Timing Chain Replacement ?'s

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Corey-88K5, Jan 29, 2001.

  1. Corey-88K5

    Corey-88K5 1/2 ton status

    Feb 17, 2000
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    Home: Michigan, Stationed: Hill AFB (Home of Moab.
    Timing Chain Replacement ?\'s

    I'm getting ready to replace the 170,000 mile timing chain in my 88 K5 w/350 TBI. What my questions are is this:

    I've replaced the timing chains in Olds 350s & older Chevy 350's, but don't remember pulling the oil pan, do these newer motors require a removal of the pan? Also, there are 2 or 3 chains listed for this motor. Any body have any idea which one it is? And lastly, Its been a long time, does anybody remember or know of any problems associated with this? I just remember some of the water pump bolts are longer, and you not only need paper gaskets, but permatex also.

    Thanks in advance,

    Gettin ready to kick some West Coast BUTT!


    [​IMG]<font color=red>Girls Like Guys In Bow Ties
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  2. Emmettology 101

    Emmettology 101 3/4 ton status Premium Member

    May 9, 2000
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    Re: Timing Chain Replacement ?\'s

    Some people say you can get by with just loosening the pan and lowering the front of the pan a little. I have never tried that, but heard it works. I usually just remove the pan.

    As far as the chain goes, get a double roller chain, they are better than the stock chain and only are a few dollars more.

    For removal just take you fan off and maybe remove you radiator if you dont feel comfortable working around it. Then remove you harmonic balancer(you will need a puller for this) and then your water pump(just remember which bolts went where.
    You May also need to remove you altenator brakcet and a power steering bracket unless you have one of those newer set-up where it all(alt, pwr steering pump, etc) comes off at once.
    Then remove you timing chain cover and the three bolts hold the top timing chain gear. The bottom gear, you may need a puller for that also.(it has been a while, but I am almost sure you will need a puller)
    Then install you new chain, linning up the dots, and then reassemble everything with new gaskets and a little dab, here and there, of Gasket goop.

    I always like to put gasket goop on my gaskets to hold them onto things while I line them up. Also remember if you just drop the oil pan slightly, you will need to add more gasket goop to where the pan and timing chain cover gasket come together...(where the two gaskets meet)

    Hope this helps and if you have anymore questions, drop me a line!

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>
  3. dyeager535

    dyeager535 1 ton status Premium Member

    Dec 13, 2000
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    Roy WA
    Re: Timing Chain Replacement ?\'s

    I had to say something about the chain. If you plan on keeping your truck so long that you can put more than another 170k miles on it, there is good reason to buy a double row/double roller chain. (summit engine shops are pretty cheap, and made by Dynagear) If you don't expect to put 100,000+ miles on the thing, and aren't going to be beefing the motor up way beyond stock power levels, IMO, its a waste of money. Stock chains go for over 100,000 miles easily when the motor is taken care of, so unless something else changes, the chain won't be a weak link. And if you don't plan on owning it for another 100,000 miles, who cares anyways?

    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://yeagerd.home.mindspring.com/index2.html>http://yeagerd.home.mindspring.com/index2.html</A>

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