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05-19-2016, 09:27 PM
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#1 |
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Registered User
Join Date: Apr 2016
Location: Puyallup WA
Posts: 48
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Gaskets for a C20/K10?
My 70 CustomCamper/20 really has a 350-SM465-NP205. I have a growing puddle of oil under it. It seems to be mostly dripping off the cross member/transfer case mount. Oil is engine oil (vs gear oil).
Trying to determine where the heck the oil is coming from. Do the transmission and transfer case use gear oil? I am thinking the rear main seal is leaking but not 100% sure. In trying to "fix" easy things first, like valve cover gaskets and oil pan gaskets, what should i replace them with? Thanks non-leaking Chevy Fans! |
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05-19-2016, 09:58 PM
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#2 |
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Proprietor of Dale's Corner
 
Join Date: Nov 2012
Location: Vacaville , CA
Posts: 15,985
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Re: Gaskets for a C20/K10?
Trans and transfer use gear oil. First thing to do is clean the area good and follow the oil trail after.
__________________
"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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05-19-2016, 11:43 PM
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#3 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,928
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Re: Gaskets for a C20/K10?
Many an "under engine" oil leak, turns out to be a valve cover gasket or a rear manifold valley seal, and the oil trickles down to the rear main seal area behind the pan and between the engine and transmission.
Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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05-20-2016, 02:39 AM
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#4 |
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Registered User
Join Date: Dec 2009
Location: bisbee, arizona
Posts: 1,529
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Re: Gaskets for a C20/K10?
also oil pressure guage tubes that go to the oil guage can work harden and crack or shear off. people getting clumsy around the distributor can breake them off.
I put a high pressure oil pump in my engine and it pumped alot of oil up to the valve covers where it would leak out running or sitting. |
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05-20-2016, 05:30 AM
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#5 |
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Registered User
Join Date: Jul 2010
Location: Knoxville,TN
Posts: 1,185
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Re: Gaskets for a C20/K10?
Gear oil smells way different than engine oil . Any auto part store will carry Fel-pro gaskets.
__________________
1972 Custom Deluxe 20 4x4 burb 1971 GMC SWB CST 4x4 1972 GMC k20 4x4 (X- brush truck ) 1971 Chevy CST Blazer 4x4 1971 Chevy C/10 1970 Cab Chassis C30 157" 1971 Cab Chassis Custom 30 Deluxe 157" 292/4spd ( Napco Replica ) 1988 Chevy V30 4x4 wrecker challenger 4812 |
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