2 Questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

84_chevy · 04-12-2012, 05:23 PM

Can the gasket for the oil pan be replaced with the engine in the truck, it's an 84 4X4

second question; where can I find the serial number on the block, its a 350 and it really dirty, cant seem to find the numbers anywhere.

thesickc10 · 04-12-2012, 05:26 PM

in response to your second question the casting number is behind the passenger side head on the block

84_chevy · 04-12-2012, 08:05 PM

Thanks

Can I see the number from the top down or will I need a mirror or something to look for it at the back of the block

thesickc10 · 04-12-2012, 08:30 PM

youll be able to see it on top. might be lost under a lot of grease and dirt so poke around a little bit

bilfman · 04-12-2012, 08:42 PM

You can change the gasket with the vehicle in the truck. Depending on clearance you may not be able to take the pan out and will just have to work with it there having a few inches of clearance. Keep in mind that there is a rubber seal on the top and bottom of the crank. Most peeps just change the bottom rubbers in the pan and pan gasket. That said you can remove the top seals. Removing and pulling in the top seal can be done with the motor in the vehicle and not taking out the crank, this is done by pulling it out with a hook type tool and pulling in the new one with a wire fished through and attached to the new seal. You can modify the tab a bit on the side of the seal being pulled through to make the pull easier and also use lube.

84_chevy · 04-12-2012, 11:01 PM

I watched a vid on you tube of a guy changing the gasket but he had the motor out of the truck and upside down. I'm sure that's the easiest way to do the job but not very practical for me.

He used a 4 part gasket, the 2 rubber thingies that go over the crank shaft end a the 2 cork thingies that go along the oil pan sides. are you referring to the 2 rubber thingies or are there other gaskets deeper inside that I don't know about?

bilfman · 04-12-2012, 11:25 PM

I am referring to the rubber thingys

hartbraker · 04-16-2012, 04:36 PM

One piece gaskets have been referred to me. If you're gonna take the time to tear it down like that... might as well buy the best gasket you can, because they are a pain in the butt to do with the motor still in the truck. Make sure you use rtv in the front and rear of the pan where the "u-shaped" part of the pan is. Good luck

motornut · 04-17-2012, 07:32 AM

down behind the end of the valve cover

04-12-2012, 05:23 PM	#1
84_chevy Registered User Join Date: Aug 2009 Location: Toronto, Ontario Posts: 111	2 Questions Can the gasket for the oil pan be replaced with the engine in the truck, it's an 84 4X4 second question; where can I find the serial number on the block, its a 350 and it really dirty, cant seem to find the numbers anywhere.

04-12-2012, 05:26 PM	#2
thesickc10 Registered User Join Date: Sep 2010 Location: New Hope, PA Posts: 279	Re: 2 Questions in response to your second question the casting number is behind the passenger side head on the block __________________ 1985 c10 355 th350 (working on 4 speed conversion to super t10) 1979 camaro 358 super t10 2003 f250 superchip slp exhaust

04-12-2012, 08:05 PM	#3
84_chevy Registered User Join Date: Aug 2009 Location: Toronto, Ontario Posts: 111	Re: 2 Questions Thanks Can I see the number from the top down or will I need a mirror or something to look for it at the back of the block

04-12-2012, 08:30 PM	#4
thesickc10 Registered User Join Date: Sep 2010 Location: New Hope, PA Posts: 279	Re: 2 Questions youll be able to see it on top. might be lost under a lot of grease and dirt so poke around a little bit __________________ 1985 c10 355 th350 (working on 4 speed conversion to super t10) 1979 camaro 358 super t10 2003 f250 superchip slp exhaust

04-12-2012, 08:42 PM	#5
bilfman Registered User Join Date: Dec 2011 Location: Regina, SK, Canada Posts: 622	Re: 2 Questions You can change the gasket with the vehicle in the truck. Depending on clearance you may not be able to take the pan out and will just have to work with it there having a few inches of clearance. Keep in mind that there is a rubber seal on the top and bottom of the crank. Most peeps just change the bottom rubbers in the pan and pan gasket. That said you can remove the top seals. Removing and pulling in the top seal can be done with the motor in the vehicle and not taking out the crank, this is done by pulling it out with a hook type tool and pulling in the new one with a wire fished through and attached to the new seal. You can modify the tab a bit on the side of the seal being pulled through to make the pull easier and also use lube. __________________ 1979 Chevy Dually Crew 4X4 454, D60 Tru-trac, D70 Detroit Locker, 3.73, 4L80E/NP205 1971 GMC 3/4 Ton 4X4

04-12-2012, 11:01 PM	#6
84_chevy Registered User Join Date: Aug 2009 Location: Toronto, Ontario Posts: 111	Re: 2 Questions I watched a vid on you tube of a guy changing the gasket but he had the motor out of the truck and upside down. I'm sure that's the easiest way to do the job but not very practical for me. He used a 4 part gasket, the 2 rubber thingies that go over the crank shaft end a the 2 cork thingies that go along the oil pan sides. are you referring to the 2 rubber thingies or are there other gaskets deeper inside that I don't know about?

04-12-2012, 11:25 PM	#7
bilfman Registered User Join Date: Dec 2011 Location: Regina, SK, Canada Posts: 622	Re: 2 Questions I am referring to the rubber thingys __________________ 1979 Chevy Dually Crew 4X4 454, D60 Tru-trac, D70 Detroit Locker, 3.73, 4L80E/NP205 1971 GMC 3/4 Ton 4X4

04-16-2012, 04:36 PM	#8
hartbraker Registered User Join Date: Apr 2011 Location: Centerburg, Ohio Posts: 172	Re: 2 Questions One piece gaskets have been referred to me. If you're gonna take the time to tear it down like that... might as well buy the best gasket you can, because they are a pain in the butt to do with the motor still in the truck. Make sure you use rtv in the front and rear of the pan where the "u-shaped" part of the pan is. Good luck __________________ 1986 Chevy Silverado k30: factory air, tilt wheel, 454cu 7.4L, Turbo 400, NP205, Corporate 14 bolt, Dana 60 front, 4.10 gears, SRW, long bed, standard cab... MY TRUE LOVE

04-17-2012, 07:32 AM	#9
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: 2 Questions down behind the end of the valve cover Attached Images __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350



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