5m-ge future engine mods?

[Mk2guy]

Ok, there could be a grounding issue. Is this on your supra. What all have you replaced? I wasn't paying attention. I would say that it could be the switch but when that happens high speed works and low speeds don't. I will have to look at a wiring diagram to help diagnose anything.

[mechrider89]

well the only things left to change would be the switch in the column or the wcu for the wipers. The WCU was making a lot of noise when my other motor stopped so that's where i'm going to try next, going to try and test resistance and if its good then it have to be the switch its self.

[CanadianBak'inSupra]

i never got to test the wiper motor i sent out. really hope you get this sorted out...

[Mk2guy]

Originally Posted by mechrider89

well the only things left to change would be the switch in the column or the wcu for the wipers. The WCU was making a lot of noise when my other motor stopped so that's where i'm going to try next, going to try and test resistance and if its good then it have to be the switch its self.

Hey, hows it going. Ya the Column switch is what I am guessing it is. To be honest I don't know what a WCU is (wiper control unit) Usually if something is making noise it should be replaced. I don't really know, but if you only have two to go then your almost there. I have replaced a few column switches and I know they go bad eventually. (a lot on American cars)

[mechrider89]

@ Canadianbak'insupra- I'm sure its fine bak'in, I'll get this sorted out soon as I'm done renovating the rents house for them.

After this next payday I should have more then enough to get my cylinder head all redone. Went and got a rough quote on what it might cost, $712 for hot tanking, valve guides, full valve job, decking, and pressure testing for cracks.
The WCU made a buzzing sound, but it stopped after I installed the new wiper motor. So that's where I'm going to go next I think, I know I can get one of those from the only scrapper that has a supra in stock.

[Mk2guy]

I would get the wiper switch too.

You must have a lot of miles on your car. My head only needed $348.00 in machine work. After all, you can get a reman for $500.00.

[Mk2guy]

Ok, once the head is clean you can search for cracks, they usually show right up. They can magnafux them to look for cracks, but not on aluminum. Your head is Aluminum so it cant be hot tanked, but they can put it in their parts cleaner.

The main thing you need is, the head cleaned($35), shaved($65), reground($200) with new valve seals in it.

You can put over sized valves in it, that is where heads can get expensive, then polishing the compustion champers (Better head distribution in the cylinder) Smooth out the exhaust ports (very important) then port match the intake by using the intake gaskets that are going on the car. (don't go beyond 90grit when porting the intake) you want the turbulent air for better fuel mixture. the exhaust should be a smooth as possible for quick evacuation.

Are you building this head so you can add a turbo later? Then you really want the chamber to be polished. (don't run more than 8.5 to 1 compression though, or else it will ping and predetonate.

[mechrider89]

does a re manufactured head come with all new components? as it sits right now I may end up just buying a valve spring compressor and pulling the valves myself. Then going to polish the valves and domes, port the intake and exhaust runners, so hopefully when I get the pacesetter header it'll be about the same diameter so I get a good flow.

As for miles well my supra has 263k kilometers which is like 165k miles, I've heard of these 5m's getting well into the 300k miles with proper maintenance before calling it quits.