Need 350 rear main seal and 1 piece oil pan part # - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skokie · 10-30-2006, 07:33 PM

Title says it all. Looking for the part numbers for the 2 piece 350 rear main seal and 1 piece oil pan gasket.

Thanks

glock35ipsc · 10-30-2006, 08:11 PM

I take it the rear main was the culprit?

skokie · 10-30-2006, 11:49 PM

Yep its looking that way. Cant see where else it would come from.

phlegm · 10-31-2006, 08:49 AM

TTT and subscribed, I need the same thing on mine.

skokie · 10-31-2006, 12:19 PM

Btw hehe how hard is it to change a main real seal anyway? I know you have to drop the pan but whats after that? New territory for me.

Thanks

phlegm · 10-31-2006, 02:12 PM

Skokie,

I just did a whole thread on this too. Have a look at this, I think it will help.

http://67-72chevytrucks.com/vboard/s...ight=main+seal

skokie · 10-31-2006, 02:30 PM

Yep it helped. Doesnt look to bad. Now I just need to find the part numbers

**Green Machine** · 10-31-2006, 02:33 PM

If you have the one piece rear seal, you do not need to drop the pan to change it, but the tranny would have to come out or slid back enough for access, unless of course if the pan is leaking too.

skokie · 10-31-2006, 02:45 PM

I was just talking to a guy at a machine shop about this and he said that he hit this kinda thing once before. He changed out the real seal, oil pan gasket etc. Still leaked. Then someone who worked for him said did you change out the pcv? That fixed it. Think I will try that first. Thats easy to swap

skokie · 10-31-2006, 02:46 PM

Quote:

Originally Posted by Green Machine

If you have the one piece rear seal, you do not need to drop the pan to change it, but the tranny would have to come out or slid back enough for access, unless of course if the pan is leaking too.

Per mortec its a 2 piece seal.

phlegm · 10-31-2006, 02:49 PM

I didnt think these trucks had a PCV, learn something new every day. I know mine is leaking, the guys that put my headers in saw it when they had it up on racks last week.

skokie · 10-31-2006, 02:52 PM

Yep. Mine has a pcv valve in the drivers side valve cover.

glock35ipsc · 10-31-2006, 04:39 PM

Might take it to a car wash and pressure wash the poop outta that thing, then look for new leak/drips over the next few days, see if you can pin-point where it is coming from.

skokie · 10-31-2006, 05:23 PM

Quote:

Originally Posted by glock35ipsc

Might take it to a car wash and pressure wash the poop outta that thing, then look for new leak/drips over the next few days, see if you can pin-point where it is coming from.

Funny that you say that I just came back in from cleaning it up

Took a few damp shop rags and a couple paper towels out there and wiped it down pretty good. Later tonight I will pull it in and drop the dust cover then shine a light at the flexplate and see If i see anything. I have talked to a few people about this and they are laying odds thats its the oil pan and not the rear seal

I got 5 $ on the seal myself. Its never that easy with me LOL

70GMCer · 10-31-2006, 05:58 PM

Felpro #OS34510T

that's the part number for the 1 piece gasket......

arkracing · 10-31-2006, 07:41 PM

2 pc rear main seal:

FelPro PN 2900 - Silicone/Neoprene (Around $10)
FelPro PN 2912 - Fluoroelastomer (Around $20)

as far as the 1 piece pan seal - what year is your motor? - You need to know what front seal you have - Thin or Thick (Depending on year) (They are all about $35-$40)
FelPro PN 1880 - '75-'79 (Thick Front Pan Seal, Driver's Side DipStick)
FelPro PN 1885 - '55-'75 (Thin Front Pan Seal, Driver's Side DipStick)
FelPro PN 1881 - '80-'85 (Pass Side Dip Stick)

Check out this link:

http://store.summitracing.com/egnsea...115+4294885618

arkracing · 10-31-2006, 08:08 PM

Quote:

Originally Posted by 70GMCer

Felpro #OS34510T

that's the part number for the 1 piece gasket......

