I have a 86 gmc sierra 1500 4.3 3 speed manuel on the cloumn.I just rebuilt the engine and when I started it up I noticed the oil pressure dropped.wHAT COULD BE THE CAUSE OF THIS? any help would be appreciated ty
Oil pressure dropping
Sep 07, 2006
1 Replies
What do you mean "When I started it up the oil pressure dropped?"
Did it drop as the engine warmed up? That's normal.
Did it drop when you slowed the engine down from a fast idle to a normal idle after it warmed up? That's normal.
Did it suddenly drop a whole lot while the engine continued at the same speed? That's not normal.
Are you using a mechanical pressure gauge, or the electric idiot gauge in the dash?
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