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Old 08-07-2007, 01:00 PM
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engine block fillers

Does anyone have information on engine-block fillers? How and when they should be used, brand, ect. Thanks 65 Impala racer

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Old 08-07-2007, 02:29 PM
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http://www.moroso.com/catalog/images/35570_isnt.pdf

Hardblok also makes a filler

Great instructions. I used their brand for a short fill in a small block street motor.

It needs to be done prior to machine work but after having the block sonic checked,magged and vatted.


EDIT... We used an air chisel fitted with a brass blunt to aid in the tamping process.

Last edited by bigbadbowtie; 08-07-2007 at 02:46 PM.
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Old 08-07-2007, 04:00 PM
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Thanks

Thanks for the info. The link you sent answered my questions. 65 Impala Racer
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Old 08-07-2007, 06:20 PM
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Following the directions in the Moroso sheet. Go to Home Depot or Lowes and get bath tub tile grout. Thats what we used in our engines and it works just fine only you don't have to pay for the name.
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Old 08-07-2007, 08:40 PM
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More questions

What happens when you have to rebuild and you hot tank the block? Will the grout come out and need replacing? 65 Impala Racer
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Old 08-08-2007, 07:29 AM
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Once you fill the bock.... its filled for life.
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Old 08-08-2007, 07:38 AM
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Quote:
Originally Posted by RPM
Following the directions in the Moroso sheet. Go to Home Depot or Lowes and get bath tub tile grout. Thats what we used in our engines and it works just fine only you don't have to pay for the name.
Does grout expand and contract at the same rate cast iron does? I know block filler does.
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Old 08-08-2007, 11:05 AM
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Quote:
Originally Posted by bigbadbowtie
Once you fill the bock.... its filled for life.
My question is: can the block be tanked later down the road when you want to freshen the engine? Will the grout stay intact?
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Old 08-08-2007, 05:41 PM
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Quote:
Originally Posted by RippinRon
Does grout expand and contract at the same rate cast iron does? I know block filler does.
I had it in a small block 400 with lots of nitrous on it. It seemed to help ring and cylinder wall life. The leak down was much better with it than with out it.

I don't know about it being hot tanked. Never had to take it that far down again.
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Old 08-08-2007, 09:59 PM
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RPM, did you fill the block completely? did the engine hold up or did you find a weak link somewhere else? How much power were you throwing at it? I know of one local racer here that gave up on factory 400 blocks after fighting with cracked cylinders on three builds but I don't think he was filling the blocks completely-only half fill and the oil temps went up he said. Now he's running an aftermarket block, no fill and no problems, 377 spinning 9500rpm.
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Old 08-08-2007, 11:03 PM
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I been thinking about using filler in my 400 sbc,I work in the flooring industry and was wondering if you used sanded or unsanded grout?
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Old 08-09-2007, 02:33 AM
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Quote:
Originally Posted by TroyBoy
I been thinking about using filler in my 400 sbc,I work in the flooring industry and was wondering if you used sanded or unsanded grout?

Embecco 885
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Old 08-09-2007, 03:30 PM
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I used a tall fill just like the Moroso instructions. Ran the car 2 years at the strip. Had a 250 shot on it. The car ran 6.0 in the 1/8.. How much power did it make don't really know for sure...It was a Chevy Monza that weighed about 2500 lbs, just guessing. Sold the car to buy some machine shop equipment.
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