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NickR

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NickR last won the day on December 19 2016

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About NickR

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    1994 MX6 KFZE V6 mtx

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    West Quebec, Canada

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  1. NickR

    Inertia switch

    I don't think it does. (I don't remember ever hearing about any 626 having a fuel inertia switch.) Ford uses them, to shut off the fuel pump in an accident, but Mazda shuts off the fuel pump when the engine stops turning.
  2. I haven't heard that people need to swap the wiring harness when swapping another of the K-series engines. And the fact that the car had been running fine after the engine swap also suggests it does not need a wiring harness swap. But I don't really know. Have you checked compression? The timing belt may have slipped.
  3. NickR

    Evap System "Good Enough"

    This vaccum hose diagram (it's for the V6) should help you find the purge control solenoid: https://mazda626.net/topic/48-v-6-vacuum-hose-diagram/
  4. NickR

    Evap System "Good Enough"

    Welcome to the board! The "sludge" behind the fuel filler door puzzles me. I would be tempted to remove the plastic cover (2 phillips screws) that goes around the fuel filler neck, just to see what I could see. (Though your 96 may or may not be the same as my 94). Generic fuel line hoses would presumably be fine as a replacement. (But I don't really have any knowledge on this particular issue.)
  5. NickR

    Overheating 98 V6 ES

    I think it's unlikely to be the heater core, since this is not intended to be used to keep the engine cool. Thermostat is a cheap and easy thing to replace. The other two suspects are: blocked radiator (I mean internally blocked, though you could easily check whether it's externally blocked with bugs etc); corroded water pump fins (so it isn't pumping coolant). But those are more costly to replace. I have forgotten the name of those infra red thermometer gun things that you can point at parts of the cooling system to read the temperature. But it might be worthwhile buying/renting/borrowing one to try to help diagnose the problem. If it shows cooler spots in part of the radiator, for example, that helps diagnose a blocked radiator.
  6. NickR

    Alternator Replacement

    There are step by step instructions in my August 9th 2010 post above. Which of those steps do you need explained?
  7. NickR

    Replacing headlight socket on 2002 Mazda 626?

    Same happened to my 2000 626. Just buy a new socket. An auto parts store would have it, though might have to order it in.
  8. NickR

    Coil Pack Diagnostics

    Welcome to the board! What year is your car?
  9. Weird. One final thought: the bolts that hold the valve cover down have rubber grommets on them. Those aren't missing or badly damaged are they? Because they can leak too. Maybe put a drop of RTV around each one. Hoping all goes well with it this time!
  10. Just on the off-chance, check that there is no leak from the oil cooler O-ring (just above the oil filter), while you have the radiator removed. But I'm still surprised that so much oil would leak from the valve cover gaskets, and still have my suspicions about the oil pressure sensor, so it's good you are replacing that too.
  11. NickR

    Mystery Persistent Misfire

    A common problem is the spark plug wires go bad at higher mileage, giving a misfire at low rpm, even if they look good. I would replace them, with NGK blues.
  12. It's not a common problem on these engines. But 1/8" isn't so bad. I would just change the oil more frequently for a bit, which is the safest solution. The detergents in the oil will clean it off.
  13. The oil pressure sensor often leaks, but only when the engine is running, so you might not see it. Look at the front of the engine, about halfway between the oil filter and the alternator. It looks a bit like a spark plug, with one wire coming out of a spade connector.
  14. Even with a bad VCG, it shouldn't leak that much. Check the PCV valve. If it's blocked, the crankcase may be pressurised, forcing oil out past the VCGs. And are you sure it's leaking out past the VCG? There are other common places for leaks, especially the oil pressure sensor.
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