One Piece Oil Pan Gasket - The 1947 - Present Chevrolet & GMC Truck Message Board Network

stope4 · 12-24-2007, 02:49 PM

I have a 402 BB. It's a 1971 engine. What Felpro one piece oil pan gasket works with this? The one at O'Reillys has a thick front seal. I had them pull the four piece and it was very clear that the front and rear seals on the one piece were way thicker than the four piece. Looking for the felpro part number.

Gray Ghost · 12-24-2007, 03:26 PM

All of them are thicker...my Sbc has one on it right now and the builder said it was a pita to do. You will have to get longer screws to mount the pan.

I would guess the Fel-Pro Website might have that number for you. If not you might have to make a call when they re-open after XMAS.

sodak69c10 · 12-24-2007, 06:59 PM

i put one pieces on both my small blocks, both felpro's, they came with new bolts. had to drop the pans a long ways to get it in, rather expensive too, but worth it in my opinion less places to leak

mnunn454 · 12-25-2007, 03:41 AM

I used the 4 piece gaskets (plus a dab of silicone in the corners) on my 454 rebuild and it leaked from day 1. Swapped it for a 1-piece and the problem vanished.

I tossed the box so I can't find the P/N, but I got it from AutoZone for just over $40 as I recall.

I'll never use 4-piece gaskets again.

stope4 · 12-25-2007, 05:06 AM

I used the one piece gasket on a small block 10 years ago and never had a leak afterwards. I know the gaskets are thicker, but need a part number for the bb. Don't want to remove the pan only to find out the gasket at the timing chain cover needed to be smaller. I have two part numbers FEL-OS-30061T and FPP1884R. O'Reilly's had the 61-T but didn't show they even sold the 1884R. I compared the 61-T to the four piece gasket. The front at the timing chain cover was about 3/16" to 1/4" thicker. The width was the same.

jaros44sr · 12-25-2007, 05:38 AM

This part number came up on the jeg's site

375-1884R Fel pro BBC Check it out... J.

grayw0lf · 12-25-2007, 03:11 PM

Here's another post to just say "well worth the $$!"

**FRENCHBLUE72** · 12-25-2007, 03:33 PM

I put a one piece on my 454 and it was a p.i.t.a. but its finally on there.

1968SWBBigBlock · 12-26-2007, 05:28 AM

Buy longer bolts and the PITA will go away, I have changed mine on my truck twice _ other issues not the gasket- and no problems after you go to the longer bolts

Gray Ghost · 01-07-2008, 05:33 AM

Mine's leaking like a seive....the guy must have not put it in right. I have to go get this fixed now on a brand new motor!

12-24-2007, 02:49 PM	#1
stope4 Registered User Join Date: Jan 2006 Location: Houston Posts: 434	One Piece Oil Pan Gasket I have a 402 BB. It's a 1971 engine. What Felpro one piece oil pan gasket works with this? The one at O'Reillys has a thick front seal. I had them pull the four piece and it was very clear that the front and rear seals on the one piece were way thicker than the four piece. Looking for the felpro part number.

12-24-2007, 03:26 PM	#2
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: One Piece Oil Pan Gasket All of them are thicker...my Sbc has one on it right now and the builder said it was a pita to do. You will have to get longer screws to mount the pan. I would guess the Fel-Pro Website might have that number for you. If not you might have to make a call when they re-open after XMAS. __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.

12-24-2007, 06:59 PM	#3
sodak69c10 Registered User Join Date: Mar 2007 Location: Rapid City, South Dakota Posts: 285	Re: One Piece Oil Pan Gasket i put one pieces on both my small blocks, both felpro's, they came with new bolts. had to drop the pans a long ways to get it in, rather expensive too, but worth it in my opinion less places to leak __________________ ,Clint LOUD PIPES SAVE LIVES 69 C-10 short stepside 406 sbc, 02 YAMAHA WR250F, 07 SUZUKI SV650S, 81 Grand Prix 355 sbc, 81 XT 500 YAMAHA

