1987 Yamaha FZR 1000 Logo
Posted on Apr 12, 2009
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Fuel leaking from petcock bolts

I have installed the petcock on the tank with a new o ring and regular bolts. The area is clean and the threads in the tank are solid but fuel keep leaking from what looks to be the bolts, not the o ring. I see in the parts book that Yamaha calls those "Special" bolts. Is there anything special about the oem bolts or should I try some sort of sealer on the bolts. I don't know of a sealer that holds up to gas, but I imagine there is one...... Thank you in advance for your help!

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  • Posted on Jun 28, 2012
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Are you running open carbs? and also check your diaphrams

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  • Posted on Apr 12, 2009
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I know of a mechanic that uses PTFE TEFLON plumbing tape on harley petcocks. my bolts i got with my xvs 650 petcock dont look any special.
a bit of thread lock may do it fo you

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Petcock Valve

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How do I change the fuel petcock on my 2000 FLSTC? Its leaking and my bike is barely running and then only with the enricher pulled out.

The Enricher is only there for starting the bike as it makes the fuel mixture too rich. Over use causes carbon deposits to build up and this can cause more problems.
The Petcock is a 'Screw On' fitting. First disconnect or remove the battery to prevent any accidental sparks.
**NOTE** Do this outside or in a very well ventilated area.
Cover the side of the COLD engine with a plastic sheet to protect from splashes of fuel.
Next drain the fuel tank. ALWAYS make sure the gas can you fill into is bigger than you need to prevent overspill. Use an extra long piece of fuel line so you can stand the gas can on the floor as it might take a while to empty. Set the petcock to Reserve as it feeds from lower in the tank. Remove the filler cap and put it to one side until you are finished fitting the new part. (Faster flow when your emptying and better ventilation when working).
An extra option is to put some masking tape on the underside of the tank to prevent scratching the paint. It might be easier to disconnect any fuel line at the petcock before removing it.
Using a suitable wrench unscrew the nut between the tank and the top of the petcock. It should twist towards the front of the bike.
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Refitting.. Before fitting unscrew the mounting nut on the new petcock so it spins freely. This allows it to grab more threads when fitted giving a better fuel tight fit.
Clean the threads and hole on the tank with a rag. (Safely dispose of the rag when finished). Set the new tap to the OFF position. Carefully slide the filter body into the tank so you don't damage the filter mesh. Position the tap to the correct angle, (it doesn't have to be exact). With you fingers push the petcock firmly into position and wind the nut into place until it is finger tight. Then using a suitable wrench turn the nut until it is firmly tight. DO NOT over tighten the nut. This will strip the threads and leak fuel all over you and the engine.
Connect your fuel lines and fill the tank with about half a litre of fuel and open the petcock to the Reserve position. This is to test for any obvious leaks. Refill the tank to full, refit the fuel cap, and recheck all your pipes and connections. If you had any drips or spills Clean them up properly. Reconnect the battery and take you bike out for a run getting her up to working temperature. On your return recheck all your pipes and connections. Job done.
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Need to know how to change a fuel pump on a 98 dodge caravan..


Removal

Remove fuel filler cap and perform Fuel System Pressure Release procedure.
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  3. Drain fuel tank dry into holding tank or a properly labeled GASOLINE safety container.
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INSTALLATION
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It is believed that the fuel pump is in the fuel tank, and you have to take the tank off the vehicle to replace it.
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Camaro, Firebird, 1999 - 2002 Repair Guide
Fuel Pump - Removal & Installation

  1. Before servicing the vehicle, refer to the Precautions Section.
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  4. Clean the area surrounding the sender assembly to prevent contamination of the fuel system.
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    46aa2e5.jpg
    Fig. Fuel sender/pump assembly component identification
To install:
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Hope this help (remember rated and comment this), good luck.
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White film inside fuel tank coming off.

Sorry - misunderstood.
sounds like Kreem tank sealer or similar (there are lots of brands...) - treat for same.

