The tube is just there to keep the sensor away from the heat, there is no restriction in the system. Just so you know, the 7.3ps sensor goes up to about 40psi, the 6.0ps and 6.4ps go to about 80psi.
For some reason rockauto doesn’t show the return line under the 6.9L or 7.3L engine option, but if you look under a gasser engine it shows the cooler line which hasn’t changed since 1983.
It appears that the vans never got the cooler line though they should of had the option in my opinion...
You could swap out your brake switch from a superduty 99-2010, they bolt right on and have an extra wire for ground. When the pedal is at rest it grounds out the brake light circuit and when you push the pedal it switches 12v to the brake lights. With this switch you could have no brake lights...
I swapped the mounting plate and rod over from my 90s unit to the 08 unit, one can easily modify the 08 mounting plate and shorten the pushrod to make it work.
I had a 460 zf5 behind my engine and absolutely hated it, first was useless, 2nd was a bit tall to start off in and having to rev it up to 2500 rpm so you didn’t lug it in the next gear sucked, if I shifted at 2k it would be around 1K in the next gear. I only dd but if I towed it would be even...
2005 is when they went with the 1-1/2” master cylinder, I don’t believe it will fit on a 2004 hydroboost though. I know 1-1/2” mc doesn’t fit the 90s hydroboost and is why I bought an 08 hydroboost.
I’ve been running an 08 hydroboost and MC for years now, the 08 MC uses a 1-1/2” bore instead of the 1-5/16” bore on the 90s truck. The bigger MC won’t fit the older hydroboost.
Hopefully more soon, currently swapping out the dead zf5 for a 4r100 auto and doing a bunch of wiring I haven’t had time/ambition to do, hopefully I’ll have an update about the custom gauges soon
Going through my factory ats 093 turbo and there’s a few things that look odd that I’m hoping the turbo rebuild guys could help with.
First is the center section on the exhaust side where an oil sealing ring runs, is it supposed to have a grove in it?
Second is the oil sealing ring has wear...
Here is the tank and sender in my truck currently, the other tank is my brothers that he put in a gas truck, we took a gas sending unit and just straightened the lines till it touched the bottom.
That front plastic tank was stock on some trucks, good luck finding a sending unit as this tank wasn’t very common so the aftermarket probably doesn’t make it.
It isn’t uncommon for the apply servo seal to go rock hard and loose a piece of itself, the servo is what applies the band for 2nd gear, you can pop the cover off and check it out without opening the trans.
The low side needs to drop down to around 20-25psi before the compressor kicks out, it should cycle on/off when running. What’s your high side pressure?
When the key is turned to the start position you should have the engine temp light and e-brake light come on till the key is released to the run position. This is a prove out for those bulbs.
Being a 89 it suffers from firewall flex and cracking if someone hasn’t put in the reinforcement plate, I would get some one to actuate the clutch while you watch the firewall and see if it flex’s a bunch, if it doesn’t you may just have a worn out switch. You can buy a new switch or if you...
I would pull the belt off and check the vacuum pump pulley to see if it’s worn out and causing the belt to track funny, I would also see if the power steering pulley is pressed all the way on.
Here’s a picture of my setup for reference, it’s missing the vacuum pump.
The over temperature sensor should kick on at 248f (120c) if it even works, I had 3-4 of them that never worked. Have you double checked your gauge to make sure it’s correct?
I really like the 6.4 fan clutch, it’s nice that you can tie in the AC, trans temp and intercooler and you can turn it...
The phenolic piston doesn’t distort its shape from what I have found, what usually happens is rust forms between the dust boot and the piston seal and seizes the piston to cylinder. I’ve had very good results buying new seal kits and pistons and redoing them myself, you have to get all the rust...
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