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Swapping Blazer tank for saddle bags ?

BIGCHEVYTRUCKDRIVER

BIGCHEVYTRUCKDRIVER

1/2 ton status
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Location
The hills of Oroville,CA
I have a 79 k1500 and want to put a Blazer tank in it but the blazer has one evaporative canister for one tank and my p/u has 2 for 2 tanks can I take the tank, evap system, and all put it in the truck and still pass california emissions?
 
No answer, I'll take a shot at it.

Call the referee or whatever they call the CARB folks, and ask.

Since it was never available, I doubt it's allowed. They will likely consider the entire setup (engine, emissions controls) as a "package" therefore mixing and matching between would be illegal.

No reason you couldn't just run the tank to one EVAP cannister and leave the other appearing to be hooked up I would imagine.
 
Mmm. I gotta say Dorian knows far more than I ever will about fuel delivery ;)

However, I'd note that the aux tank was an option, so the ARB will only require that there's one set of canister/plumbing for one tank.

It's not like the smog place is gonna look at your RPO sheet to see how many tanks you're supposed to have. If they do go so far as to look under the truck and count tanks, they'd find one, and under the hood they'd find the canister, and be happy.

As long as the correct pieces are there under the hood and appear to be connected properly, I'd say you'd pass the visual without a hitch.

Now, I would (1) remove the other tank's stuff completely, and (2) not leave an area where stuff was obviously removed. Clean out the dust, paint over it, put an extra battery there :D, whatever. No reason to draw attention to the fact that changes were made.

-- A
 
If the core support sticker is in place, that SHOULD show the emissions equipment as well, so unless it's removed, you'd still have a problem with visual. I thought at one point I heard the CA emissions stations could actually pull up the correct emissions label for your vehicle, but I'm not certain there is any truth to that.

I'd imagine a non-factory looking fuel fill setup MIGHT raise some eyebrows at an emissions place. Doesn't CA test the gas cap too?
 
dyeager535 said:
If the core support sticker is in place, that SHOULD show the emissions equipment as well, so unless it's removed, you'd still have a problem with visual. I thought at one point I heard the CA emissions stations could actually pull up the correct emissions label for your vehicle, but I'm not certain there is any truth to that.

I'd imagine a non-factory looking fuel fill setup MIGHT raise some eyebrows at an emissions place. Doesn't CA test the gas cap too?
Click to expand...

Ohhh yeah, forgot about the sticker. I suppose if it weren't present... :D :dunno:

And :doah: I didn't think about the filler tube. Yes, they test the cap itself, but as I think about it, there was an option for the pickups to use a center tank somewhere, the 25-ish gallon one as used in the Blazers. Wonder where its filler went?

-- A
 
And uhoh, I just saw the OP's tagline about ECV.

A fraternal organization dedication to the saving of widows and children, which as far I've been able to discern, involves drinking beer :haha:

If I could drink, I suspect I'd be into it ... guess I'll hafta stick with Possum Lodge :deal:

-- A
 
There was an option for a center mount tank??

My friend has a tank mounted under the bed of his '73, but judging from the wiring done by the PO (an old man) the tank wasn't stock.
 
LMC lists it, and I swear I've seen the RPO code. Mighta only been for 73-80 or whatever -- as I've only got the two '74's, anything past that is new fangled for me :D

-- A
 
If you run across anything "official" let me know. Never heard of it, but if it's pre-'81, it's ancient history to me. :)
 
in my factroy manuals there is an option for a rear-center mount gas tank, '73-'80 i think... it's something i want to put in my truck sometime down the road...
 
I'd like to see that! I'm curious if they just used a Blazer style fill neck mounted near the rear of the bed.

So what were the combo's you could get then...total of three tanks??
 
i don't think you could get all 3 tanks, but that would have been cool...!

i'll look through them tonight and see what i can come up with...
 
Really shouldn't have been a problem to use stock K5 stuff on the trucks, as the bedsides and bed floor were the same. Only difference I can think of would be where the fill neck came out of the body in relation to the rear wheel or back end, but that wouldn't have been an issue either.
 
I've got a Suburban fuel tank between the rails on my K25, holds something stupid like 160L of fuel but rarely needs to be filled up. To install it I used the Suburban's rearmost crossmember and a piece of angle iron up front for the straps. The fuel filler stuff is all stock Suburban stuff, cept I put my door and fuel lines on the driver's side of my truck.
 
Russell said:
I've got a Suburban fuel tank between the rails on my K25, holds something stupid like 160L of fuel but rarely needs to be filled up. To install it I used the Suburban's rearmost crossmember and a piece of angle iron up front for the straps. The fuel filler stuff is all stock Suburban stuff, cept I put my door and fuel lines on the driver's side of my truck.
Click to expand...

Ooh ooh. Can I see what you did with the filler? Did your truck have a door on that side already, or did you graft one in?

-- A
 
I grafted the door in myself. I just cut one off the side of a pickup box so it opens the right way and welded it in at about the same distance down from the bodyline as the front door. The filler neck is from the Suburban, and I just bought some straight 1 3/4" fuel rated hose that runs parallel with the bottom of the box straight into the filler neck. Just clears the frame and box floor. I did have to cut two crossmembers under my box to make room for the tank, and the various hoses / sending unit. It fills at full speed at the local gas station, but it does spit up a bit of fuel once it gets totally full. if you are listening to the sound of the fuel, you know when it is full though. Only got me once cause I had a semi running at the pump beside me and I couldn't hear a thing.

I did have to cut inside of my box too, to make room for the filler neck to sit behind the fuel door. The stock Suburban "bump" won't fit it, so I'll probably just make my own custom box enclosure out of some sheet metal eventually.
 
Yes they do check the fuel cap and pressurize the tank but I think I can manage to pass both of these the problem is making it look unmolested with the fuel doors there to the saddle tanks and all and no fuel door where the blazer tanks exits I have a body lift and across the rear of my truck I have a piece of diamond plate covering it up I was going to hole saw a hole into that and attach the cap and filler tube there.
 
Talked to the smog guy actually two different ones both said same thing. Take the saddle tanks out, take the switching valve out, take the switch out of the dash, take the whole evap system out of the blazer, doesn't matter if it looks stock as long as evap system is complete and it will pass a pressure test. :D
 
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