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1998 Chevy Venture 3.4 Ticking

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  • #1

    1998 Chevy Venture 3.4 Ticking

    Vehicle - 1998 Chevy Venture - 3.4L V6 - 160k

    My friend took her van to a shop to get a tune-up and had spark plugs, wires, oil, oil filter, fuel filter, etc changed and supposedly changed from conventional oil to a full synthetic oil.
    Few weeks later, the motor starts making a ticking sound... Like a rocker or something. But a check coolant light came on then went off right away. No check engine light whatsoever.
    The ticking is getting worse and worse so the van is now parked.
    There isn't any smell or signs of coolant in the oil. Every fluid is topped off.. Motor is not mis-firing either.

    Any ideas of what could be going on with this motor? To me it sounds like the motor is being starved of oil. I've ran a couple 3.4's low in oil. (Not purposely)
    and thats the sound I keep thinking of when I hear the ticking.

    Any help/tips would be appreciated.
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  • #2
    If your familiar with older v-8's.....

    a rod knock in the 3.4's sound just like a lifter tick in an old iron v-8.
    Till you get used to the 3.4 that is. can you see down into the valve cover area? Through the oil cap? with the motor running see if oil is pooling, it should, if its being lubed right. Also check your oil pressure with a gauge, not the van's gages, temporarily hook one up and get a real reading at idle with engine warm.

    got a test light? the tool that looks like an ice pick with a wire off the end of it.
    get one, ground the wire, then with engine running, poke through the end of the spark plug wire boot at the coils/distributor cap, one at a time and listen to your tapping. This will short out and shut-down each cylinder spark. If you have piston slap or a spun rod bearing the tapping will cease when you kill the cylinder its on. If it keeps tapping GOOD! means you got a lifter tap for sure.

    There is a very good chance that the new oil cleaned out goop, and the goop got jammed in a lifter. If you have good oil pressure, change the oil again, stay synthetic, substitute 1 quart of oil for a quart of marvel mystery oil. drive the van for 2 months or 1500 miles, which ever comes first, and change the oil again with same mixture till noise goes away.

    Or

    Yank intake and change lifters.
    sigpicHow to make High performance Emissions:
    A "true" High flow converter, straight pipe.
    Low/No flow EGR valve, block off plate.
    Carbon canister and purge valve mod, place in large 30 Gallon can, cover, and place curbside, the city will do the rest.
    PCV valve and vent tube, reroute to exhaust to dump where it belongs, on the ground. Or add breathers and let it all free.

    Comment

    • #3
      Any chance you can shoot a thirty second to one minute of video while doing a walk around on the engine compartment and then post it on your FREE Photobucket Account with a link dropped in a future message?

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      Comment

      • #4
        no. I refuse to shoot another video on auto instruction. Last time I did that it was a 3 hour instructional video designed to teach housewives how to check fluids and basic operation so they wouldn't get ripped off at an auto-shop. When viewed all they said was, "nice butt!" Now granted, I have an excellant posterior and present the ultimate image of manhood, but they missed the point of the video.



        Video will have to wait until after x-mas, no camcorder till then.
        sigpicHow to make High performance Emissions:
        A "true" High flow converter, straight pipe.
        Low/No flow EGR valve, block off plate.
        Carbon canister and purge valve mod, place in large 30 Gallon can, cover, and place curbside, the city will do the rest.
        PCV valve and vent tube, reroute to exhaust to dump where it belongs, on the ground. Or add breathers and let it all free.

        Comment

        • #5
          Err...Uhhh.. That suggestion was for the OP...

          Comment

          • #6
            also, considering it's a '98 an OBD2, if it has a rod knock she'd be throwing a knock code. IIRC.
            sigpicHow to make High performance Emissions:
            A "true" High flow converter, straight pipe.
            Low/No flow EGR valve, block off plate.
            Carbon canister and purge valve mod, place in large 30 Gallon can, cover, and place curbside, the city will do the rest.
            PCV valve and vent tube, reroute to exhaust to dump where it belongs, on the ground. Or add breathers and let it all free.

            Comment

            • #7
              1 bottle of GM EOS, run to operating temp, shut off, let cool, and then repeat.
              Do this a few times should help clean out the crap in the lifter that is causing it to bleed down.
              As of April 2
              3rd Gen Cavy has 3500 Installed!
              ----------------------------
              Engine: 2006 SV6 3500 LX9
              Trans: 2002 Getrag F23 5speed
              Pcm: 2001 Impala La1 3400 with complete Engine Harness.
              Injectors: #36 GTPs
              TB: 65mm TCE
              Maf: 1999 3400 Montana.
              Adjustable TCE Fuel pressure Regulator
              Walbro W1 255 pump from Racetronix.
              Beverages: Ice Cold CANADIAN.

              Comment

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