This is another PN for the Pan Gasket - Also looks to be like the one for the "Thick Front Seal", but has provisions for both Driver & Passenger Side Dip Sticks

http://store.summitracing.com/partde...5&autoview=sku

skokie · 10-31-2006, 10:02 PM

Quote:

Originally Posted by arkracing

This is another PN for the Pan Gasket - Also looks to be like the one for the "Thick Front Seal", but has provisions for both Driver & Passenger Side Dip Sticks

http://store.summitracing.com/partde...5&autoview=sku

Here is the motor from Mortec.
10066036...350...........2 or 4...Target Master/Goodwrench crate motor, 2-piece rear
Was told its the old target master crate motor The same as this
http://store.summitracing.com/partde...5&autoview=sku

arkracing · 11-01-2006, 07:30 AM

Quote:

Originally Posted by skokie

Here is the motor from Mortec.
10066036...350...........2 or 4...Target Master/Goodwrench crate motor, 2-piece rear
Was told its the old target master crate motor The same as this
http://store.summitracing.com/partde...5&autoview=sku

most of the replacement motors/target master motors have provisions for both the driver's side dipstick and the passenger side dip stick - but you will have to plug one off if you have both and it isn't already plugged.

which side is you're dip stick on?

also you will have the "Thick Front Seal"

**KSCHEVYUP** · 11-01-2006, 09:09 AM

ARKRACING- Thanks for all that good technical information. I didn't realize my 72- 350 and 79- 400 took different oil pan gaskets. May definitely save me some grief on down the road. This is a great site to learn chevy stuff.
And SKOKIE- Be sure and check your valve cover gaskets too; as they can leak in the back and run down the back of the engine. Just my .02 worth

arkracing · 11-01-2006, 09:53 AM

Quote:

Originally Posted by KSCHEVYUP

ARKRACING- Thanks for all that good technical information. I didn't realize my 72- 350 and 79- 400 took different oil pan gaskets. May definitely save me some grief on down the road. This is a great site to learn chevy stuff.
And SKOKIE- Be sure and check your valve cover gaskets too; as they can leak in the back and run down the back of the engine. Just my .02 worth

Most FelPro OilPan kits - the original cork style will come with both "Thick & Thin" front Pan seals to cover you.
If you buy the FelPro KS2600 (complete engine kit) it will have both style front pan seals as well.

But when working with the "1-piece retrofit design" - you need to know which front seal you have

10-30-2006, 07:33 PM	#1
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	Need 350 rear main seal and 1 piece oil pan part # Title says it all. Looking for the part numbers for the 2 piece 350 rear main seal and 1 piece oil pan gasket. Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234 Last edited by skokie; 10-31-2006 at 02:47 PM.

10-30-2006, 08:11 PM	#2
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: Need 350 rear main seal and 1 piece oil pan part # I take it the rear main was the culprit? __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE

10-30-2006, 11:49 PM	#3
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	Re: Need 350 rear main seal and 1 piece oil pan part # Yep its looking that way. Cant see where else it would come from. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

10-31-2006, 08:49 AM	#4
phlegm Still Green but learning Join Date: Nov 2004 Location: Central NC Posts: 1,895	Re: Need 350 rear main seal and 1 piece oil pan part # TTT and subscribed, I need the same thing on mine. __________________ -- Cory 71 Cheyenne 10 - SWB, 350, "3 on the tree" AC cab 07 Suburban LTZ 4x4 2010 Acura TL 98 Mastercraft "FrankenStar" 225 27253 UPS/USPS IIOY....nope never was

10-31-2006, 12:19 PM	#5
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	Re: Need 350 rear main seal and 1 piece oil pan part # Btw hehe how hard is it to change a main real seal anyway? I know you have to drop the pan but whats after that? New territory for me. Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

10-31-2006, 02:12 PM	#6
phlegm Still Green but learning Join Date: Nov 2004 Location: Central NC Posts: 1,895	Re: Need 350 rear main seal and 1 piece oil pan part # Skokie, I just did a whole thread on this too. Have a look at this, I think it will help. http://67-72chevytrucks.com/vboard/s...ight=main+seal __________________ -- Cory 71 Cheyenne 10 - SWB, 350, "3 on the tree" AC cab 07 Suburban LTZ 4x4 2010 Acura TL 98 Mastercraft "FrankenStar" 225 27253 UPS/USPS IIOY....nope never was

