73-87chevytrucks.com

Oil additives

January 29, 2026, 08:29:34 pm by JohnnyPopper
Views: 682 | Comments: 5

I looked carefully at the categories and where to drop this PSA. This seems the most appropriate. If not, I'm sure it will be relocated by our crack team of mods.

50 years of serious wrenching, seen so many things come and go for various reasons.

Oil quality and additives have always interested me, as growing up poor, it made sense to pay attention to things that actually worked to keep the heart of your ride alive, for as long as possible.

I had a cohort in my early 20's that saw a demo of measuring oil quality in protecting your engine. As he described it, a small roller bearing was pitted against a steel wheel of a larger diameter, bathed in the oil as it turned. Measurable pressure was applied to the roller until it smoked. First to fail: Penzoil 30w. Best at the time: Castrol GTX 20-50.

So when I happened upon a similar demo, using weighted leverage to test additives I was keenly interested. The subject was a roller bearing against a hardened spinning steel surface. A stabilizing additive that I have used for YEARS was applied, and when 6 lbs of weight was applied it smoked. More of the same product was applied, at the same speed and weight leverage, no diff.

Enter the contender: a tiny swab of this product not only stopped the noise, but stopped the burning.

I bought a gallon. I have a few high mile cars that I wanted to try it on.

1. Wife's Euro twin DOHC V6. 162K miles. Cringe, even after oil change, on starting. At least 30-45s of clatter from the timing chains. NOW, 15s, if that.

2. '66 Olds Rocket 425 V8. Valve train tapping, on drivers side, intermittent. Now, Quiet...

3: My K10 TH350 is on her last legs. Keeping her clean to keep her alive. Symptom: funky double shifts- as in- reverse is felt, then positive engagement follows. GONE. ( I expect haters to go off on this one! All fun and games!

)

If you find this interesting, and acknowledged that I'm not a Troll (see history?) I'll be glad to share it with you

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Preformed fuel line

January 15, 2026, 12:40:02 pm by metalcutter1
Views: 3636 | Comments: 5

I am trying to find a preformed fuel line for my 1979 GMC C-10 with a 454 big block.
It's the rubber line under the hood going from the steel line from the tank to the fuel pump.
I know that I can use rubber line from the a reel, but I want to keep it as stock as possible.
I don't know the part number(that would be a great help)
All of the preformed fuel lines that I have found are 3/8, this is not 3/8.
Everything about this truck is 3/4 ton, but it's a half ton.
Any help would be appreciated.

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Brake Lights turn off if I have my lights on

January 08, 2026, 12:43:37 pm by juancano | Views: 3170 | Comments: 6

1986 C10 2WD

I've had a similar issue before but this is new.

Right side tail light: Brake light works when pedal is pressed; if I turn the lights on, the light on the tail light turns on (same bulb, 2 filaments). But, if the lights are on and I press on the brake, the bulb just turns off. So no light and no brake light.

- Replaced Bulb, tried 3 different bulbs
- Replaced socket (previous one was also a newish one)

What could it be? The brake pedal switch? Ideas?

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Crossmember spacers?

January 08, 2026, 03:56:26 am by c.whites1911 | Views: 2764 | Comments: 1

1978 K10 stock height 305 w/ th350 with np203 LWB Hey yall, long time reader second time poster, took down my transfer case to replace my transmission pump and cant remember how the crossmember spacers go on, do they go above, below, in between? Also, when my pump went out , i grabbed another one from a parts transmission i have, will that work? It moves again indernits own power but shuddered a bit at first, itll go up through the gears ok but seems like its kinda stiff getting up there and has a vibration the whole time, pretty sure my rear seal on engine started leaking too, i changed all the seals on the tranny when i attempted to fix, the pump gasket seal, front seal, anybhelp would he appreciated thanks

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11 hrs & 3 refuels later? Made it home and all I lost was this castle nut

December 07, 2025, 07:23:39 am by 87ChevyR10
Views: 2980 | Comments: 1

Was a long ride in a way but in other ways not long enough. It was a nervous ride the 1st hour, then I settled in once we got up into NC. Took the scenic route and chose to NOT go the typical up 85N route when it drag through middle NC. Went a different way that drug us through VA more so on that eastward slant, was pretty cool up until VA backroads across the Shenandoah Valley up into MD. A little nervous up through there, nowhere to pull off, trees on both sides, just woods and the occasional home. Fun times. Cool in the daytime, not so cool at night. lol

She's been parked since I got her home, could assess what was up completely. Small fix, but unfortunately, I'm kinda in limbo now til i can get a jack. A jack you say? It's hanging out with my CH air compressor and the ep386 fuel pump. Yep, there's a story, I'm ready to share positive stuff, not things that will make me walk back into negativity. At any rate...

I'm tapped til I can get a jack. I HAD one. So fixing all that stuff can wait now. She's got insurance on her, tagged up.

I literally shed a couple tears otw out the DMV across the parking lot as it got closer to driving.

Honestly, I just rode in the passenger side til it was time to go. I didn't drive her at ALL. Doesn't sound like a big deal, but to explain, NOBODY drives my 87. NOBODY. It makes it hard sometimes but. to say the least, NOBODY drives my truck. So, needless to say, I just sat and listened to her. Any skips, weird sounds. It'd been 2 years since I heard her run, and i know what she sounded like last. After some initial fighting as you would with any older vehicle, she got to going, sounded great actually.

Got the fuel cell in. Summit pump dead out the box, my bro(JGM Kustoms) had to make custom brackets for the rear shocks, 6454 springs in. Not thrilled on the angle as the new springs seat the front a little higher than the back, but, ill deal with that later, small stuff. The truck doesn't bounce or sway left/right anymore which is great.

Did a basic alignment but that's in the wind now that I gotta put the outer tierod end back in.

I'll update some more but for now i wanted to get my old photobucket set up again since I can't upload a jpEg, rather just a .JPG.

Time to go home....

Clear shot of JGM Kustoms' 1977

1st test drive? Nope. She wasnt readyyyyyyyyyyyy! (had NOT located the ground issue). She literally dropped dead at the end of the driveway at the white line. LMAO. I aint mad atcha.

Found that I'd accidentally severed the frame ground from the bed last time i had a fuel pump issue 2013 or so(which i lost 3-4 in a year). I'd pulled the bed off and snatched that right off i guess unknowingly

This was the scene for several days. Had to help get a race car OUT to get her in. This was her home for about a week. Long days into the nights out here. Spent more time out here with her than inside the house. As it should be.

This cell has worked as it should. No complaints. Didn't use alot of the stuff that came with kit. Learned about braided fuel line. F that stuff.

[img]https://photobucket.com/share/f382cc0a-0f6a-4a79-a167-72b9fff098a4[img]

Just a certain happiness now that I have her back. My old legs couldn't do too much more walking miles to and from places.

She wasn't going to single-handedly right the entire "ship" by being in my daily, but the got pretty dang close.
The only thing I know I've had longer than any friendship or any other thing I own.

I can walk to my window, slide the curtain over and look down and see her all cleaned up, almost ready to go. Just gotta wait a little longer to grab a jack(trip to get her kinda wiped us out) to get her up and try to fix this tie rod end. No more red clay though. Though she probably groaned a bit now back in the north. 1st 5 days back here? Snowed 3x on her. lol

Hope yall enjoyed the pics, i'll have a video up soon of some of the stuff we done to her. Still getting back up to speed after a week gone.

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