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    Rvlec's Avatar
    Rvlec Posts: 68, Reputation: 2
    Junior Member
    		  
    #1

    Dec 10, 2008, 07:45 PM
    Compression test for 1989 ford f-150
    I have a 1989 Ford F-150 pickup with about 350K miles. It needs valve cover gaskets, plugs, wires, muffler and other 'odd and ends'. Can I tell, from a compression check of the enging, whether it is worth spending the money on repairs? How hard is it to replace valve cover gaskets? I am an amateur.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Dec 11, 2008, 07:33 AM

    Yes, it will give you a pretty good idea of the engine's condition--good, basic, fundamental data on the valves and rings. Replacing valve cover gaskets are easy to do. Most of the time will be spent cleaning sealing surfaces.
    ShadyLady's Avatar
    ShadyLady Posts: 98, Reputation: 10
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    #3

    Dec 13, 2008, 01:11 AM

    Compression should be fairly even on all cylinders. One that is really off indicates a bad cylinder. $$$
    If you changed the oil regularly it would help prolong the life of your engine.
    Valve cover gaskets are a few bolts and easy to get to--right on top of the engine. You have to make sure the surfaces are scraped clean before you put the new gaskets on, and use a little "perma-tex" when you put them on.
    If you can get it in your area, try something called "Power Punch" Use 1/2 a quart at oil change (replacing the same amount of oil). It's great stuf, especially for an older engine.
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