bryy

Hello all trying to finish up a top end rebuild and when I took everything apart I forgot to take pics of this area. Im trying to connect the main feed hose to the fuel rail and the fsm shows two washers

In my engine overhaul kit from toyota there is not two washer the same size that will work one fits the bolt nice and the other it way loose. Someone that has a visual in there head, what am I missing?

hambob

they should be the same size as the one that fits. I've reused old ones with no problems.

bryy

I just don't have the old ones anymore, I put the slightly bigger in od one towards the pulsation peice it just made the most sense I hope haha

hambob

lol. Good luck. Hope it works out for you. If it doesn't, at least they're cheap.

scope103

Except that he'll be a lump of charcoal by the side of the road. That's gasoline under 44psi, hanging over a piece of exhaust system. This is not a place for shortcuts!

The crush washers are both the same size, and they're made of aluminum (copper washers are for brake lines). Since they are "crush" washers, they are one-time-use. Want to try re-using one? Think of that lump of charcoal by the side of the road.

Hambob is right, though, they're dirt cheap at the dealership.

Do the job right. You'll sleep a lot better.

bryy

Why are there two different part numbers for those gaskets per Toyota?

If the gas first runs into the top of the pulsation and then through the bolt would a gasket the size of the bolt not limit flow into the head of the pulsation?

maxisdrunk

The bolt on the front of the fuel rail, on my truck, is a tad different. It requires the larger gasket to go on first because at the end of the threads, the bolt squares off, and the smaller gasket will not slide past that part. Perhaps your gasket set is for the wrong year?

maxisdrunk

Like this

bryy

Anything is possibly but I did get my gasket set by using my vin number and it's an 85 motor. I'll try and get to a computer this morning and post up pics and diagrams

bryy

so here is the pics I have found.
Clearly showing two part numbers.

bryy

What year Truck is yours out of?

maxisdrunk

86 4runner

maxisdrunk

Maybe your damper has been replaced with an aftermarket. If that's the case, it probably had different gaskets included.

bryy

I would not doubt that with all the cheap ˟˟˟˟ this previous owner/ shop did on this truck.

Oh well 2 gaskets and a oem damper 115$ and piece of mind

Looking back on the pics I took during the disassembly there was not even a gasket on the damper side only the fuel rail side, what a joke.

maxisdrunk

If your fuel system is working fine. I would just buy another small gasket, and try them on both sides. Save 100 bucks. Just my $.02

maxisdrunk

Of course, like scope said, make sure it fits and seals correctly. No one wants to watch their toyota burn to charcoal.

osv

if copper is only for brake lines, why did my brand new denso fuel filter come with copper washers.

and if you always have to replace 'em, why did one of those new washers fail after 30 seconds of use... i finally had to re-use the old washer to get it to seal.

i do agree that replacing fuel line crush washers is a sensible idea, but i've never seen any toyota factory document that states that they must be replaced after every use.

scope103

http://personal.utulsa.edu/~nathan-b...31injector.pdf page 191. http://personal.utulsa.edu/~nathan-b.../7cylinder.pdf page 36. http://personal.utulsa.edu/~nathan-b...68cylinder.pdf page 49. For instance.

In my experience (for whatever that's worth), the crush-washers will "snug up" 2 or more turns before reaching the specified torque. In other words, they're crushing. If you re-use one of those $1 washers, you're not crushing them as designed.

I can't explain why your fuel filter came with copper washers (I have a 3VZE which doesn't have banjos on the fuel filter). But I've replaced every other engine-side crush washer (during a head gasket replacement), and all of the Toyota washers (old and new) were aluminum. (While not-reusing a one-time-use washer is easy for me to understand, I'm not as good at explaining why Toyota uses aluminum.)

But it's your truck; if saving a buck is worth the risk to you, go for it!

osv

you can't explain why toyota uses aluminum instead of copper, because there isn't a logical technical reason for it.

denso is a toyota oem supplier... the denso fuel filter came with copper washers, so your claim that copper can't be used for fuel is clearly wrong.

fyi... airplanes used copper fuel lines for decades... it's also used in far more stressful applications than what we are discussing, for instance, injector sealing gaskets on tdi engines.

thx for the link to the fsm... too bad that they don't tell you that new washers don't always seal, so you had better buy extras.

longv

I've ordered crush washers from the dealer using the part numbers listed above for the damper and they were copper.