12-25-2007, 03:41 AM	#4
mnunn454 Registered User Join Date: Dec 2006 Location: Rhode Island Posts: 602	Re: One Piece Oil Pan Gasket I used the 4 piece gaskets (plus a dab of silicone in the corners) on my 454 rebuild and it leaked from day 1. Swapped it for a 1-piece and the problem vanished. I tossed the box so I can't find the P/N, but I got it from AutoZone for just over $40 as I recall. I'll never use 4-piece gaskets again. __________________ 69 C-10 SWB Fleetside 454/TH400 (For Sale) http://67-72chevytrucks.com/vboard/c...ct=1299&cat=12 70 El Camino 454 TH700 29 Model A 4-DR Sedan Deluxe

12-25-2007, 05:06 AM	#5
stope4 Registered User Join Date: Jan 2006 Location: Houston Posts: 434	Re: One Piece Oil Pan Gasket I used the one piece gasket on a small block 10 years ago and never had a leak afterwards. I know the gaskets are thicker, but need a part number for the bb. Don't want to remove the pan only to find out the gasket at the timing chain cover needed to be smaller. I have two part numbers FEL-OS-30061T and FPP1884R. O'Reilly's had the 61-T but didn't show they even sold the 1884R. I compared the 61-T to the four piece gasket. The front at the timing chain cover was about 3/16" to 1/4" thicker. The width was the same.

12-25-2007, 05:38 AM	#6
jaros44sr Registered User Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,467	Re: One Piece Oil Pan Gasket This part number came up on the jeg's site 375-1884R Fel pro BBC Check it out... J. __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim Last edited by jaros44sr; 12-25-2007 at 05:39 AM.

12-25-2007, 03:11 PM	#7
grayw0lf Registered User Join Date: Apr 2004 Location: Clanton, AL Posts: 1,253	Re: One Piece Oil Pan Gasket Here's another post to just say "well worth the $$!" __________________ 85' CUCV M1009!!! The newest addition! 6.2diesel, Th400, NP208, & only 36k miles! 70' C-10 LWB Fleetside - Looking good these days! 05' Dodge Neon 88' Winner Escape Sport 1750 - 4.3v6 94' Seadoo SP 84' Honda TRX200, bare nekkid. Just a frame & tires. Always looking for another project or any good deal!

12-25-2007, 03:33 PM	#8
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,604	Re: One Piece Oil Pan Gasket I put a one piece on my 454 and it was a p.i.t.a. but its finally on there. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

12-26-2007, 05:28 AM	#9
1968SWBBigBlock Active Member Join Date: Oct 2006 Location: Ohio Posts: 1,643	Re: One Piece Oil Pan Gasket Buy longer bolts and the PITA will go away, I have changed mine on my truck twice _ other issues not the gasket- and no problems after you go to the longer bolts __________________ 1968 SWB 454 + .040, 490HP x 540 FT pounds of Torque 10-1 Kb Forged pistons, recon rods w/ ARP wave loc bolts 781 heads Ported with 2.19/1.88 SSTvalves Lunati 60204 cam, Micro Trol lifters, Ported Edelbrock Performer Rpm manifold armor coated, Pertronix Triple Strike Ignition Holley 770 Street Avenger carb,Headers armor coated Built by Watson Ruppel Performance in Sarahsville Ohio. Hardshift Tranny Built Turbo 350,TSI 10" 3000 stall 12 Bolt Eaton Posi 4.10 Richmond Gears moser axles 18.5" x 31" Hoosier Pro Street Radials ET Classic 5 Wheels - polished Power Steering, Power Brakes,Disc Brakes,Tach & Gauge Dash, Tilt,Factory Air (gone) Custom Paint & Body Work Special thanks to my wife, my son and my money tree

01-07-2008, 05:33 AM	#10
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: One Piece Oil Pan Gasket Mine's leaking like a seive....the guy must have not put it in right. I have to go get this fixed now on a brand new motor! __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.

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