weekend project

[jon_570]

one weekend i want to take off some parts to my motor and degrease and clean them..then paint them with high heat engine enamel..i want to do the valve covers in an alluminum look and same with the intake manifold. and do the mid and bottom of the block a gloss black. i am not taking the motor out but am gonna try to tape everything up. the only problem if the intake manifold..i have to take the fuel rail and such off..how do i depressurize the fuel system???and also when i pull the injectors out do they just pull out or is there a special tool to get them out. thanks for any help in advance

[toyotaspeed90]

remove the parts from the motor if you want them to look decently painted......

to keep fuel from going through the rail once removed, just keep the key OFF and depressurize the tank (loosen the gas cap.... not doing so can cause the gas to flow out slowly)

once you remove the 3 12mm bolts (and make sure you don't lose the black spacers) the fuel rail will come out (if lines are removed) and the injectors just sit in there.... while out, i would reccommend replacing the injector seals.... they're cheap and a good idea to do if you've never done them and/or going to pull them out anyways

[jon_570]

so..unhook the battery, loosen gas cap. and unbolt it..simple as that????thanks...i wont be doing this for a few weeks until i get my job situation rolling again...but im slowly taking small parts off the car and painting them so i can do the big parts in one huge step

[Flashmn]

Loosening the gascap doesnt depressurize the system, the pressure system is after the pump, to depressurize the system you have to just open a bolt from the fuel filter and put on a rag, so fuel wont spray everywhere.

As for painting the parts with them intact, thats gonna look like crap.

[stubborn1]

Originally Posted by jon_570

one weekend i want to take off some parts to my motor and degrease and clean them..then paint them with high heat engine enamel..i want to do the valve covers in an alluminum look and same with the intake manifold. and do the mid and bottom of the block a gloss black. i am not taking the motor out but am gonna try to tape everything up. the only problem if the intake manifold..i have to take the fuel rail and such off..how do i depressurize the fuel system???and also when i pull the injectors out do they just pull out or is there a special tool to get them out. thanks for any help in advance

I would pull the fuel pump fuse, start the car to burn off remaining pressurized fuel, then disassemble. It's worked for me in the past.

Also - I'm seconding the recommendation to replace the injector o-rings. I tried to reuse once and ended up coating the intake manifold with fuel on a warm engine. Luckily no fire. Coat the o-rings in a little clean motor oil to ease putting them back in the fuel rail.

[Flashmn]

I would pull the fuel pump fuse, start the car to burn off remaining pressurized fuel, then disassemble. It's worked for me in the past.

Thats not gonna work in a fuel injected car.. a carb car sure.

[toyotaspeed90]

Originally Posted by Flashmn

Loosening the gascap doesnt depressurize the system, the pressure system is after the pump, to depressurize the system you have to just open a bolt from the fuel filter and put on a rag, so fuel wont spray everywhere.

As for painting the parts with them intact, thats gonna look like crap.

riiight..... that's why when i did my very first swap in the ae92 i lost over a gallon of gas in a week because we didn't pull the gas cap after we had pulled the lines..... pulled the gas cap and it stopped....

and that's also why when you run low on gas, then go to fill up there's pressure behind the cap?

i didn't say it would depressurize the fuel rail.... it will depressurize the tank.... the tank, if pressurized, WILL push fuel through the pump and lines in an EFI car.....

[stubborn1]

Originally Posted by Flashmn

Thats not gonna work in a fuel injected car.. a carb car sure.

I think you got it backwards. Pulling the fuse in a EFI car causes the fuel pump not to kick in. Same effect as pulling the relay, but the fuse is usually easier to access. The pump doesn't kick in, remaining pressurized fuel gets burnt off as car runs for a sec or two after you start it.

I've always done it this way and never gotten a face full of fuel on EFI cars.

[Flashmn]

but it wont inject fuel, thus it wont spray very long, as the pressure goes down very fast, you'll still have some pressure in the system. Oh I've never got my face sprayed from an EFI system either, because I've always put a rag over the bolt at the filter, then take a spanner and loosen it.

toyotaspeed90, yeah? well I never got pressure in my fuel tank, but then again, my fueltanks have breathers that work, plus the fact that the fuel pump creates pressure and before you can say "oh but theres a returnline", there really isnt pressure in that enough to overcome the breather system and create pressure. But if thats your belief so be it, I'm not gonna lose my sleep over it.

and that's also why when you run low on gas, then go to fill up there's pressure behind the cap? <- I've always percieved it as vacuum.

[punter]

Originally Posted by Flashmn

and that's also why when you run low on gas, then go to fill up there's pressure behind the cap? <- I've always percieved it as vacuum.

I also believe thats vacuum, how could it be anything else.