pendejon

sup guys, im planning on buying my boys built d-series bottom end. all it needs is rods, and i plan to make a hole in the back of the block for a air catch can like the b-series come with.

i know the block has a block guard, but i'm afraid that extra holes were not drilled in it to help the coolant flow in the water jackets like larry at endyn likes to do. the block guard is already pressed in, and the block has all the bearings pressed in. can i still have someone drill the holes, or is it too late. i dont wanna buy the block and then end up having to build a new one.

please shed some light on the matter for me. all help is appreciated.

ProzacOverdose

very true.....i personally hate cheap block guards. get it done right. there should be enough block guard post here to answer why we dont like them!

Guy-Fast

I dont know blockguards have been used in some pretty high power applications. Being around dave from dhr for years I saw plenty of his builds make low 400's and mid 10's on blockguards. They were all welded in.

Guy-Fast

They were street driven cars but far from daily driven just weekend/track cars. He had is own line that didnt have cooling problems but he hasnt had them for years.

whiterice

So the it's a bare block with only the crank installed?
You should be able to drill out the holes if so. Put some grease in the drill veins to catch some shavings. Use a high pressure nozzel to clean the passages. Clean the cylinder walls with whatever alcohol or solvent you use after.
To be safe, you could remove the crank.
Block guards are fine if they are the right kind. From my experience, the problems arise from the small passage type that don't allow the coolant to pass.

HMT-Admin

The only way I would EVER have a block guard is if it was welded in, holes were decently sized so coolant could flow and the block was decked and bore/honed after.

pendejon

thank you, that sounds good. my friend has a block guard that is in his built motor making 400+whp, but properly flowing cooling. i dont know about welding block guards, but both his and the one in the block im considering buying has the guard. and for your info, the block has arp rod bolts, arp head bolts, je 9:1 pistons, and a block guard. new bearings, etc.

i would like to get crower billet rods, and have the rods and pistons balanced. also, cleaning up the piston would lower compression and help reduce chances of detonation with a smoothed out dome .