460 oil consumption

[viven44]

This is an interesting thread
https://www.460ford.com/threads/oil-consumption.250503/

If it is valve guides, won't a high mileage oil or an additive help swell those up a bit ?

Even at the current rate, I am not all that paranoid honestly. I ran my 84 Bronco that way for a while. Same animal. Had textbook compression but used oil. If I can reduce the consumption to quart/1000 miles that would be wonderful. I'd be as good as some of those mid-2000s Toyota Camrys

[ArdWrknTrk]

If you can show me an oil that swells brass and iron I'd be most interested.  🤔

If you're talking about the seals ON the valve guides, you may as well just pour a cup of brake fluid in there. (but know, it's going to destroy the pan, valve cover, front and rear main gaskets while it's working it's magic)

[viven44]

That’s why I like these discussions Jim. From what I can see the valve stem seals are Nylon or PTFE or Nitrile Rubber. I have no hopes of swelling it if it’s the first 2… nitrile rubber… maybe

[viven44]

Here is a Cold start video after sitting for 24-48 hours.

https://youtu.be/gjg2aJB0C0Q?si=676u9ce9UAHgSWnQ

[viven44]

Here is a comparative cold start video on Big Blue 2WD (start after sitting overnight)

https://youtu.be/wD84ED2brFA

[ArdWrknTrk]

I like the blue umbrella seals.  🙂

[viven44]

Jim, I don't think I have the time or willpower to do the seals.... maybe try a hail mary with a high mileage oil or a treatment first..... the bronco is also a "mall crawler"  Probably a 1-2K mile/year vehicle.... if the trans or something croaks out in the future after extended use... that might be a good reason to get in and address the seals.....

[viven44]

OK out of curiosity I found odometer reading since 1997 on source truck from TX state inspection records.
No service records ever.
Emissions passing up to 2009... only safety after that

Odometer copy/paste below. Indicates it was used very infrequently a lot of years. Short trips. Spikes in use around 2005 when it changed ownership.

1997 - 28231
1998 - 30281
1999 - 33371
2000 - 36276
2001 - 39625
2002 - 42294
2003 - 45441
2004 - 49566
2005 - 53788
2006 - 61780
2007 - 68902
2008 - 76272
2009 - 79727
2010 - 115058 (probably error)
2011 - 81034
2012 - 82621
2013 - 83931
2014 - 86549
2016 - 89913
2017 - 90956
2018 - 91427
2019 - 92010
2020 - 92424
2021 - 92685
2022 - 93139
2023 - 93724

[viven44]

I think I found something interesting on the 460 Rebuild book. I dealt with valve cover bolt leaks in this build running onto the exhaust manifold side and causing smoking. The leaks didn’t quit until I used ultra black on the threads… I didn't do it on all the bolts... apparently 4 of those bolts run into the intake ports!!!

I did not think about the bolts that run into the intake !!!

Have I found my “Smoking gun” potentially ??

[ArdWrknTrk]

I would try PST.
It's rated for the temp.

I have OMC cast valve covers and red silicone gaskets

[viven44]

Well I guess the book wasn’t all inclusive.. on my heads maybe not… removed the inner valve cover bolts and stuck a pick through. Bottomed out at 1 inch.

Also ran the bronco without any of those bolts. No effect on vaccum.

I do recall a couple of bolts running into the intake ports.. I cannot recall exactly which ones…

I took care to use thread sealer on all the ones that ran it to the valve train or ports… just thinking of all possible causes

[viven44]

sorry got too excited. Should have done my homework first before bringing up this possibility. If I had gone back into my PC hard drive and looked at the pics I took 6 months ago I would have realized my intake ports were different than the ones shown in the book.

Too bad my phone cannot store all the pictures. I can take like 200 pics before the storage is full!!

I feel like newer Phone iOS have padded up images sizes to fill up phones sooner. Planned obsolescence everywhere!!

Man.. that valvetrain and everything was so clean. I am bummed the seals are potentially leaking.

[viven44]

I bought that… but not sure I’m using it… I’m going to try a high mileage oil first… if that reduces the consumption that will be plan of record for the foreseeable future…

[viven44]

High mileage oil change done today 10W-40.... really hope it "reconditions" the seals with time..

[ArdWrknTrk]

Good luck!  

[viven44]

Thanks. I’ll need it!

I don’t need my wife to remind me why i didn’t take care of this while it was out on the stand!! I promised her just last week I was done with the bronco for a while

[viven44]

Checked intake manifold bolts again for torque (When warm). My cheap 3/8 inch harbor freight wrench doesn't line up perfectly with the marks, 30 looks like 35, and so forth. I set it at ~32 and went all around. 1 bolt in the center sort of needed a bit extra but all others held the torque.

Moved over the vacuum advance to ported vacuum.. when I rev it, the smoking is reduced... I need to keep an eye on this some more... makes no sense why it would help.

Am I not burning off all the oil now, or is it drawing less through the seals ?

[ArdWrknTrk]

Shouldn't make any difference.
The vacuum is still there at idle, it's just that the port is up in the transfers (above the closed throttle blade)

[viven44]

Yesterday I order the torque wrench below.. works 3.7-37 ft-lbs ... .should come in handy for intake jobs, valve train, transmission valve body, etc...

https://www.acdelco-tools.com/index.php?route=product/product&product_id=131

I am tired on relying on cheap torque wrenches for critical things. The harbor freight torque wrench, when I set it at 30ft lbs, I am not confident it is hitting that.... its meant to go from 20 to 100 ft lbs... when it works accurately.. This is the 2nd or 3rd $9 wrench I have tossed out after it failed me...

[ArdWrknTrk]

Back in the day we would just buy a beam type torque wrench.
You could throw it across the garage and it would still read correctly.

Today, I would probably buy a digital adapter that beeps and lights up.
They also do degrees, like you need for torque to yield fasteners.  💡