  • Work in a well ventilated area
  • Don't have ignition sources around (if you light-up, you might REALLY light-up!)
  • Be aware that acetone can eat away at a nice paint job, wipe it off immediately
  • Sucking acetone fumes into a shop vac can cause fire from the electric
MATERIALS:


1. two gallons of acetone
2. 3 foot length of chain - the type of brass chain used for plant hangers works well.
3. large drip pan
4. two fabricated petcock hole covers
5. tank epoxy from Caswell or other suitable tank conditioner(?)
6. shop vacuum that can be set to blow
7. baggies
8. optional expandable rubber plug for fuel fill hole
9. 10 mm wrench (open-end helps) for dealing with sender unit
10. wire cutter (may be needed for sender unit)
11. plenty of shop rags
12. replacement O-rings for petcock gaskets
PROCEDURE IN DETAIL: 1. drain tank of all gas
2. remove petcocks
3. remove fuel gage float/sender unit
4. fabricate covers to cover petcock holes
5. remove gaskets from petcocks
6. use petcock gaskets with fabricated covers and install on tank
7. disconnect lead wires from sender unit (may have to cut and then reattach later)
8. use gasket from sender unit, install sender unit backwards on tank with float on the outside
9. pour chain into tank
10. pour gallon of acetone into tank
11. install leak proof cap (I suggest using an expandable rubber drain plug, but I just held the fuel cap down tight)
12. check for leaks
13. shake periodically, to remove rust and Kreem (keep in tank at least a day shake often enough to keep the Kreem damp prior to draining or it will re-solidify)
14. open one petcock hole and sender unit port and drain out the acetone saturated with Kreem and rust
15. remove chain - use a coathanger.
16. CAUTION acetone fumes are flammable and can ignite with the motor of a shop vacuum. Manually remove them.
17. reseal tank sender unit port and petcock holes
18. pour in 1/2 gallon of fresh acetone
19. shake often
20. remove one petcock cover
21. drain acetone into drip pan
22. replace petcock cover and gasket
23. filter the used acetone through a coffee filter into a mason jar (use the mason ring to hold filter)
24. pour in the filtered acetone (or use fresh)
25. add fresh if needed
26. shake periodically
27. repeat steps 20 to 25
28. remove petcock cover and drain tank contents
29. remove all other seals
30. use shop vac and hook it up for BLOWING.
31. Place hose over fuel filler hole and dry the inside of the tank very thoroughly (outside, of course)
32. Reseal petcock holes and sender unit port, but this time, use baggies between the tank and the gaskets to protect them from the resin. Note that I had to buy new O-rings anyway because my official Yamaha petcock gaskets were too deformed to seal after this process.
33. thoroughly mix the Caswell Tank epoxy (I used a drill attachment)
34. pour into the fuel filler hole and seal it.
35. rotate the tank, shake it, rotate it several minutes to cover all inside surfaces
36. continue for about 20 minutes or so (might depend on the temperature)
37. remove a petcock cover and drain excess epoxy
38. remove other petcock cover and sender unit
39. wipe off epoxy drips with acetone rag around open holes
40. let epoxy firm a little, install all screws with a drop of light machine oil, and then remove all screws to clear off threads, then let cure at least over night
41. Reassemble
That is, if you want to reseal it...
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Fuel pump on 2002 pontiac firebird 3.8 v-6?

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Relieve the fuel system pressure.
  3. Drain the fuel tank.
  4. Clean the area surrounding the sender assembly to prevent contamination of the fuel system.
  5. Remove or disconnect the following:
    • Fuel tank
    • Fuel sender-to-fuel tank retaining ring
    • Fuel sender from the fuel tank
    • Fuel pump from the sending unit 0900c152800a02fb.jpgFuel sender/pump assembly component identification
To install:
  1. Install or connect the following: NOTEThe fuel pump strainer must be in a horizontal position and must not block the float arm travel.
    • Fuel pump with new strainer onto the sending unit
    • New O-ring in the tank opening groove
    • New O-ring on the fuel sender feed tube
  2. Fold the strainer over itself and slowly position the sending assembly in the tank so the strainer is not damaged or trapped by the sump walls.
    • Retaining ring
    • Fuel tank. Torque the bolts to 33 ft. lbs. (45 Nm).
    • Fuel filler cap
    • Negative battery cable
  3. Turn the ignition switch to the ON position for 2 seconds, OFF for 10 seconds, then back to the ON position. Check for fuel leaks
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