Partial Hard Fill - Block

[Rtspeeddemon]

Ken and others on here that have partially filled there block with hard fill. How far up roughly did you go? 1/4, 1/3 1/2?

[Lederip]

Ken and others on here that have partially filled there block with hard fill. How far up roughly did you go? 1/4, 1/3 1/2?

Top of the freeze plugs. No oil cooler, Oil temps never go over 230. Just run a good synthetic and you will be ok.

[dakota-boy]

what benefits are there to doing this? do you do it with the block in the truck?

[ADakotaRTGuy]

Ken and others on here that have partially filled there block with hard fill. How far up roughly did you go? 1/4, 1/3 1/2?

That is what my engine builder is doing, up to the freeze plugs.

[bad360rt]

what benefits are there to doing this? do you do it with the block in the truck?

Strengthens the block. You're filling the water passages with a cement like compound called hard blok (in the old days they actually used cement). I guess you could do it with the block in the truck, not sure, but it's usually done with the block out of the truck when it gets built.

[dakota-boy]

Strengthens the block. You're filling the water passages with a cement like compound called hard blok (in the old days they actually used cement). I guess you could do it with the block in the truck, not sure, but it's usually done with the block out of the truck when it gets built.

does it not effect cooling? harder to keep cool? idk, just trying to learn :)

[Lederip]

does it not effect cooling? harder to keep cool? idk, just trying to learn :)


I run a stock rad and only the stock 2000 elec fan.
I had the truck on Atlanta motor speedway doing 100+ mph laps and couple 130mph spurts down the straight aways.
The Nats at the St Louis dragway were in the 100 degree temps, I heard the track temp was over 120. I made over 15 runs that day and never exceeded a 195 degree water temp.
The main worry is oil temps.
You need to run a oil temp sensor.
At cruising speeds (3500rpms) on a highway there is no problem with oil temps. When you thrash it you need to watch the oil temp and back off a bit when its in the 250 range. I may add an oil cooler someday.

[Rtspeeddemon]

I run a stock rad and only the stock 2000 elec fan.
I had the truck on Atlanta motor speedway doing 100+ mph laps and couple 130mph spurts down the straight aways.
The Nats at the St Louis dragway were in the 100 degree temps, I heard the track temp was over 120. I made over 15 runs that day and never exceeded a 195 degree water temp.
The main worry is oil temps.
You need to run a oil temp sensor.
At cruising speeds (3500rpms) on a highway there is no problem with oil temps. When you thrash it you need to watch the oil temp and back off a bit when its in the 250 range. I may add an oil cooler someday.

Geezuz now I need an oil temp guage as well.

[dakfink]

Geezuz now I need an oil temp guage as well.

Actually an Oil Temp gauges is something that all cars should have.

The Temp of the oil is a better indicator of what is going on inside than the water.