So last we saw the fuel sender unit was an absolute mess. In addition to the rust the hard line leading from the sender to the feed line had at least one hole in it. I plotted the solution and ordered the new parts from Jegs. The plan was to use a -6an Bulkhead fitting and a 3/8 hose barb to -6an on the inside of the pump. Problem #1 stopped by when I got my new Walbro pump and realized two things. 1. the car already had a Walbro pump and 2. the new pump was the wrong one. The old one worked fine but I decided to swap in the new one since I had it, which meant getting busy trying to figure out how to mount it.
So this is what we started with. A rusty leaking sender unit with one properly mounted Walbro -341 pump.
Step one, cut this garbage off. I knew this was leaking anyway so it was either new sender or make this one work. I chose the latter.
This is the bulkhead fitting. It is -6an on both ends and requires a bulkhead fitting nut to hold it in place. I measured the mounting spot to drill the hole in the place of the now removed factory hard lines.
Here it is mounted in the housing. The fitting may not be air tight so I'll either get some rubber center washers or just use some RTV on it. One issue of note is that the new pump is a 342 which means the wrong one. This meant that the electrical connection was on the backside of the pump closest to the hanger. I decided I would run the electrical lines through the small hole on the hanger which you can see right behind the hose barb fitting nut. I had one problem though...
The wires would rub on that piece of metal, so I wrapped them in some small vacuum tube. This is the pump with the appropriate length of 5/16 hose attached with fuel injection clamps and the hose protecting the wires.
So since the pump was the wrong one it meant it would not line up. I simply removed the bottom hanger mount and moved it. It had two holes in it already so it almost appeared it was supposed to do this. This pulled the bottom of the pump closer to the hanger upright and kept it lined up. I did have to use the original rubber mount since the new one was clearly not correct.
Here is the sender with the pump mounted. With everything reconfigured you can see it lines up pretty well which also means the filter at the bottom will sit flat. Without doing this this pump probably still would have mounted up but the filter would have been at a pretty steep angle missing the last inch or two in the bottom of the tank.
This is the completed assembly. I used rust convertor on the top to get it back into decent shape and held the pump on with the supplied zip tie plus an additional one. I probably should put the rubber boot thing on the pump for some sound isolation however.
This is just another of the completed pump. You can see how the wires got fed through the rear hole and are protected by the vacuum line. Even routing the wires this way there were no hard bends to get the wires to their normal attachment points.
Onto the head...
Here is the head I got back from the machine shop. Two of the seats were below tolerance so I had to get new seats pressed in. They cleaned the stock valves for me, 3 angle grind on all the seats and valves, dipped the head, pressed in the new valve guides, and put the new valve seals on.
I didn't bother to take any pictures of the head going back together since it is simply reverse of dissassembly which I already covered. I did a light hand port job on both sides of the head to smooth out the casting marks and finished it with some 360 grit sandpaper, again by hand. The exhaust studs were replaced with some special ones of unknown origin but they have copper nuts and a small 6 point to torque them down with.
Intake side. Same story. I studded every hole on the intake side as well since we all know studs are stronger than bolts right? They are. Google it if you want to know exactly why.
And finished. One point to note is that the Factory Evo springs are beehive so the cap is smaller than the 1G spring top. The spring compressor I built fit the 1G caps really well but barely fit the Evo caps. I had to be careful to keep it lined up while I compressed them or they would cock off to one side. Even with my faulty tool, it only took me about an hour to put this back together. Cam caps torqued down to 14 lbs, new cam seals, light coat of RTV, lots of assembly lube. If you are new at rebuilding a head and do it yourself, be sure to get assembly lube on the valve stem itself especially near the top since it will be going through the valve seal which is a squeeze fit. Not lubing this will make it harder to get through and could cause problems.
Now I am waiting on 2 of my new Evo piston ring sets to arrive and getting everything else ready for the motor to go i. I got the brake booster/MC back into place after some refinishing.
Here it is.
Updates all this week.
/brox