head gaskets cut

**seansz28** · 03-13-2007 04:27 PM

my friend is building up a big block and he was installing the heads and he noticed the new head gaskets blocked a water hole so he cut the hole out of the new gasket! is he going to run into any problems? does he need to get new gaskets again

**pat mccarthy** · 03-13-2007 04:41 PM

need to see what he cut and where i never in all my years of building big blocks ever had to cut any holes in the head gaskets. i haved drill out the deck for more water but thats is all

**pat mccarthy** · 03-13-2007 05:23 PM

did you put the mark 4 head gaskets on a mark 5/6??????? them bocks have many holes in the deck????

**seansz28** · 03-13-2007 05:23 PM

he cut it on the front side where there is a water hole that is a funny shaped triangle

**seansz28** · 03-13-2007 05:26 PM

the old gaskets had a hole there and he just cut it with a pocket knife i was wandering if it would hurt them to cut it

**pat mccarthy** · 03-13-2007 05:41 PM

a lot of time gasket do have smaller holes in them .this is to keep the water slowed down in spots and put big holes in them were whey want it to move faster thru the head. i will not tell you any thing with out seeing it the head gasket companies spend money on making them fit out of the box so i am thinking he should of kept is pocket knife in his pocket less he work in R@D for fel-pro?

**seansz28** · 03-13-2007 07:14 PM

he cut the hole at the water passage i was wandering if cutting the gasket material would have any adverse effects on the gasket seal, the hole he cut is smaller than the open hole in the head and block, there was a hole in this location on the old gaskets

**pat mccarthy** · 03-13-2007 07:17 PM

i think i know where you are taking about i would like to see it still if you can not post a photo then i would say just buy a new gasket

**seansz28** · 03-13-2007 07:56 PM

a photo of where he cut the hole

**seansz28** · 03-13-2007 07:59 PM

fel-8180pt-2.jpg on his gasket there was no hole here so he made his own

**pat mccarthy** · 03-13-2007 08:16 PM

what year is the big block? mark 4 1965 up to 80s mark 5 1985?? and mark6 1990 ?

**seansz28** · 03-13-2007 08:27 PM

late 70's big block

**pat mccarthy** · 03-13-2007 08:37 PM

i would not think it wound hurt?(but still did not see the real deal) he should not needed to do it who is the maker of the gaskets did he try some other maker are the gaskets for a mark 4? i am thinking there mark5/6

**seansz28** · 03-13-2007 08:47 PM

i was just wondering if it would hurt anything to run it like that, i wouldnt think it would

**pat mccarthy** · 03-13-2007 08:51 PM

that is not really the point . the front of the mark 5/6 block have water hole on both ends they block one end to make the water run thru the back of the head if they are mark 5/6 they are not made to really fit that block

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