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Filling Block With Hardblok Procedure Questions.....

Ramius83

By Ramius83,
in Engines & Forced Induction

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Ramius83 Collaborator

Ramius83

Posted
Posted

Hey guys, got a quick question for you. I picked up a Series 1 RB30 block and I have cone down to the point where I am about to fill the block to the bottom of the lower welsh plugs. When I removed the 30mmlower welsh plugs on the intake side of the engine, there is maybe an inch or less of empty space below the plug bottom. And on the exhaust side, there is cast right up to the bottom of the plug. I was under the assumption that there was quite a bit of dead space there that needed filled.

Also, did any of you bolt the head or a torque plate to the block when the HardBlok was hardening?

Any help with this would be greatly appreciated. Thanks in advance......

Johnny_B Enthusiast

Johnny_B

Posted
Posted

id also be interested as im considering doing this to my motor.

but had a couple of questions if it'd work for me as i was planing on running the motor on 98, but with water injection would i see super high temperatures sitting in traffic? or sitting on the start line at a drift event?

sorry to hijack your thread just really curious

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

No you wont. I've had 3 motors with filled blocks now, sits 70 degrees with a tri-pass radiator on a 25 degree day...

Pretty standard for quite a lot of builders out there really. Only difference is "how much" is filled, people have their own ideas etc.

Ramius83 Collaborator

Ramius83

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Posted

If everyone has been filling to the bottom of the lower welsh plugs, then I don't even have to touch the exhaust side of the engine. There is literally cast block right up to the bottom of the exhaust side engine lower welsh plugs. At this point, it almost makes no sense to even do it lol, seriously. I doubt that even filling only the intake side with about an inch of HardBlok will do me any good at this point. And everyone means the lower welsh plugs, right??? Not the upper 22mm welsh plugs?

XKLABA Grand Master

XKLABA

Posted
Posted

I have just done this to a RB30, put all frost plugs in except the one at the front on the exhaust side then get the bung from the oil return line on the exhaust side and put it in the heater line fitting on the intake side then get block level and fill til it is level with the hole you can see through the frost plug not put in, that will have it 10mm above the bottom of the stroke with RB25 pistons and 2-3mm into the heater hose line and well above the water feed line for turbos

I had the machining done after HardBloking it so didn't need a torque late

note: make it runny almost like pumpkin soup and spread it evenly around the block, I got a oil syringe from autobarn cut the end nearly completely off and used it to spread it then I used a steel support from a wiper blade with the end bent to a 90 and used it to oscillate the HardBlok to level it around the block

still yet to finish building that engine so don't know how it will go

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