Joined
·
1,378 Posts
My Brodix IK200 heads don't have the holes punched through in locations 4 & 6 in the pic. Is anyone elses IK heads like this?
![]()
Brodix IK head water passages
1 - 9 of 9 Posts
Joined
·
2,739 Posts
Look at a head gasket, you might discover that there would be basically zero flow there anyway.
There's pretty much no heat there... the hottest place in the head, BY FAR, is #2. About 40% of the total water flow needs to go there. About 20% each needs to go through the holes in the corners next to those exhaust ports. The remaining 20% can get split up among the entire rest of the passages. Newer head gaskets usually have 3 large holes at 2, 1 large hole at each of the places I just mentioned, and very small holes at all of the other places.
In fact, if #2 obstructs any of the 3 holes in your gaskets, you should enlarge it. But don't worry about 4, 5, & 6. They don't really do anything except "leak" water from the cold side of the system to the hot side, bypassing the place where heat flows into the system (exh ports), and maybe bleed off air & steam bubbles.
There's pretty much no heat there... the hottest place in the head, BY FAR, is #2. About 40% of the total water flow needs to go there. About 20% each needs to go through the holes in the corners next to those exhaust ports. The remaining 20% can get split up among the entire rest of the passages. Newer head gaskets usually have 3 large holes at 2, 1 large hole at each of the places I just mentioned, and very small holes at all of the other places.
In fact, if #2 obstructs any of the 3 holes in your gaskets, you should enlarge it. But don't worry about 4, 5, & 6. They don't really do anything except "leak" water from the cold side of the system to the hot side, bypassing the place where heat flows into the system (exh ports), and maybe bleed off air & steam bubbles.
Joined
·
1,378 Posts
I know what you're saying about the water passages. I'm having cooling trouble with these heads and have been for awhile. See this post http://www.chevelles.com/forums/showthread.php?t=205025
I've talked with brodix about the heads and they had me enlarge holes 1 & 3 to 7/16" in the gasket. (Felpro 1003) The middle hole is already big. It still does it. Guess the only thing left is to drill and tap the intake for bypass hoses.
^^^Forgot to add here that I changed the heads from Edelbrock RPM to Brodix IK.
I've talked with brodix about the heads and they had me enlarge holes 1 & 3 to 7/16" in the gasket. (Felpro 1003) The middle hole is already big. It still does it. Guess the only thing left is to drill and tap the intake for bypass hoses.
Joined
·
2,739 Posts
I don't know why it would suddenly seem to need a different thermostat. That doesn't make alot of sense, unless something has failed in the meantime, such as the pump. Not impossible.
But as far as pump pressure... you could measure that at basically any cooling system plug between the pump and the stat; the hot side heater hose fitting (in the intake, not the one in the pump), plugs in the heads themselves, etc. A gauge that would measure fuel pressure would do. Or, you could use a marine one, such as outboard motors sometimes have.
But as far as pump pressure... you could measure that at basically any cooling system plug between the pump and the stat; the hot side heater hose fitting (in the intake, not the one in the pump), plugs in the heads themselves, etc. A gauge that would measure fuel pressure would do. Or, you could use a marine one, such as outboard motors sometimes have.
Joined
·
2,248 Posts
Ray,
Are you running a heater in your car? I had problems like this with my El Camino when I first installed the 383. I had the heater ports plugged because I was running no heater. Some one suggested to me to run a hose from the water pump to the intake manifold which would simulate the heater core path of flow. It cured my weird temp readings on my gauge.
Your answer from Brodix puzzles me?
Are you running a heater in your car? I had problems like this with my El Camino when I first installed the 383. I had the heater ports plugged because I was running no heater. Some one suggested to me to run a hose from the water pump to the intake manifold which would simulate the heater core path of flow. It cured my weird temp readings on my gauge.
Your answer from Brodix puzzles me?
Joined
·
1,378 Posts
Chris,
Yes, I'm running a heater and it's hooked up.
I don't know what's wrong with these heads and I've talked to Brodix about it again. They redesigned the passages in the heads and my heads are right without the holes drilled. It's like the heads are getting "hot spots" in them and that's what's swinging my temp gage all over the place.
Yes, I'm running a heater and it's hooked up.
I don't know what's wrong with these heads and I've talked to Brodix about it again. They redesigned the passages in the heads and my heads are right without the holes drilled. It's like the heads are getting "hot spots" in them and that's what's swinging my temp gage all over the place.
Joined
·
5,710 Posts
i have just around 5k miles on my IK180 heads, and have never had one over heating issue. that also includes 13-4 track passes, and MANY wot runs.
stock water pump., 180* t-stat, BOP brass 3-4 core rad.
![]()
![]()
aaron
stock water pump., 180* t-stat, BOP brass 3-4 core rad.
aaron
Joined
·
1,378 Posts
i have just around 5k miles on my IK180 heads, and have never had one over heating issue. that also includes 13-4 track passes, and MANY wot runs.
stock water pump., 180* t-stat, BOP brass 3-4 core rad.
![]()
![]()
aaron
Thanks Aaron,
Your heads are exactly like mine. The water ports are not drilled through. Since you don't have cooling problems...or crazy gauge action, I guess that's not the problem. My problem didn't start until I changed heads so I don't know where else to look. I put a stock water pump on and it did the same thing, so.... I'm lost.
Hopefully adding the water bypass hoses will fix the problem.
Ray
1 - 9 of 9 Posts
