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<blockquote data-quote="garrettpf" data-source="post: 5785542" data-attributes="member: 575445"><p>AH HAAA. I have a 4.3l in an S-10 w/hi press. pump. I put synth in and as the engine temp goes up the press goes down. People told me I need to put a shunt on the rear of the engine where the oil runs to the cam. I thought that to be a bad idea. I never knew what caused the problem and thought maybe too much clearance on the cam or crank bearings. Maybe it is just synth that is causing it //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif I have to take the engine out of one truck and put it into another. I built the engine myself and nothing is stock and it was blue-print right to the point of checking clearance //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif (I was in too much of a hurry at that point). When I take it out I am just going to throw in the stock pump. I will may take the cam and crank out/apart to check clearance but now I wonder if it is simply the pump/synth causing the issue?</p></blockquote><p></p>

[QUOTE="garrettpf, post: 5785542, member: 575445"] AH HAAA. I have a 4.3l in an S-10 w/hi press. pump. I put synth in and as the engine temp goes up the press goes down. People told me I need to put a shunt on the rear of the engine where the oil runs to the cam. I thought that to be a bad idea. I never knew what caused the problem and thought maybe too much clearance on the cam or crank bearings. Maybe it is just synth that is causing it [IMG]//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif[/IMG] I have to take the engine out of one truck and put it into another. I built the engine myself and nothing is stock and it was blue-print right to the point of checking clearance [IMG]//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif[/IMG] (I was in too much of a hurry at that point). When I take it out I am just going to throw in the stock pump. I will may take the cam and crank out/apart to check clearance but now I wonder if it is simply the pump/synth causing the issue? [/QUOTE]

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