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S10 4.3 liter -

Which repair manual can I get that tells in detail how to replace valve guide seals in a '93 S10 4.3 liter?????

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Never mind. Chilton is the best

Posted on Feb 21, 2008


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93 sundance 3.0L replace the valve seals

it is more than just the valve seals.the 3.0l engine is notorius for the valve guides slipping down into the valve pocket. there is a fix that involves adding a keeper to prevent them from falling but it requires removing heades and taking them apart. yours may have already have had this done so valve seals may fix it.
yes you can change without removing heads you need to have piston at the very top off stroke if off by a little the piston will be forced down by the air pressure so somehow locking crankshaft from moving would be a good idea.
remove plug from a cyl and fashion or buy a fitting to screw into plug hole that will also hook up to a air hose from a air compressor. the air pressure holds the valve closed then you will meed a valve spring compressor designed for removing the springs with head still installed. can rent them at auto parts stores.remove spring and replace seal. then reassemble and move on to the next
but sometimes the valve opens or piston moves down and the valve falls into the cylinder. you can pull it back up and try again or just take the heads off.
my recomendation is just take the heads off they are fairly easy to remove and instal. then have machine shop cut the grooves in the guides and install keeper clips

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List of all components for a top end rebuild. Is there a kit out there?

  1. Piston
  2. piston rings
  3. head gasket
  4. Cylinder base gasket
  5. Fresh bore on cylinder (if it can be bored), see note
  6. Possibly valves, valve guides and valve seals, see note
  7. Miscellaneous seals and gaskets
NOTE; some cylinders are nickle plated and can not be bored unless re-plated. If cylinder is beyond repair then replace it. The valves should be re-seated. If any dishing or valve stretch is present, the bad valves must be replaced. Valve guides seldom need replaced but valve guide seals could be bad. If the bike gives a puff of white smoke when started after sitting for 5 or 10 minutes then replace the seals.

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Take the head back to the machine shop & tell them to fix it. For free.

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