[76transam76]

When I took my block to the machine shop, I told them I wanted my block filled to the bottom freeze plug. He asked if it was a strip or street car. I said it would be a street car, but will see the track. He said he would not fill it if I was him. But now I have read on this site of people doing it and not having overheating problems. I live in south MS and it gets hot down here. I would like to fill it for the strenght. What do you guys think that have filled it and ran on the streets? Could I fill it myself at the house???

Thanks
Chris

[BILTIT]

I just finished filling mine, really easy. Had a bit of clean up as i am clumsy but went well. After all the threads i have read about using it on the street i would fill it.

[66bonne]

Pontiac Dude used his block fill on my 455 when he built it. Absolutely no problem whatsoever with engine temp, car runs right at thermostat temp even in the middle of brutal Florida summer.

[RAIV55]

I have some experience with filled blocks but however not on the street. Even the full fill engines (filled to the bottom of the water pump holes) run cooler as far as water temp and cool down faster between rounds.

Something I would consider monitoring is the oil temperature. The increased temp isn't an issue with a drag car but could be on a street engine.

[Steve C.]

Ditto on the oil temperture. On the street my filled block sees 250 degrees oil temp after a few spirted jaunts. That said, its also important to note I have done no before and after oil temp testing to confirm if in fact it is because of the block fill. A oil cooler will cure the situation howvever.

[Hooter]

I filled mine and it's a street car. No issues.

[76transam76]

I really would like to fill the block, because it would make me fill more confident about the block strength. I guess it would not be a problem to run an oil cooler. What brand block fill do you guys recommend? Any certain materials?

Thanks

[Hooter]

I've use both Hard Block(I think from Moroso) and the stuff Pdude sells. I like the stuff Pdude sells as it flows a lot better.

[Bill Meyer]

Filling it yourself should be no problem. Just make sure you do it BEFORE any machine work. - Bill -

[RAIV55]

Originally Posted by 76transam76

I really would like to fill the block, because it would make me fill more confident about the block strength. I guess it would not be a problem to run an oil cooler. What brand block fill do you guys recommend? Any certain materials?

Thanks

We use non-shrink machinery grout. One bag is good for two engines and less than $20

Brock&White (701) 222-3010

[PLAY400]

I used the Dude's stuff. REAL easy to work with. Some were saying it wasn't required but since I never heard anything on the down side of filling I did it. AND since you should/must fill before boring and honing the block I felt this was not something I could have done after the motor was assembled or stepped up a peg or 2. And when I was inquiring some mentioned that their motors have been tanked after filling so I see no down side other than the extra weight.

[Brian '74]

I don't mean to hijack the thread, but I have a question too. I have a .030 400 block that was setup for TRW L2440F pistons 4.150 bore and .0025 clearance. I want to use a 455 crank cut to fit the block w/ TRW L2359F pistons that require 4.151 bore and .003 clearnace. Can I use the fill in my block if I need to rehone for the extra clearances?

[Pitch 400]

I have some Moroso part #35570 Hard Block for sale. $35 plus shipping.

[Sicbird]

Are there any real problems with filling a block to the freeze plugs once machine work is done as long as you torque down the mains and heads before you fill it? The motor is going to be about a 450 hp 428 that will be daily driven. I'm asking because my block is all ready rough bored .026" and possibly finish honed by now. I don't "have" to have it filled, but it would be nice to keep everything solid and drop my water temp a little bit too.

[RAIV55]

Originally Posted by Sicbird

Are there any real problems with filling a block to the freeze plugs once machine work is done as long as you torque down the mains and heads before you fill it? The motor is going to be about a 450 hp 428 that will be daily driven. I'm asking because my block is all ready rough bored .026" and possibly finish honed by now. I don't "have" to have it filled, but it would be nice to keep everything solid and drop my water temp a little bit too.

Like Bill Meyer mentioned previously, it's a great idea to fill the block first. We usually let the block set for several weeks, if time permits, to allow the filler to cure. I can tell you that the stuff we use will slightly change the block dimensionally as it cures.