Technical GMC SIX oil canister and generator questions

My first systems all press on fittings with no hose clamps and were br*** and a black hose. The next ones I went to the blue GoodYear hose and aluminum fittings. Both were safe for 200 psi with no clamps, in fact clamping would weaken the hose and were not recommended. This was a fight with SCTA inspectors at one time. As long as you keep them away from your exhaust you should be fine. I have hi-temp sleeves over mine but they are very close to the header system. Good luck.

 

I built a GMC 302 for street use 15 years ago. Reground hi performance cam, 9-1 forged pistons , headers etc..I did the full flow oil filter conversion and there is no oil line to the distributor gear..The gear is lubricated by the oil overflow pipe on the rocker shaft right over the distributor location...The 37 Chevy truck with this engine was sold to a guy on this forum named Larokee who drove it nearly 80,000 miles with no problems in any way related to the oiling system...
The line feeding the rocker shaft has a 1/16 inch restriction in the stock fitting...You must retain this restriction...

 

If you want to look period correct, try and find a 58-62 261 Chevrolet oil filter. This is the one I am running on the late 261 in my 53 150 and what I will be running on the full flow conversion on the early 261 I am building.

 

Thanks for all the suggestions guys.

 

Heres the final result,thanks for all the help.

One more question.
Do you guys know if i can get an oil pressure on the driverside of the block towards the rear,like in the following picture?

 

seth is there a plug on that side?

 

Re

Yes Ted,there be

 

maybe remove the plug and lightly blow air in and see where it comes out.

 

Ive had bad experiences blowing into unknown holes,Ted.im scared.

 

Hello Sir, I am searching the HAMB archives for info on the GMC full flow from byp*** conversion. I have inherited a GMC thru the p***ing of my father and this engine is before my time. This thread is 6 years old but has a lot of pertinent advice. My engine looks to be converted to full flow by the Inliners article that is referenced herein. Looks to be a Chrysler housing with rubber feed lines but no clamps. I also have a 2 qt Luberfiner filter mounted on the drivers side firewall. It's fed from a boss fitting tee lower LH side towards rear of block. Second line from tee goes to OP gauge. The return line from Luberfiner snakes around to RF corner of block and connects to block fitting in front of fuel pump.
My question is if it's converted to full flow is this Luberfiner plumbed as a secondary byp***? Does it act as only additional filter capacity or plumbed into this engine galley location serve a different purpose? System holds just shy of 10 qts maybe two filters extra insurance? I have asked a few people and your name keeps coming up. It's hell to be popular. I have enclosed a few pics. I am trying to learn a whole new generation of engine. Thank you for any input.

 

You can keep all the filters you want on the engine.
The Chrysler appearing filter could be full flow if the engine builder has a plug in the oil p***age in the block between the lines shown. My guess is that it does because no one would do what’s there without it being for full flow. My photo shows the same 2 lines going to a remote filter holder on the inside of the frame behind the shock mount with a screw on filter. There is a plug tapped in the block oil p***age. The oil pump feeds the lower hose and the filter discharge feeds the oil gallery . The lubricator keep oil in the gallery at all times. If you wanted you can get a remote screw on type adapter, remove the Chrysler one, and plumb new hoses to the new adapter. It would be smaller and easier to get filters. You could probably use the same block push on hose br*** ends. I’ve used that type for years without clamps. I buy them from McMaster Carr.

 

Those Chrysler filters are period correct for a GMC. I think from about a '47 Chrysler.

 

Thank you Mr. Jimmy.
I was pretty confident Dad did a full flow conversion when he installed the GMC engine in 53 and the car began double duty as daily driver and weekend racer. I just never asked him or understood the conversion process. I was reading the part of this thread where you mention the byp*** return line dumps next to the distributor gear for oiling and that's when I got curious as mine is forward of the fuel pump. It is good to hear that everything sounds Kosher with running two filters. Thank you for your advice.
I pulled the full flow apart this morning it houses a AC PF-319. I used a vintage interchange catalog (ba*****t is full of them) and picked up a couple Wix 51062. For now I will stay with this setup. I might do your remote mounting suggestion in the future. It would make filter changes easier and give added clearance to install a pair of new Nicson headers still sitting in the box. The current headers (no brand name, stamped steel) seem to have a much smoother exit radius than the Nicson so maybe they will remain in the box.
I am doing a lot of research, 1000s of topics on GMC's but occasionally I might have to pick the collective HAMB knowledge base if I can't find the answer.
Thanks again.

 

Your stamped steel headers are possibly Clark Headers.

 

I am thinking you are correct. Unless there is another similar header style that does not stamp or cast their name on their product. I like the way they at least try to make a smooth transition for exhaust flow.

 

This pair was sitting on a shelf. Looks the same in manufacture but a different intake setup.

 

Your car is a real time capsule. Love it!

 

Clark also made cast ones.

