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Mod | | | Forums66 Topics128,036 Posts1,055,450 Members48,422 | | Most Online14,466
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#43819 10/20/2004 4:37 AM | Joined: May 2004 Posts: 9 Junior Member | | Junior Member Joined: May 2004 Posts: 9 | Ok, I have a 78' seirra classic shortbed pickup with a 350 in it. When i bought the truck it had around 96000 miles on it and didnt take any oil (last fall), from what i realized. last spring I put a crane energizer cam in it. Now it take oil like crazy. I drive it to school everyday(unless bad weather) which is a 10 mile round trip. I have to add a quart almost every 40 miles. What causes this? My dad has a 78 malibu that does the same thing and he even replaced the piston rings.
there is no oil on the ground when i back up and no oil leaks on the engine block.
Im stumped, I would love any help you guys are willing to give me, even tho my truck doesnt fit the "pre 73'" category. LOL
Thanks-Dustin
I Love My Truck!
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#43820 10/20/2004 5:34 AM | Joined: Sep 2003 Posts: 2,384 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 2,384 | Could the additional cam lift have wiped out the old valve seals? Brian | | |
#43821 10/20/2004 2:18 PM | Joined: Jan 2001 Posts: 687 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 687 | I'm with 64fleetside. Either that or the extra lift and/or duration was too much for the old valve springs.
-ftyler | | |
#43822 10/20/2004 10:23 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | With that much oil consumption I would think the additional lift has caused the valve seals and guides to wear. You probably had some gunk buildup on the valve stems which acted as an abrasive. One thing I have learned over the years is not to do a cam upgrade without reworking the heads, and it sounds like you have now learned that leasson, too.
Due to the miles, I would recommend a complete rebuild, top and bottom. If you rebuild the heads only with the higher performance components, the bottom end will wear out faster.
Fred
52 3600
69 C-10
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#43823 10/21/2004 3:05 AM | Joined: Mar 2004 Posts: 3,068 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 3,068 | I would say that maybe the bottom side of your intake gasket didn't seal and you're sucking oil into your intake ports. If replacing your cam is all you did, then your intake is most likely your cause.
Just my 2 cents worth,
Scott | | |
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