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MAURICE BLENDHEIM · 06-10-2014, 11:46 AM

We HardBlok before any machine work, and install cylinder head as it's setting up. There has been occasions where we have filled engines that have already been machined with no problems (finish hone with torque plate). HardBlok is designed specifically and has the same expansion and contraction rates as cast iron. I've used other compounds that lose adhesion between the casting walls. This allows coolant to form rust and it puts pressure on cylinder walls as it grows to the point of eliminating clearance in areas of the bores. Had a case (in the 80's) where the cam tunnel became distorted and tore up the cam and bearings. We have been using HardBlok near 30 years with no problems. With a buddy helping, a soupy mix, a funnel, a series of coat hanger tools and a decent size dead blow hammer striking the block to assist on levelling the compound through out and a level engine stand (deck up) your set. Chase head bolt threads in block before you start. Have your cylinder head, gasket and bolts ready to install. Allow 24-36 hours per side with head in place for best setup results. Hope this helps…MB.

06-10-2014, 11:46 AM	#3
MAURICE BLENDHEIM Senior Member Join Date: Jun 2011 Location: Langley (no igloos), British Columbia, Canada Posts: 569 Likes: 311 Liked 285 Times in 87 Posts	Re: Hardblock Question We HardBlok before any machine work, and install cylinder head as it's setting up. There has been occasions where we have filled engines that have already been machined with no problems (finish hone with torque plate). HardBlok is designed specifically and has the same expansion and contraction rates as cast iron. I've used other compounds that lose adhesion between the casting walls. This allows coolant to form rust and it puts pressure on cylinder walls as it grows to the point of eliminating clearance in areas of the bores. Had a case (in the 80's) where the cam tunnel became distorted and tore up the cam and bearings. We have been using HardBlok near 30 years with no problems. With a buddy helping, a soupy mix, a funnel, a series of coat hanger tools and a decent size dead blow hammer striking the block to assist on levelling the compound through out and a level engine stand (deck up) your set. Chase head bolt threads in block before you start. Have your cylinder head, gasket and bolts ready to install. Allow 24-36 hours per side with head in place for best setup results. Hope this helps…MB.