10-31-2006, 02:30 PM	#7
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	Re: Need 350 rear main seal and 1 piece oil pan part # Yep it helped. Doesnt look to bad. Now I just need to find the part numbers __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

10-31-2006, 02:33 PM	#8
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: Need 350 rear main seal and 1 piece oil pan part # If you have the one piece rear seal, you do not need to drop the pan to change it, but the tranny would have to come out or slid back enough for access, unless of course if the pan is leaking too. __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0

10-31-2006, 02:45 PM	#9
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	Re: Need 350 rear main seal and 1 piece oil pan part # I was just talking to a guy at a machine shop about this and he said that he hit this kinda thing once before. He changed out the real seal, oil pan gasket etc. Still leaked. Then someone who worked for him said did you change out the pcv? That fixed it. Think I will try that first. Thats easy to swap __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

10-31-2006, 02:49 PM	#11
phlegm Still Green but learning Join Date: Nov 2004 Location: Central NC Posts: 1,895	Re: Need 350 rear main seal and 1 piece oil pan part # I didnt think these trucks had a PCV, learn something new every day. I know mine is leaking, the guys that put my headers in saw it when they had it up on racks last week. __________________ -- Cory 71 Cheyenne 10 - SWB, 350, "3 on the tree" AC cab 07 Suburban LTZ 4x4 2010 Acura TL 98 Mastercraft "FrankenStar" 225 27253 UPS/USPS IIOY....nope never was

10-31-2006, 02:52 PM	#12
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	Re: Need 350 rear main seal and 1 piece oil pan part # Yep. Mine has a pcv valve in the drivers side valve cover. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

10-31-2006, 04:39 PM	#13
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: Need 350 rear main seal and 1 piece oil pan part # Might take it to a car wash and pressure wash the poop outta that thing, then look for new leak/drips over the next few days, see if you can pin-point where it is coming from. __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE

10-31-2006, 05:58 PM	#15
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Re: Need 350 rear main seal and 1 piece oil pan part # Felpro #OS34510T that's the part number for the 1 piece gasket...... __________________ 1997 GMC Sierra Ext 1965 Mustang

10-31-2006, 07:41 PM	#16
arkracing Weekend Warrior Join Date: Oct 2004 Location: CT Posts: 1,787	Re: Need 350 rear main seal and 1 piece oil pan part # 2 pc rear main seal: FelPro PN 2900 - Silicone/Neoprene (Around $10) FelPro PN 2912 - Fluoroelastomer (Around $20) as far as the 1 piece pan seal - what year is your motor? - You need to know what front seal you have - Thin or Thick (Depending on year) (They are all about $35-$40) FelPro PN 1880 - '75-'79 (Thick Front Pan Seal, Driver's Side DipStick) FelPro PN 1885 - '55-'75 (Thin Front Pan Seal, Driver's Side DipStick) FelPro PN 1881 - '80-'85 (Pass Side Dip Stick) Check out this link: http://store.summitracing.com/egnsea...115+4294885618 __________________ -'07 GMC Sierra K2500HD -'66 C10 Suburban -'68/'71 K20 Service Bed Project -'69 Chevy C30 Mason Dump -'33Ford P/U 396ChevyPowered Last edited by arkracing; 10-31-2006 at 08:03 PM.

11-01-2006, 09:09 AM	#20
KSCHEVYUP Senior Member Join Date: Nov 2003 Location: NEAR MARYSVILLE,KANSAS 66508 Posts: 469	Re: Need 350 rear main seal and 1 piece oil pan part # ARKRACING- Thanks for all that good technical information. I didn't realize my 72- 350 and 79- 400 took different oil pan gaskets. May definitely save me some grief on down the road. This is a great site to learn chevy stuff. And SKOKIE- Be sure and check your valve cover gaskets too; as they can leak in the back and run down the back of the engine. Just my .02 worth __________________ 1972 C30 Cheyenne Super 1971 C10 (Parts truck)



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