Oil pan is rotted and leaking...Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DetroitIron · 08-01-2010, 07:22 AM

Hi Guys...New to the site and love all the info on here. Need some newbie type help. I have an 85 3/4 ton 4x4 that I just purchased as a project. First fix was the trans....all good now. Next fix is the severe oil leak that the trans guy told me is due to a rotted oil pan. Can I replace the oil pan without having to pull/raise the engine? It looks doable, but I don't want to attempt without checking....Also, any tips for getting a good gasket placement/seal would be very appreciated. Thanks very much

cableguy0 · 08-01-2010, 09:10 AM

In an 85 you can usually sneak the pan right out. Make sure to get a 1 piece gasket instead of the stock 4 piece setup. The 1 piece gasket is way less prone to leaking.

DetroitIron · 08-01-2010, 10:53 AM

Thanks VERY Much! Now I just need to get the pan and gasket....

**N2TRUX** · 08-01-2010, 01:10 PM

If you need an extra bit of room to get it clear of the oil pick up, you can use a 2x4 block on a floor jack under the crank pulley. Just unbolt the through bolts on your motor mounts and jack it up a bit. Be sure to watch for clearance on your distributor cap as you go higher.

87GMCChris · 08-01-2010, 11:08 PM

When i did mine, i had to jack the engine up 2-3 inches for clearence and more room to work. I too went with the one peice gasket from fel-pro. I also replaced the pan with a new one. Along with a new pump and pickup for cheap insurance. Painted it orange to make it go faster...

08-01-2010, 07:22 AM	#1
DetroitIron Registered User Join Date: Jul 2010 Location: Hudsonville, MI Posts: 174	Oil pan is rotted and leaking...Help Hi Guys...New to the site and love all the info on here. Need some newbie type help. I have an 85 3/4 ton 4x4 that I just purchased as a project. First fix was the trans....all good now. Next fix is the severe oil leak that the trans guy told me is due to a rotted oil pan. Can I replace the oil pan without having to pull/raise the engine? It looks doable, but I don't want to attempt without checking....Also, any tips for getting a good gasket placement/seal would be very appreciated. Thanks very much __________________ _______________________________________________ 1985 Chevy Scottsdale K20 350 with 700R4 running 3.42 gearing aka "The Honey Badger" 1993 Silverado C3500 Ext. Cab Dually 6.5 turbo diesel

08-01-2010, 09:10 AM	#2
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: Oil pan is rotted and leaking...Help In an 85 you can usually sneak the pan right out. Make sure to get a 1 piece gasket instead of the stock 4 piece setup. The 1 piece gasket is way less prone to leaking. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

08-01-2010, 10:53 AM	#3
DetroitIron Registered User Join Date: Jul 2010 Location: Hudsonville, MI Posts: 174	Re: Oil pan is rotted and leaking...Help Thanks VERY Much! Now I just need to get the pan and gasket.... __________________ _______________________________________________ 1985 Chevy Scottsdale K20 350 with 700R4 running 3.42 gearing aka "The Honey Badger" 1993 Silverado C3500 Ext. Cab Dually 6.5 turbo diesel

08-01-2010, 01:10 PM	#4
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,021	Re: Oil pan is rotted and leaking...Help If you need an extra bit of room to get it clear of the oil pick up, you can use a 2x4 block on a floor jack under the crank pulley. Just unbolt the through bolts on your motor mounts and jack it up a bit. Be sure to watch for clearance on your distributor cap as you go higher. __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

08-01-2010, 11:08 PM	#5
87GMCChris Registered User Join Date: May 2010 Location: London, Ontairio Posts: 163	Re: Oil pan is rotted and leaking...Help When i did mine, i had to jack the engine up 2-3 inches for clearence and more room to work. I too went with the one peice gasket from fel-pro. I also replaced the pan with a new one. Along with a new pump and pickup for cheap insurance. Painted it orange to make it go faster... __________________ 1987 GMC Wrangler - 305TBI/TH400/Duals 1968 Camaro - Resto 2010 Ranger I only drive truck 6 months a year... Dam Canadian winters.



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