Ever heard of using " Hard Blok" to repair a severe crack cam tunnel in a 427?

[Georges C.]

Re: Ever heard of using " Hard Blok" to repair a severe crack cam tunnel in a 427?

Thanks to all for the comments. Here was my issue. This is an original car that I've owned 38 years that did not have an original motor. I knew both previous owners. I purchased a "good engine" bored .060 over from a classic engine re-saler that had 'been manafluxed', but apparently not water pressure tested. When I received the engine it had a scored piston wall and had to be bored to .070 over and a sleeve inserted into the scored wall. This engine was built and the car assembled to NCRS standards. Two weeks ago during a first start test, the radiator fill was not successful. Intake manifold removal showed the water leaking from the water jacket next to the second cam bearing.
The engine re-saler said it could be 'hard blocked'. After researching the company web site, it states it is for structural strengthening in race cars; therefore I contacted the company and was told "No" it was not designed for my repair.

[Patrick B.]

Re: Ever heard of using " Hard Blok" to repair a severe crack cam tunnel in a 427?

Since you have already paid for boring, sleeving and custom pistons, you have a stake is seeing if this block can be fixed correctly. Perhaps the damage is not severe if it did not show up in magnafluxing and the shop doing the boring and sleeving did not notice it. You need to disassemble the block and pressure test it to see the nature of the leak. If it cannot be fixed by furnace brazing or stitching or if you do not want to continue with it, the seller should at least refund your purchase and take the block back.

[Chris S.]

Re: Ever heard of using " Hard Blok" to repair a severe crack cam tunnel in a 427?

Better check the oil temp because you've been driving with 340 degree oil.
How long have you been driving that way?
Put a gauge in temporarily, take the car on the highway, and report back what the oil temp is after a few minutes.
If you have been using dino oil, then your pistons and rings are probably badly "coked" if you've been driving this way for awhile.
Thank me later..
Does the NCRS let you install an oil cooler? Hahahahahahahahahaha!

JOE - ENOUGH !!!!!!!!!!!!!!!!!
I answered a straight forward question
I answered with a honest answer
I have been in the auto industry for over 30 years
I drag raced a street car for years that ran 10.00 consistently.
I am very familiar with the product
I know what the pros and cons of this product are
I am also familar with the other process of repairing cracks in a block. (pinning etc....)
As I said above - I am sure there is a min amount that can be used with no issues
Can you fill a block and run it on the street - No
Can you put a little in and solve a problem - YES
We that being said - My block has 2 inches of product in the water jacket to solve a VERY severe crack issue that was repaired previously poorly
I saved a old block that no one would try to fix.
A date coded - original block - an expensive block to try and replace.
This is NOT a race car
This is NOT a road race car
This car is not driven - it has never been on the road.
It is a trailer queen - for now and I dont see any future problems
and NO it is not for sale !!!!!!!!!!!!!!
I thought NCRS and this board is about sharing experiences, helping other fellow Corvette and being open to others ideas, thoughts, and experiences.
If you research my posts - you will see I always offer help and tips and have been an advocate for our sport

If you feel the need to discuss further - let me know and we can get a Moderator involved.
Thank you
Chris K Sherman Sr

[Joe C.]

Re: Ever heard of using " Hard Blok" to repair a severe crack cam tunnel in a 427?

JOE - ENOUGH !!!!!!!!!!!!!!!!!
I answered a straight forward question
I answered with a honest answer
I have been in the auto industry for over 30 years
I drag raced a street car for years that ran 10.00 consistently.
I am very familiar with the product
I know what the pros and cons of this product are
I am also familar with the other process of repairing cracks in a block. (pinning etc....)
As I said above - I am sure there is a min amount that can be used with no issues
Can you fill a block and run it on the street - No
Can you put a little in and solve a problem - YES
We that being said - My block has 2 inches of product in the water jacket to solve a VERY severe crack issue that was repaired previously poorly
I saved a old block that no one would try to fix.
A date coded - original block - an expensive block to try and replace.
This is NOT a race car
This is NOT a road race car
This car is not driven - it has never been on the road.
It is a trailer queen - for now and I dont see any future problems
and NO it is not for sale !!!!!!!!!!!!!!
I thought NCRS and this board is about sharing experiences, helping other fellow Corvette and being open to others ideas, thoughts, and experiences.
If you research my posts - you will see I always offer help and tips and have been an advocate for our sport

If you feel the need to discuss further - let me know and we can get a Moderator involved.
Thank you
Chris K Sherman Sr

Well, now you finally gave 2 key pieces of information, without which, your posts were very misleading:
1. The amount of product you poured into the engine block.
2. The fact that your car is a trailer queen.

Sincerely,
Mr. Joseph P. Ciaravino P.E.