Pre 1958 Canadian Pontiac Power Train Tech Forum

New member, help identifying engine · Goach2

Hello everyone, I am the proud owner of a new-to-me 261. After some research, it appears to be a Canadian-made, for Pontiac. I haven't been able to find any posts that break down the engine serial numbers. I would like to figure out what I have, so that I can start gathering details and order the right...

TheFrenchCanadian · TheFrenchCanadian

Hi guys, I'm working on my '57 Pathfinder shifter (three on the tree)/signal light switch etc. Managed to order the necessary innards from Eckler's for a little more than $200, which is really nice. However, now that I have it apart, I see the upper mast is trashed. Nothing to even rebuild or overhaul,...

DonnyMac · DonnyMac

Hey everyone, I bought a 1948 Fleetleader, with the 239 C.I. six, and the engine had been seized and unstuck by the previous owner before I bought it. The head was still off and yesterday I started cleaning up the valves and pistons, and then under all this crud I found a crack going from the valves and do...

TheFrenchCanadian · TheFrenchCanadian

Hi all, Still plugging away at my '57, where has the summer gone? Really hoping to be driving yet this season, so close I can almost taste it. Does anyone have part number/source for the rad hoses for a '57 261 six cylinder? Managed to find one that kind of worked for the upper from a local Napa place, just h...

TheFrenchCanadian · TheFrenchCanadian

Hi guys, Now that I've got my carburetor rebuilt, I'm going to need to put a complete exhaust system on my new to me treasure once I get it running (hopefully next week). I noticed when I picked it up that everything back from the exhaust manifold is gone, so I'm starting from scratch. There is a good muffl...

TheFrenchCanadian · TheFrenchCanadian

Hi folks, Picked up my new to me 57 Poncho today, pretty excited, it's even better than I originally thought! It hasn't run in probably 30+ years, so I am going to overhaul the carburetor right off the bat. It's a 261 6 cylinder model. Do any of you know where the best place to get a carb kit? And additiona...

glenn grady · glenn grady

1957 Pathfinder with original 283 ci and three in tree. Wanting to order a clutch pack but local Lordco has multiple listings and not shure what to order before pulling it apart. Small town parts stores are not always overnight and would like to be ahead of the game. Thoughts on original clutch size. T...

Gtant T · Gtant T

I am in the process of putting a T5 trans in using my original bell housing, using the original throughout bearing, flywheel and pressure plate, with a Chev S10 clutch disk to fit the T5 trans input shaft splines. I expect if i have the transmission hole in the back of the bell housing bored out to the size...

hwscowboy · hwscowboy

anyone happen to know the part number for a 180 thermostat on a 49-54 239 flathead,think mine might be stuck after sitting so long.Seem to be a few on ebay just want to cross check to make sure they are right.

hwscowboy · hwscowboy

Hey All Well it has finally come time to try and fire up the 239 in my 49 Pontiac I've been working on.Still lots to do but most of the big stuff is finished.So I have fuel and got rid of the last fuel leak by installing a new fuel bowl/filter assembly,fuel now going to the rebuilt carb.The motor turns over an...

Gtant T · Gtant T

I have a 1950 239 that I am re-building. I also have another 1953 engine that was rebuilt and then frozen leaving the water jacket badly cracked. Can anyone see any problems with using the crank, pistons .030 over, camshaft and head from the 53 onto the 1950 block? All internal parts from the 53 block ar...

vanherk1 · vanherk1

I am installing a 292 inline six into my 55. Where can I start with motor mounts? The 292 uses an offset motor mount on the passenger side but I'm unsure what aftermarket mounts or combination of mounts to start with.

hwscowboy · hwscowboy

What is everybody using for oil in the rear diff and manual transmissions.Got to fill up both on my 49.Manual says 90 w?is that correct?

rcrac3r · rcrac3r

I have a neighbor with a 1952 Pontiac Fleetleader Deluxe. He is looking for a replacement differential as his is worn out. Any resources would be appreciated.

