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#1
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Oil pan question
I have 3 oil pans to choose from for the 461 I am building for my 70 GTO. See the attached pictures. Middle one was on the matching numbers engine. Dirty one was on a 69 YD 400 out of a Catalina that was running in the GTO. Gold is Summit stock replacement. Note the Summit has the baffle and the stock pans do not. The Summit also has the side mounted drain plug like the original. I plan on using the Summit pan unless someone knows of any clearance issues mounting in the A body chassis. Depth appears same as the stock pans. Thoughts? Concerns?
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1970 GTO 400 Atoll Blue, PS, PDB, A/C Was M20 4 speed, now has Keisler RS600 5 speed. Last edited by pontiacmark; 12-29-2022 at 11:38 PM. Reason: added attachments |
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#2
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Summit.Tom
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#3
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Thanks Tom!
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1970 GTO 400 Atoll Blue, PS, PDB, A/C Was M20 4 speed, now has Keisler RS600 5 speed. |
#4
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#5
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The 1972-1/2 and later style baffled pans (the Summit pan) won’t lose oil pressure nearly as easily as the non-baffled pans under hard braking, that was a long overdue upgrade for sure.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#6
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Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#7
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I would use some oil resistant RTV between the pan and the cork gasket that goes over the rear main cap. Original pan had an indent to hold the cork in place where the summit pan doesn't have that feature.
baffled pan is nice. go summit
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1979 Firebird Trans Am 301/4spd (Now 428) 1977 Firebird Formula 400/Auto 2007 Grand Prix GXP 5.3L |
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#8
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Last edited by Ram Air IV Jack; 12-30-2022 at 06:47 PM. |
#9
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Definitely the baffled pan
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#10
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The drain plug threads are weak on most aftermarket stock type replacement pans. If a factory oil pan that is in good shape is available and you can clean it properly, you are always better off with that. Also the factory pan may mate properly with the rear main cap pan seal recess. The replacement pans are designed for the worse design pan seal used from approximately 71-77ish.
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#11
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Clean up the stock pan, make a baffle and tack weld it in there. Not hard at all to do.
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#12
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In regards to the reproduction oil pan, how many posts here on PY have addressed at least one line of repro oil pan, & the way they are formed in the front? I cant read every post, ESP in the Street Forum, but do know there have been many w clearance issues to the centerlink in certain chassis.
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Buzzards gotta eat... same as worms. |
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#13
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1966 Pontiac GTO (restoration thread) 1998 BMW 328is (track rat) 2023 Subaru Crosstrek Limited (daily) View my photos: Caught in the Wild Last edited by ZeGermanHam; 01-01-2023 at 02:15 PM. |
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#14
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Double crank scrappers so did not seem like there was enough room for a gasket. First time for me so we will see how it all seals. BOP one piece also. |
#15
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Like Ol Pinion Head said, if the front half of the Summit pan is deeper than the original pan, you might have clearance issues with the center steering link
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1966 Lemans, 3700Lbs, 406 ci, #96 Heads, Crane 467/494 cam, RPM Intake, Q-Jet, 11 inch Converter, 3:90 gears, 3 inch exhaust, Best ET 12.62@107 MPH 414ci shortblock coming soon! |
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#16
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It’s not like finding a good factory baffled pan is all that difficult, place a parts wanted ad and one will surely pop up.
Sell your non-baffled pans, I’ve sold several to guys looking for those pans to use on restorations. Straight non-rusty early oil pans sell for good money.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#17
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From experience..
Summit appears to be Miloden The " gold dichromate " resists paint, yes even engine paint. If you use one and want it to stay " blue" I would suggest bead blasting the bottom before you clean and paint/ use it.
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
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#18
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1967 Firebird 462 580hp/590ftlbs 1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455 Owner/Creator Catfish Motorsports https://www.youtube.com/@CatfishMotorsports |
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