 16, 2010 11:10 am

Hi Paul.
I needed some quick once and used the blunt end of a drill bit that fitted snug. I then cut the end off with a cutting disc and used the bits as dowels. Can't remember the size though.
Regards Denis