Cylinder Head Epoxy
Moderator: Team
epoxy pc-7
I have had good luck with PC-7 AB epoxy. I have a set of heads that have had the epoxy in it for 8-9 years with no problems. Anybody else tried it. Gregg Davis (Intake Manifold builder)turn me on to it about 10 yaers ago.
Mark
Mark
I tried a test with the goodson brand a+b epoxy a fiew days ago. I put some on the floor of 2 intake ports. Shaped it out, heated the head to help quicken the hardening process. Then let it sit overnight. On wed I put the head in my heated soak tank and forgot about it till this morning. Well the head came out clean as usual but the epoxy was still there hard as a rock. I tried pressure washing the head next and again the epoxy stayed strong.
Anyother tests anyone can think of.
Anyother tests anyone can think of.
Sorry if I ask alot of questions, but you never stop learning if you ask questions
good morning gents
Do you guys feel that the splash zone is OK to build-up a "wing" before and after the valve guide boss on a Intake port?
I have a port that indicates it wants this.
I was looking at a old winston west head a few weeks ago and this has a pink colored wing built up behind the boss. This head had to be maybe 8 years old at least - I dont know what kind of epoxy it was - but it is still there.
the spash zone is green - correct?
thanks in advance
Jim
Do you guys feel that the splash zone is OK to build-up a "wing" before and after the valve guide boss on a Intake port?
I have a port that indicates it wants this.
I was looking at a old winston west head a few weeks ago and this has a pink colored wing built up behind the boss. This head had to be maybe 8 years old at least - I dont know what kind of epoxy it was - but it is still there.
the spash zone is green - correct?
thanks in advance
Jim
I've done wings with splash-zone and the A-B stick types with no issues to date. The Goodson brand mentioned earlier appears to be repackaged spash-zone. Not positive, but it looks and smwlls and is colored exactly the same. I;ve seen that pinkish colored epoxy too. I don't have a clue what it is, other than it's good stuff.talon wrote:good morning gents
Do you guys feel that the splash zone is OK to build-up a "wing" before and after the valve guide boss on a Intake port?
I have a port that indicates it wants this.
I was looking at a old winston west head a few weeks ago and this has a pink colored wing built up behind the boss. This head had to be maybe 8 years old at least - I dont know what kind of epoxy it was - but it is still there.
the spash zone is green - correct?
thanks in advance
Jim
Devcon epoxies work well also. If you do a search on google, for Devcon epoxy, their websight comes up. They have a whole bunch of different stuff. They have stuff specificaly formulated for various types of metal. Its pretty amazing some of the applications they use it in. For one, they use it underwater, between maintenance schedules, at nuclear power plants, to fix cracks in the reactor!! So, if it works there, it has to work on a cylinder head, lol. They also have porable stuff, that they use to re-build manufacturing machines, where extrememly heavy parts rub on each other, instead of taking the whole machine apart, to send it off to have it re-done, its a 24 hour job. Its pretty interesting. I was given some of the Devcon aluminumn and steel epoxies to try, and it seems pretty bullet proof.
Frank
Advanced Performance
www.get-ap.com
Frank
Advanced Performance
www.get-ap.com
I have never used splashzone on heads but have used it for years on my boats.I keep a 5 gal bucket 1/2 full of water,I make a ball with the amount I think I will use and mix it in water untill I get the consistant color and then form where I want it.As long as your hands are wet it is easy to form.Tom
Jack, as far as I can tell, they work just as well with iron. I patched up one of those "oops" at the push-rod with no problems. I've also fixed one that made it's way into water. On that one I was able to get to both sides of the hole and clean boths sides and "rivet" the epoxy. I'm not confident on how just attempting to plug a hole into water may turn out.
I hope this isn't a dumb question, but is it necessary or worthwhile to use this epoxy to fill in the bottom of the hole at the top of the port where the rocker studs go? I was surprised on my Brodix Track 1 heads that a couple of the the tapped rocker stud holes go all the way through into the port. Obviously, the studs need sealer, but is there any airflow impact if the bottoms of the holes aren't filled in? The top of the port would seem to have the highest velocity, and the hole would seem to interrupt the flow at a minimum...just doesn't seem to be the best it could be...
Thanks,
~~fred
Thanks,
~~fred
Fred,I hope this isn't a dumb question, but is it necessary or worthwhile to use this epoxy to fill in the bottom of the hole at the top of the port where the rocker studs go? I was surprised on my Brodix Track 1 heads that a couple of the the tapped rocker stud holes go all the way through into the port. Obviously, the studs need sealer, but is there any airflow impact if the bottoms of the holes aren't filled in? The top of the port would seem to have the highest velocity, and the hole would seem to interrupt the flow at a minimum...just doesn't seem to be the best it could be...
Thanks,
~~fred
It is not necessary to fill those in.
Most of your more serious BB Style heads will have them and it does not seem to be slowing down anyone.
You do want your rocker stud or rocker stand bolts to be threaded as deep as possible in the aluminum or the heli-coiled aluminum. It jsy so happens that the palcement needed for the rocker stud or stand bolt is above the intake ports in many instances.
Also exhaust port openings that get in the way of head hold down bolts or studs do not seem to have any negative effects either.
Hope this helps some.
Ed