Subscribe to watch Mike finish this engine build and re-install it into his 1969 Pontiac GTO Restomod, in his home garage! “How to install AN Fittings, and keep your heads cool”, is Part 17 of this Pontiac 400/455 rebuild, but can be applied to all motor types. This trick allows more water flow through the drivers side head, helping to keep your Pontiac engine cool! Army/Navy fittings were originally designed for aircraft, back in the day. Now you too can improve your car plumbing with the tips and tricks shown in this video. Have fun!
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This is a very thorough description of what to do, how to do it, and what to watch out for. Mike is in the middle of rebuilding his Pontiac 400, which is now a Butler Performance 467, because a Roller Lifter Broke! (see link below). Enjoy!
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An example of a Fragola Series 2000 Hose end fitting, from Summit. All of the hose ends and hose I used in this video are the same manufacturer and series. https://www.summitracing.com/parts/fra-229006-bl
Here’s the original Hydraulic Roller Lifter Fail Inspection, and process:
https://youtu.be/y_iPx4CiMTg
Here’s the Official Part 1, where Mike starts the preparation of Engine removal
https://youtu.be/VWt2QxXOgOE
Enjoy, and ask questions by leaving a comment below… See you on the other side!
See the build pics, before and after, at www.fastmontysgarage.com
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#PontiacV8 #EngineRebuild #HomeMechanic
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Good afternoon. Enjoy your videos. I have a 66 GTO with a 389. I currently have the Barry Grant's SixShooter tri power. I am planning to purchase the Ames alumni tri power manifold. Holley has the Rochester to Demon carburetor adapters. I want to devours the water passage from the main manifold. The new manifold has t thermostatic vacuum port mounted in the front of the water passage. I can't sen a pic. Anyway my GTO does not have AC. The water out of the rear passenger side of the head goes directly into the heater core. What is your option if I run an AN hose directly from the fitting on the manifold to the rear of the drivers side head?
Do you have the part number for the an Fittings for the heads
Man! …now i understand why my car were over heat.. thank you
Great videos !
Your cooling trick is outstanding !
Thanks !
Hi, what exact heater hose fittings you use on those heads?
Ok I believe I got that. Since I am bypassing the heater core can I run this hose (from drivers rear head) to the (Edelbrock ) Intake manifold or can I run it directly to the (Tin Indian) timing chain cover? (where the heater core return line would go)
Thanks for all of your help. I'm an In-Line Tube paint, Edelbrock. Remflex, M/E Wagner, Canton Oil Pan user. Good Stuff
I am wanting to do the same set up as you have in this video. I do not quite understand what "the standard nipple with restrictor" means. It appears that your AN fittings are directly mounted into your heads. Did you have your heads tapped? I have not installed my heads yet so it would not be an issue for me to get that done. I do appreciate your series and don't want this to leak either.
I am seeing AN to NPT fitting or AN to an O-ring style AN920-10-08A but I am not sure if that is what you are using. Are the Pontiac holes where the freeze plug goes threaded? I do not have a heater so I am going to Y to the front of the manifold. Can I use one of the predrilled holes on either side of the thermostat or do I have to drill and weld the fitting in the exact spot that you did yours?
I wonder if you could run the line back to the crossover under the intake manifold? I am sure there would be some fitment/access issues if you needed to remove the crossover during maintenance though. Loving the channel.
Hey man great vids, I have a question just to clarify things, I have a 74 Pontiac 400 and I wanna do this to keep it cool because I’m in florida,I never use the heat so where exactly would I find the part of the water pump to route this into, also could I get a link for the color and primer you used on your engine because that is the most beautiful block I’ve ever seen
This video gives some great advice! Thank you…. I’m about to a 69 Firebird rebuild and I will definitely be using these fittings and your suggestions for cooling.
Really enjoy your videos you definitely are a good teacher, I like that setup with the fittings I might have to do that on my 9c1 caprice cause it has a funky junction behind the engine on the pass side
I know this vid is a year old, but do you remember the heater hose part numbers you used originally? Going to use the hose for iron heads
Awesome videos! I might have missed something… I have 69 Firebird w/ 76 Trans AM 455HO motor (likely mostly stock) installed. Edelbrock EFI System installed. Now… I added a water nipple on the driver's head, machined a manifold for nice hose routing. Test drive and my temps are up higher than before. From my reading, it looks like water that goes through the heater core, wether it be stock from passenger head or modified from both heads, returns to the front of the engine rather than through the radiator thus circulating hoter water (we're currently in the 100's degree weather here). My guess is not running the heater on hot days I should close off any heater core feeds (future electric valve) so that all water circulates through my radiater? Sounds like the engineers after 1960 didn't make the best design change in water flow? I'm sure I missed something… I've done EVERYTHING for cooling now at this point. Adding the driver's head to the heater after watching your video was the last 'bonus' attempt in hoping for cooler temps. Sorry for the long explanation here on the related post as I couldn't find a different contact method unless I joined twitter? Thanks much and Nice car!
Hey how’s it going. I been watching your videos on rebuilding your motor. I just blow my head gasket on my Pontiac 400 so I’m replacing it now and I want to add the AN fittings and hose to mines. My factory heads are not tapped tho.
Omg bro if I'd of thought about this for cooling my 73 motor would still be good and I wouldn't of been a stoopid hooman and had to switch to my 68 motor
Hey thanks for the quick response that’s awesome idea you had a great video problem is I have standard stock heads on mine and those are not threaded any suggestions on what to do I really appreciate it thanks Dan
If I wanted to do this, instead of routing the coolant crossover to the heater core, where would I connect it at the timing cover/water pump?