okay so i pulled the heads off my lt1 i didnt notice the steam line in the back of the heads and creased the line.
the only place i have found the line is at gm for 140$ i was gonna try and make the line with brass fittings and rubber hose or maybe even bypass?
any input would be helpful. thank

 

I see them on ebay a lot and in the classified sections here and on ls1tech. Might wanna try those if you haven't.

 

You CANNOT BY PASS the coolant line,go with your frist choice and use brass fittings and rubber hose or use -6 fittings and braided line.

 

okay, does anyone know what the size is of the holes? someone told me it was pipe thread?
how much pressure is the line under?

 

I agree with this. The cross over tube is there for a reason. I think I have an extra one at home, ill check when I get there. Ill also check to see what size the holes are too. Not sure about the pressure tho.

 

thanks transporter9033. im realy wondering on the size of them holes and to know if i have to replace with something with pipe thread of not

 

Ok, keep in mind these measurements are going to be to the edge of the threads.
I measured the inside diameter of the steam tube holes and came up with. 440" on a set of mitutoyo digital calipers. I also measured a few banjo bolts (the correct bolts for the steam tube) for a reference and got .5035" to .5040". Also, these are tapped straight thread, not a NPT.

I do have an extra cross over tube if interested too.

Hope this helps.

 

I bought my replacement at the junk yard. $10 and I am happy with it. Make sure you get new seals though.

 

1/4" pipe threads. The holes in the head are not tapered, but people use tapered fittings in them all the time to make up their own hose solution.

Example

 

so the treads are npt 1/4 threads?
is that considered pipe thread?

 

Yes, they are. N(ational) P(ipe) T(hread)
Aeroquip may have STRAIGHT pipe thread fittings for aircraft that use an O-ring under the hex flange to seal it if you don't want to heavily dope a tapered fitting's threads.

 

Its actually National Pipe Taper, but who's counting lol. Also with it only being 1/4", the difference in the amount of thread sealant you would have to use would be insignificant.

 

how much thread sealant would you guy recommend? and what kind

 

ARP thread sealer from Jegs or Summit, or Permatex PST from autozone will work. Just put enough on to fill the groove of the threads and you will be fine.