Alan70 · Alan70

hello all, new member here, have acquired 53 cheiftain, will need rInge, bearings etc. Gasket sets, looking for suppliers . I am located in sask. Thankyou

Alan70 · Alan70

does anyone know of any shops in Saskatoon area that still work on 50s hydra magic?

Alan70 · Alan70

finally got seized engine apart, things don't look to bad, other than a couple of the valves seem to be "pitted" on top, valve looks good otherwise, how serious is this?

cdnwillyg · cdnwillyg

Can someone tell me the original body color of the bypass filter for a 54 pathfinder? Thanks

cdnwillyg · cdnwillyg

Looking to change out my points on the Pathfinder but can't seem to find one for the 239 flathead. Does anyone know where they can be purchased? Not to concerned on brand just need to get the points out! Thanks

silver steak · silver steak

Hello, Well it is time to start up my L6 rebuilt engine for the first time. My concern is the initial priming of the oil pump through the engine internals. I have read enough just to be confused about the issue. I have read that the oil pump cannot be primed as a convention newer style engine through the di...

Topic		Started By	Replies	Views	Last Post
	New member, help identifying engine ( 1 2 ) (Preview) Hello everyone, I am the proud owner of a new-to-me 261. After some research, it appears to be a Canadian-made, for Pontiac. I haven't been able to find any posts that break down the engine serial numbers. I would like to figure out what I have, so that I can start gathering details and order the right...	Goach2	49	4981	Feb 21, 2021 by Goach2
	Upper steering column mast for 1957 - available? Column shifter mast 1957 (Preview) Hi guys, I'm working on my '57 Pathfinder shifter (three on the tree)/signal light switch etc. Managed to order the necessary innards from Eckler's for a little more than $200, which is really nice. However, now that I have it apart, I see the upper mast is trashed. Nothing to even rebuild or overhaul,...	TheFrenchCanadian	2	1477	Jan 28, 2021 by TheFrenchCanadian
	How bad is this cracked block? (Preview) Hey everyone, I bought a 1948 Fleetleader, with the 239 C.I. six, and the engine had been seized and unstuck by the previous owner before I bought it. The head was still off and yesterday I started cleaning up the valves and pistons, and then under all this crud I found a crack going from the valves and do...	DonnyMac	4	1879	Sep 24, 2020 by DonnyMac
	Rad Hoses? radiator hose 57 261 rad (Preview) Hi all, Still plugging away at my '57, where has the summer gone? Really hoping to be driving yet this season, so close I can almost taste it. Does anyone have part number/source for the rad hoses for a '57 261 six cylinder? Managed to find one that kind of worked for the upper from a local Napa place, just h...	TheFrenchCanadian	4	1862	Aug 10, 2020 by long stroke
	Exhaust system for 1957 with 261 L6? 261 exhaust 1957 Pathfinder (Preview) Hi guys, Now that I've got my carburetor rebuilt, I'm going to need to put a complete exhaust system on my new to me treasure once I get it running (hopefully next week). I noticed when I picked it up that everything back from the exhaust manifold is gone, so I'm starting from scratch. There is a good muffl...	TheFrenchCanadian	8	1709	May 5, 2020 by TheFrenchCanadian
	261 Carburetor kit? 261 carburetor kit (Preview) Hi folks, Picked up my new to me 57 Poncho today, pretty excited, it's even better than I originally thought! It hasn't run in probably 30+ years, so I am going to overhaul the carburetor right off the bat. It's a 261 6 cylinder model. Do any of you know where the best place to get a carb kit? And additiona...	TheFrenchCanadian	12	1809	May 1, 2020 by TheFrenchCanadian
	1957 Pathfinder clutch (Preview) 1957 Pathfinder with original 283 ci and three in tree. Wanting to order a clutch pack but local Lordco has multiple listings and not shure what to order before pulling it apart. Small town parts stores are not always overnight and would like to be ahead of the game. Thoughts on original clutch size. T...	glenn grady	3	2535	Feb 24, 2020 by sailortim

