Q: starts good when cold but after warmed up its hard to start on 1992 Jeep Wrangler

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just had head gasket replaced ,after i got it back from the auto shop, use to start good hot or cold ever with bad head gasket.
(1) Answer
(2) Comments
They hold me because I had suppied the water pump(From don the V dealership a factory replacement part $136.00 that they wouldn't warrany the the job.
they told me there was no warranty because i suppled the water PUMP, from don vee jeep ORGINAL FACTOR PEPLACMENT PART $136.00 dont know what the water pump has to do with starting issues
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