sheesh which felpro 1 piece oil pan gasket do I need? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

weider1717 · 01-13-2018, 06:33 PM

truck is an 87 4x4 350.

dip stick is passenger side and it looks like by reaching I need the "thick" gasket. I went to order my gaskets and saw they have one for a 1 piece or a 2 piece rear main seal.

what would my truck have came stock with? I need to know this before I order this gasket a long with all the others I will be needing. I take it order the 1 piece rubber oil pan gasket from felpro with a "steel core"?

thanks

95 S_Trucker · 01-13-2018, 06:36 PM

Your truck came from the factory with a 1 piece rear main seal engine.

weider1717 · 01-13-2018, 08:22 PM

anyone know the difference between the first two gaskets? one says thick front one doesn't one says rubber and steel core other just says rubber. Which do I need.

https://www.summitracing.com/search/...rder=Ascending

95 S_Trucker · 01-15-2018, 08:17 AM

The first one should fit your truck. Its a factory replacement gasket.

The other 2 are for performance engines, where the timing cover may be different.

The GM/Delco part number is 10108676

**Rickysnickers** · 01-15-2018, 11:18 AM

What you can do to be sure you have the right gasket is measure the oil pan. Since you are going to have it off, see how large the front semicircle is. That will tell you whether you need the thick or thin gasket. Also, even if you use one of those blue Felpro gaskets, use some sealant on the front between, the oil pan and the timing cover. I replaced mine a couple of times before realizing I needed to do that even though the instructions stated not to.

"place a straight edge across the pan rails, meas. down to the bottom of the lip-if the meas. is 2 3/8", use the thick seal, if the meas is 2 1/4", use the thin seal
they made a seal change"

**Desert1957** · 01-16-2018, 09:26 AM

Here is the Felpro kit I used on my 87 5.7 , Worked great NO leaks.

OS34500R

**Desert1957** · 01-16-2018, 09:37 AM

Sorry wrong pic , here is the OS34500R

Name: fel-os34500r_w_xl.jpg
Views: 150
Size: 21.9 KB

weider1717 · 01-17-2018, 11:30 PM

thanks to all this site is great. I try to help others when I can to repay the favor

Jake Wade · 01-19-2018, 08:53 PM

OS34500R is what I have always used, works great!

xs-style · 01-19-2018, 11:08 PM

After years of doing it with the cork gaskets and a dab of rtv, those screw in gasket holders are wonderful lol

01-13-2018, 06:33 PM	#1
weider1717 Registered User Join Date: Apr 2011 Location: greenville sc Posts: 558	sheesh which felpro 1 piece oil pan gasket do I need? truck is an 87 4x4 350. dip stick is passenger side and it looks like by reaching I need the "thick" gasket. I went to order my gaskets and saw they have one for a 1 piece or a 2 piece rear main seal. what would my truck have came stock with? I need to know this before I order this gasket a long with all the others I will be needing. I take it order the 1 piece rubber oil pan gasket from felpro with a "steel core"? thanks

01-13-2018, 06:36 PM	#2
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,178	Re: sheesh which felpro 1 piece oil pan gasket do I need? Your truck came from the factory with a 1 piece rear main seal engine.

01-13-2018, 08:22 PM	#3
weider1717 Registered User Join Date: Apr 2011 Location: greenville sc Posts: 558	Re: sheesh which felpro 1 piece oil pan gasket do I need? anyone know the difference between the first two gaskets? one says thick front one doesn't one says rubber and steel core other just says rubber. Which do I need. https://www.summitracing.com/search/...rder=Ascending

01-15-2018, 08:17 AM	#4
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,178	Re: sheesh which felpro 1 piece oil pan gasket do I need? The first one should fit your truck. Its a factory replacement gasket. The other 2 are for performance engines, where the timing cover may be different. The GM/Delco part number is 10108676

01-15-2018, 11:18 AM	#5
Rickysnickers Senior Member Join Date: Oct 2014 Location: Eagle, ID Posts: 2,931	Re: sheesh which felpro 1 piece oil pan gasket do I need? What you can do to be sure you have the right gasket is measure the oil pan. Since you are going to have it off, see how large the front semicircle is. That will tell you whether you need the thick or thin gasket. Also, even if you use one of those blue Felpro gaskets, use some sealant on the front between, the oil pan and the timing cover. I replaced mine a couple of times before realizing I needed to do that even though the instructions stated not to. "place a straight edge across the pan rails, meas. down to the bottom of the lip-if the meas. is 2 3/8", use the thick seal, if the meas is 2 1/4", use the thin seal they made a seal change"

01-16-2018, 09:26 AM	#6
Desert1957 Registered User Join Date: Apr 2009 Location: New Freedom Pa. Posts: 1,335	Re: sheesh which felpro 1 piece oil pan gasket do I need? Here is the Felpro kit I used on my 87 5.7 , Worked great NO leaks. OS34500R Attached Images __________________ Desert Last edited by Desert1957; 01-16-2018 at 09:36 AM.

01-16-2018, 09:37 AM	#7
Desert1957 Registered User Join Date: Apr 2009 Location: New Freedom Pa. Posts: 1,335	Re: sheesh which felpro 1 piece oil pan gasket do I need? Sorry wrong pic , here is the OS34500R __________________ Desert

01-17-2018, 11:30 PM	#8
weider1717 Registered User Join Date: Apr 2011 Location: greenville sc Posts: 558	Re: sheesh which felpro 1 piece oil pan gasket do I need? thanks to all this site is great. I try to help others when I can to repay the favor

01-19-2018, 08:53 PM	#9
Jake Wade Registered User Join Date: Aug 2005 Location: Louisiana Posts: 711	Re: sheesh which felpro 1 piece oil pan gasket do I need? OS34500R is what I have always used, works great!

01-19-2018, 11:08 PM	#10
xs-style Registered User Join Date: Mar 2008 Location: Lawndale, NC Posts: 658	Re: sheesh which felpro 1 piece oil pan gasket do I need? After years of doing it with the cork gaskets and a dab of rtv, those screw in gasket holders are wonderful lol __________________ 1978 Scottsdale - celebrating 10 years of teaching me profanity 1990 Silverado - bought in Nov. 2016 and it's already catching up - Sold 1987 k5 blazer - sold... :\ seed money for the 81 1981 k20 4x4 - 5.3 swap in progress Events attended: Spring GOG 2011 Dale JR car show Summer 2012 Gathering at Tommys pickup parts



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