Question about 2000 Ford F150 Flareside SuperCab

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Coolant in # 1 cylnder\clean intake port of intake manifold

2000 ford f150 4.6 v8 138,000 miles,has coolant in #1 cylnder,intake gaskets have been replaced,no excessive pressure in radiator,no coolant in oil,intake port tube super clean for that cylnder while the other 7 have carbon in them.confused whats wrong.possible cracked intake,anyone hear of this before?

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  • scott Apr 18, 2009

    thanks,my first time working on a triton engine,but have lots of experience of windsor 5.8.



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Check the lower intake gasket again the new gaskets that are being use made out of plastic with rubber port seals sometimes don't seal right I still used gasket sealer with the new plastic gasket even if it has rubber seals. MY 4.2 v6 had that problem but I went ahead and replaced the head gaskets also just to cover all the bases. And my F-150 has 210,000 miles on it. Make sure you tight the bolts I know it probably calls for something like 8 ft lbs which to me is not tight enough. Double it.

Posted on Apr 18, 2009


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Location of freeze plug on 2001 malibu

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Intake Manifold gasket replacement and/or leaking= Ford

Intake Manifold gasket~

Replacing intake manifold gasket:
Replacing the intake manifold gasket, I used the tube kind, it's a make it youself for about $6 (it's blue and the consistancy of toothpaste) follow directions carefully! You can get a tube at Autozone or any car parts store. Has been working great. Just ask the cashier for the make it yourself kind of intake manifold gasket. Sorry, I don't remember the name of it, it's been that

As for the Intake Manifold leaking coolant....It could, but shouldn't. One of the largest problems I've seen for coolant to leak out the Intake Manifold has been due to pressure in the system somewhere... Check the classic area:
Water pump- look for either water seapage and/or coolant. You'll know if it is because you will see real water either coming out of the water pump leak hole or under the thermostat. Most of the time coolant will pool where your heater hose runs in the intake manifold.

Mentioning heater hose. Check for leaks, holes, and/or cracked heater hoses. In-addition to the water pump, heater hoses...Check the transmission system, exhaust system, fuel system, radiator system, A/C system, secondary fan (located above the water pump housing), and thermostat.Also, check all electrical connections....Hummm....This is almost the entire workings of the vehicle.

NOTE: "It seems to be an infinity kinda thing... Once one thing starts to fail and is ignored, you are bound to be fixing a chain of event failures. Therefore, Do not ignore even the smallest problem or you'll be bound for life in repairs...."

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What does it mean if there is oil in my coolant reservoir

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2004 chevy impala overheating, loosing coolant, smell coolant sometimes

Intake Manifold gasket replacement fixed my very similar issue. New ones from GM are aluminum w/rubberized gasket - old ones plastic with a rubberized gasket - common failure in the 80-100k mile range. My mechanic did it for $620 included sealant,thermostat,valve cover gasket, gasket kit, coolant,pipe,pipe, manifold t and supercharger gasket.

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How to fix oil leaks in chevy ss impala 1996


1. Removal

Unscrew the bolt that holds the negative connection to the Impala's battery. Set this bolt aside for later use.

Remove the engine cover to access the intake manifold and manifold gasket. Disconnect the throttle body inlet duct from the engine.

Twist off the radiator cap to allow draining of the coolant to flow more smoothly. Place an empty container beneath the radiator's drain plug, and remove this plug. Allow all of the engine coolant to drain into the empty container. Replace the drain plug once you are finished.

Tag all of the electrical wiring and hoses before removing so that reconnection is precise to factory settings. Remove these parts, individually, from the intake manifold.

Loosen the bolts that hold the intake manifold to the Impala's engine block. Lift the intake manifold from the block once all bolts have been completely removed.

Use the flat-head screwdriver to pry the old intake manifold gasket from the engine block. Discard this part once you have removed it.

Clean the engine block thoroughly with the engine degreaser and linen cloth. If necessary, use a gasket scraper to remove excess buildup and grime.

2. Installation

  • Coat the top and bottom of the new intake manifold gasket with a chemical sealer so that it bonds to the engine block securely. Position this new manifold gasket so that it lines up perfectly with the cylinder ports of the Impala's engine block.

Place the old intake manifold on top of the newly-installed manifold gasket until it aligns with all of the holes of the cylinder flanges and manifold gasket.

Attach all of the bolts with your hand to the manifold. Once all bolts have been positioned, use a torque wrench and apply 15 foot-pounds of pressure to the bolts to secure the manifold into place.

Reconnect all of the necessary hoses and electrical wiring to the intake. Pour the engine coolant back into the radiator.

Reattach the engine cover on top of the intake manifold and engine block. Start the Impala's engine and check for any leaks around the new intake manifold gasket.

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I will offer a possible solution. There was a change in the intake manifolds because of soot buildup. On the old design, 8 bolts hold the airhorn to the intake manifold. Under the airhorn, and under its gasket is a channel which needs to be cleaned for top performance.

It takes a $10 gasket, and about 1 hour of time to pull and replace the cleaned part and to clean the intake passages below the airhorn.

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To install:

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  3. Apply gasket sealer to the front and rear sealing surfaces of the engine block.
  4. Apply a 0.197 inch (5mm) bead of RTV sealer to the front and rear of the block. Extend the sealer approximately 1 / 2 -inch (13mm) onto the heads.
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    3. Final step to 11 ft. lbs. (15 Nm).

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  11. Connect the upper radiator hose to the thermostat housing.
  12. Connect the heater hose to the lower intake manifold.
  13. Connect the fuel pressure and return lines to the lower intake manifold.
  14. Connect the wiring harnesses and brackets to the lower manifold.
  15. Install the throttle cable bracket, then attach the throttle cable and the cruise control cable (if equipped).
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  18. Install the PCV valve and hose.
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  22. Fill the cooling system.
  23. Connect the negative battery cable.
  24. Start the vehicle and check the ignition timing (not adjustable).
  25. Verify no oil, coolant, vacuum or fuel leaks.


  26. Install the intake manifold bolts and tighten them to 35 ft. lbs. (48 Nm) in the sequence shown.

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