perfect_circle

which way is it suposed to go? the only thing i could find was that it had an arrow, but mine has no arrow. ive been told to blow in it and use that to figure it out, but i dont know where to go from there.

mazdaverx713b

iTrader: (91)

yes, blow in it. mine did not have the arrow either. since it is a return, it is a check valve, meaning it will only allow fuel to pass through it one way. you want to blow through it and find out which way it allows air though. install it in so that fuel will only pass though it towards the tank and not back into the carb.

Jeff20B

iTrader: (13)

That's important because fuel will 'backwash'. When I do a dead headed setup, such as a Camden or whatever, I always block the return line because it will spill fuel onto your nice new painted engine. It happened to Tom's black with gold pinstripping '82. He kept smelling gas but couldn't find the leak. Then his engine showed signs of paint stripping.

Kentetsu

Perfect_circle's car was having issues at the last race. When he would shut down the car, the secondaries would fill up with gas, making the next start really tough. Would the check valve cause this type of issue, or is he barking up the wrong tree?

mazdaverx713b

iTrader: (91)

i would venture to say that he may have a float problem.

FirebirdSlayer666

iTrader: (3)

Ding ding ding. That is the problem. I had the same problem. I rebuilt my carb with new floats, set them correctly, still did it. Bought a different carb, did the same thing. I finally cleaned the check valve and it hasn't happened since

perfect_circle

how do i go about cleaning the check valve? if you dont mind me asking?

Kentetsu

I've cleaned brake booster check valves before. Just hose them up with WD-40 and blow through it. But since this is involving gas, maybe a good carb cleaner or Seafoam to eat off the varnish. I would probably try Seafoam first, if I had it handy, but otherwise just about anything should work. It's just a little plunger that slides back and forth (I assume).

FirebirdSlayer666

iTrader: (3)

Yeah I just sprayed carb cleaner in it, let it sit a minute, and blew thru it. I did that until I couldn't feel a difference in flow anymore

mazdaverx713b

iTrader: (91)

i used brake cleaner. cleaned it throughly, wiped it off and hit it with a heat gun to dry the residual brake cleaner before re-installing it.

perfect_circle

i ran some seafoam through it, then hit it with pb blaster, then brake parts cleaner, then threw it on, hope that helps

mazdaverx713b

iTrader: (91)

keep us posted

Kentetsu

LMAO. Well, you've certainly got all the bases covered. I'm sure you'll be alright now, but keep us posted. Maybe this will become the standard procedure for cleaning the check valves. We'll just need to know how long you used each product, in what order, and maybe some photos would help.

perfect_circle

lol. i didnt do anything elaborate. just poured a little bit of seafoam in let it settle then blew threw it, (disgusting in know, it gets worse.) then spray some pb blaster in it, then blew it out, and repeated then with the brake parts clearner... appears to have fixed the problem, but it was also installed backwards......

but wait, cause i originally had it in the right way and still had a problem, then nick told me it was probably backwards, so i turned it around....didnt help. but tonight it started right up, havent had a problem with it. of course its still smoking, so i know its drinking a tad bit of coolant.

Kentetsu

I've still got half a bottle of Alumiseal at the house. You're welcome to it if you still need it at the next race...

perfect_circle

just because that worked for you doesnt mean i want to throw it in my car... lol. it could be a freak accident that it worked for you. of course im pretty sure my car at some rtv yesterday, cause like a dumbass when i was putting the intake back on, i didnt let the gasket sealant set up, and just tried to start it...... and then it would idle.


like no **** i thought, its still wet, it'll just get sucked in and not seal...D'oh