 

Thank you. When people talk period correct, the car is exactly how it looked in 59 when he retired it. I had to recently change out the bias plies because my trust in them was fading.

 

That's a good looking header also. It seems Nicson is the big dog on the street and they look fantastic. I wonder how good they flow when the exhaust hits a cast iron wall and turns 90 degrees as soon as it exits the port.

 

The photo of my sons 40 Chevrolet has Nicsons. The only thing about them is they are quiet and probably never leak. If you compare any tube or ones like the Clark the exhaust gas flow nicely out of the head port. Look closely at the Nicsons and they do not. The Nicsons are cast going down first and the flow is terrible. I believe they were cast to fit the stock intakes. The original exhaust manifold was the same way.

KingArthersKnight….I have the same Nicson intake on a display shelf in my garage. I don’t think is was ever installed. I’ve been offered some pretty big bucks for it. I was planning it for the engine in my sons 40 but he wanted the 3 Holleys we ran a Bonneville for 10 years and the Howard log manifold I had instead.

 

I am in agreement. I looked at the headers currently installed (member identified them as Clark possibly) and wondered why there are two new sets of Nicsons in storage. But as I posted earlier, I wonder how well they flow when exhaust has to make a 90 degree turn as soon as it exits the port. Maybe it ran better at the track and Dad preferred the Clarks and that's why they were never used. I don't imagine there was a flow test ever done comparing the top headers that I could read?
But besides performance the Nicson looks great and sits dead flush against one of the spare heads I trial fit. Looks like you could get by with a steel shim gasket the surface is nicely machined.
Your intake is new? Wow that's nice. Mine is just a different cranberry maroon color. 3 -Zeniths. I uncovered two Howard manifolds so far. 5 carb. One is new still has gaskets attached. the other I kitted the 97's cleaned it up and I think I will put it in my living room. Art is in the eye of the beholder or something like that.
I like your gl*** bowl filter post different thread. Run them on my other Chevs no problems. Let those other guys quibble about the pros and cons. Like I said I have a lot of learning to do about this type of motor. I may throw some theories at you if I can't find the answers. Thanks again.

 

Looks like art to me. Have those exhaust ports on the head been opened up?

 

No, this is just one of six heads so far I have dug out of dark storage where as a kid I did not venture into the land of spiders. Lol. This bare casting I will probably paint mount the finished intake and a pair of headers and put in my living room. Cheaper than a Van Gogh and much cooler.

 

KAK … I’m sure the manifold was the same maroon as yours. When I bought it I also received 2 other Chevrolet 6 manifold that were that color too. I sold them many years ago. We had a nice bead blaster at work so before I retired I freshened up a lot of aluminum.

Your dad kept some great parts and I congratulate you for keeping it. In my stash I have 10 GMC heads, 1 small port 248, 1 small port last 270 small chamber, 2 270H’s 4 302’s, and 2 12 ports both new, a Skinner and an Arias Howard. I also have stock steel and cast camshafts. We are currently using 2 additional 270H’s, the one you see on my sons car and one on the LSR roadster we take to Bonneville. I sold off quite a few 302 blocks over the years but still have a few plus 3 270’s. I have plenty of cranks too including a 0-0 in a crate.

The 3 Offenhauser adapters under the 2300 Holleys to the Howard log I understand are true hens teeth. I bought them in 1975.

Your 52 is awesome and a keeper for sure. It is a true “era correct” car and engine and a blessing to still see. If you’re not in Inliners International you should lookin to joining. Like minded folks; I’m #35 and been in since the beginning. Your fathers story would be a great article in their publication the 12 Port News.

Not a traditional look but is a land speed record holder GMC in our roadster.

 

This style with the heat riser on the front header was marketed as "Bumble Bee headers".

 

Thank you. That's one more item I can knock off my list of who made it and what is it.Thanks again.

 

Are they still made by Clark? Forgot to ask.

 

^^
Smith-Reiser (sp?)

 

Thank you for the kind comments.
You still have quite a collection. I am only at the tip of the iceberg, but I don't expect to rival that ***ortment of gems. Maybe I will have to do an American Pickers routine at your house.
Thanks, the 52 is a beautiful time capsule. Unchanged in almost 65 years except I had to upgrade from those damn bias plies. The original rims and tires are bagged in storage. I quit waxing it years ago. I don't think there's enough original paint left to fill a shot gl***. I appreciate the car more now than ever. Kind of a invisible unspoken presence when I drive it.
About the Inliners. I am going to look into that. Years ago a guy used to come around and he and Dad were friends. He would ask mostly about the Wayne and what type of tuning and tricks he had discovered to make it run.
His first name was Pat and he had something to do with Inliners. I think he might of had a Wayne also.
I like your salt flats machine. I am going to put it on my must do list to go to Bonneville. Save me a spot.
Thanks for the kind words. Here is a pic sitting in the staging lanes circa 1955