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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
Bobcat 632 - Blown Head Gasket?
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<blockquote data-quote="craigb93" data-source="post: 124030" data-attributes="member: 4541"><p>It hasn't been mentioned but you should obtain a full engine gasket set that includes front and rear Crankshaft Seals and Valve Stem Seals. At this age all of these will be too hard/brittle to not leak. Especially if it has run hot.</p><p>You will need a Valve Spring Compressor. Rentable locally I am sure if your machinist won't do all of the head work for you. I recommend you make peace with him to the point that he will do a valve job for you. The valve stems and head ports will be carboned up even if the valve seal is good. These engines do not wear the Valve guides much so you will be good there. Just the clean up is needed.</p><p></p><p>You will want to check the Sprockets, Timing Chain and Chain Tensioner. Replace all 4 if wear is evident. </p><p></p><p>These items are surely 'scope creep' but so much easier/cheaper to do now than later. While it was on the stand I took out the crankshaft and cam to wash everything on mine. The more dirt you remove the less is present to circulate in the oil and cause wear. </p><p>When you get to the assembly stage use the STP to lube any bearings or points that move. Fill the oil pump when you put it back together. The stuff is thick enough to not drain away and will quickly prime the pump. This goes for any components that rub together:, bearings, cam, lifters, rocker arms, etc. -Dick</p><p></p><p></p><p></p><p>A Front Crank Seal is not always part of the kit but they are definitely available.</p></blockquote><p></p>
[QUOTE="craigb93, post: 124030, member: 4541"] It hasn't been mentioned but you should obtain a full engine gasket set that includes front and rear Crankshaft Seals and Valve Stem Seals. At this age all of these will be too hard/brittle to not leak. Especially if it has run hot. You will need a Valve Spring Compressor. Rentable locally I am sure if your machinist won't do all of the head work for you. I recommend you make peace with him to the point that he will do a valve job for you. The valve stems and head ports will be carboned up even if the valve seal is good. These engines do not wear the Valve guides much so you will be good there. Just the clean up is needed. You will want to check the Sprockets, Timing Chain and Chain Tensioner. Replace all 4 if wear is evident. These items are surely 'scope creep' but so much easier/cheaper to do now than later. While it was on the stand I took out the crankshaft and cam to wash everything on mine. The more dirt you remove the less is present to circulate in the oil and cause wear. When you get to the assembly stage use the STP to lube any bearings or points that move. Fill the oil pump when you put it back together. The stuff is thick enough to not drain away and will quickly prime the pump. This goes for any components that rub together:, bearings, cam, lifters, rocker arms, etc. -Dick A Front Crank Seal is not always part of the kit but they are definitely available. [/QUOTE]
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Bobcat 632 - Blown Head Gasket?
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