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| | | | Joined: Jan 2006 Posts: 98 'Bolter | | 'Bolter Joined: Jan 2006 Posts: 98 | Just bought a 72 Sub. rebuilt motor, done over 10 years ago 0 miles on rebuilt. my question is.we put in distributor,oil filter and oil. we started the motor and it blew out the oil filter gasket. Put in another new filter did the same.,Its a 350 stock motor.any help well help. I'm thinking oil pump?
Thanks
Randy (209) 329-8844
Last edited by Perro; 10/31/2008 5:09 AM.
1952 Chevy Suburban
1964 Chevy Suburban
1965 Chevy Suburban 4X4
1941 Chevy Truck
1948 Sedan Delivery
2000 K2500 Suburban
2008 K1500 Suburban
Run with the dogs or [censored] with the puppies
| | | | | Joined: Nov 2005 Posts: 6,101 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,101 | Hy Perro, is there any chance that there are two gaskets on top of the filter, in other words is there a gasket stuck up in the filter mount in the block? If the engine was rebuilt that long ago, the relief valve in the oil pump cover could be stuck in place, or the bypass valve could be stuck, or it could have been plugged by the builder. Do you have an oil pressure gauge in place, what was it reading when the engine was running? | | | | | Joined: Nov 2002 Posts: 1,002 Shop Shark | | Shop Shark Joined: Nov 2002 Posts: 1,002 | 3B is right. I had that problem on my 292 when I first started it up after rebuild. I had a mechanical oil pressure gauge installed and it was just pegged. I had also installed a new oil pump. Turned out there is a pressure relief valve in the oil pump and it was stuck. I put another oil pump in problem solved.
Larry
I don't own a vehicle that isn't old enough to drink.
| | | | | Joined: Aug 2008 Posts: 230 Shop Shark | | Shop Shark Joined: Aug 2008 Posts: 230 | if the engine has been sitting awhile before running it ,i would bet the pressure relief vale in the oil filter adaptor is stuck .it happened to me the same way it did to you before i pulled the adaptor off and freed it up then all was well .400 small block in a 71 chevelle . | | | | | Joined: Jan 2006 Posts: 98 'Bolter | | 'Bolter Joined: Jan 2006 Posts: 98 | Thanks i"ll check the oil filter adaptor first.Oil pump second.And put a oil pressure gauge.
There is no old gasket stuck.
1952 Chevy Suburban
1964 Chevy Suburban
1965 Chevy Suburban 4X4
1941 Chevy Truck
1948 Sedan Delivery
2000 K2500 Suburban
2008 K1500 Suburban
Run with the dogs or [censored] with the puppies
| | | | | Joined: Mar 2005 Posts: 121 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2005 Posts: 121 | Had the same problem years ago on a rebuilt that had sat for a while before being fired up. Pulling the pump is a big job, I would pull the distributer and "pre-oil" the engine first to see if the valve doesn't loosen up on its own first- it worked for me after only one filter.
Find an old distributer and pull the shaft out, take off the cam gear and then get a big heavy duty drill and put the shaft in it. Stick the shaft into the distributer hole and engage the oil pump then power up the drill. Do this a few times & hopefully it might free up the valve.
Dave
66 GMC- father /son project with the "GMC KID"
36 Chevy PU- 4x4 lifetime project
64 Skylark- wife says its hers
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