	1950 Pontiac transmission swap to S10/ T5 5 speed transmission (Preview) I am in the process of putting a T5 trans in using my original bell housing, using the original throughout bearing, flywheel and pressure plate, with a Chev S10 clutch disk to fit the T5 trans input shaft splines. I expect if i have the transmission hole in the back of the bell housing bored out to the size...	Gtant T	16	9351	Mar 31, 2019 by timbuk
	thermostat part number (Preview) anyone happen to know the part number for a 180 thermostat on a 49-54 239 flathead,think mine might be stuck after sitting so long.Seem to be a few on ebay just want to cross check to make sure they are right.	hwscowboy	0	2454	Jun 8, 2018 by hwscowboy
	compression/engine start issues. (Preview) Hey All Well it has finally come time to try and fire up the 239 in my 49 Pontiac I've been working on.Still lots to do but most of the big stuff is finished.So I have fuel and got rid of the last fuel leak by installing a new fuel bowl/filter assembly,fuel now going to the rebuilt carb.The motor turns over an...	hwscowboy	24	2940	Jun 2, 2018 by GLHS60
	1950 Silver Streak 239 engine rebuild (Preview) I have a 1950 239 that I am re-building. I also have another 1953 engine that was rebuilt and then frozen leaving the water jacket badly cracked. Can anyone see any problems with using the crank, pistons .030 over, camshaft and head from the 53 onto the 1950 block? All internal parts from the 53 block ar...	Gtant T	1	2717	Apr 10, 2018 by Taylor55
	1955 Pontiac Pathfinder Straight Six Swap (Preview) I am installing a 292 inline six into my 55. Where can I start with motor mounts? The 292 uses an offset motor mount on the passenger side but I'm unsure what aftermarket mounts or combination of mounts to start with.	vanherk1	6	4400	Dec 28, 2017 by 427carl
	rear diff and manual trans oil (Preview) What is everybody using for oil in the rear diff and manual transmissions.Got to fill up both on my 49.Manual says 90 w?is that correct?	hwscowboy	13	4249	Dec 25, 2017 by 4SPEED427
	1952 Fleetleader Deluxe (Preview) I have a neighbor with a 1952 Pontiac Fleetleader Deluxe. He is looking for a replacement differential as his is worn out. Any resources would be appreciated.	rcrac3r	8	4757	Oct 30, 2017 by Hosehund

	parts suppliers for engine repairs(rings,bearings etc.) 1953 cheiftain 239 (Preview) hello all, new member here, have acquired 53 cheiftain, will need rInge, bearings etc. Gasket sets, looking for suppliers . I am located in sask. Thankyou	Alan70	12	4231	Sep 22, 2017 by Fitz
	1953 hydra matic (Preview) does anyone know of any shops in Saskatoon area that still work on 50s hydra magic?	Alan70	3	2622	Sep 11, 2017 by Alan70
	239 valves (Preview) finally got seized engine apart, things don't look to bad, other than a couple of the valves seem to be "pitted" on top, valve looks good otherwise, how serious is this?	Alan70	0	2872	Sep 10, 2017 by Alan70
	Bypass filter color (Preview) Can someone tell me the original body color of the bypass filter for a 54 pathfinder? Thanks	cdnwillyg	3	2922	Aug 21, 2017 by Taylor55
	239 L6 Electronic conversion (Preview) Looking to change out my points on the Pathfinder but can't seem to find one for the 239 flathead. Does anyone know where they can be purchased? Not to concerned on brand just need to get the points out! Thanks	cdnwillyg	3	2845	Aug 7, 2017 by timbuk
	Inital Start Up 239 L6 Flat Head (Preview) Hello, Well it is time to start up my L6 rebuilt engine for the first time. My concern is the initial priming of the oil pump through the engine internals. I have read enough just to be confused about the issue. I have read that the oil pump cannot be primed as a convention newer style engine through the di...	silver steak	10	4735	Aug 1, 2017 by silver steak
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