72 k20 project

[ryanroo]

Originally Posted by Dieselwrencher

Looking nice Ryan!

Originally Posted by brimc

Awesome work!
I had to go back and look at those cab pics again. I really like that color! Can't wait to see this one finished!

Thanks Guys.

i know seeing it sitting out there helps me. i poked at the body guy the other day and made him know it was time to be seeing some more green. here's hoping

anyhow, i got a start on the tank liner.

i chose KBS Coatings tank liner. solid reviews from what i could tell.

begin with this one.



you mix this water based cleaner 50/50 with hot water and slosh it all around in the tank. i did two loads, with the second draining clear. given the fact that it is fresh steel that was cleaned before assembly, i wasnt surprised that it cleaned up quickly. the cleaner is GNARLY. it softened paint that was fresh but had spent 10 days curing.

after it is cleaned and thoroughly rinsed you button up all the holes, duct tape was the recommended patch for anything you couldn't plug. i happened to find a perfect roll to use.

as you can see, i rigged up a hokey set up on my engine stand.



then you pour this whole jug in the thing



post up in the bag chair and crank till arm falls off.



that is the rust converter/etch primer. it takes 30-60 minutes of jostling. i went for 30 considering there was almost nothing for it to convert. it left a slightly chalky layer of zinc phosphate, i think is what i read.



it will dry overnight. and then the story continues

[DeadheadNM]

Didn't realize fresh tanks needed lining. Couldn't you strap the tank filled with the rust converter in back of the Jeep that's in the driveway and bomb around some dirt roads in the hills for a while instead of hand cranking

[ryanroo]

Originally Posted by DeadheadNM

Didn't realize fresh tanks needed lining. Couldn't you strap the tank filled with the rust converter in back of the Jeep that's in the driveway and bomb around some dirt roads in the hills for a while instead of hand cranking

unfortunately, the coating is necessary. at least if you have the twitch like me... haha. uncoated, as the temp cycles here in desert land the moisture in the air in the tank can condense on the tank walls and start the cycle of rust. that leads to contaminated fuel at first and later, a leaky tank. this is also an issue for winter driving. it can get remarkable cold here and just over the divide in the San Luis Valley it frequently gets down to OMG cold. if the truck has been running for a while, the fuel is warmed up just from cycling through the IP in the engine bay and returning to the tank. that also causes condensation. this truck will see its share of winter driving. since i chose mild steel for the tank, i felt i needed to coat it.

there is a half flat basketball in the back of the jeep that my dog likes to play with at the lake. the guys i run the trails with always get a kick out of how it bounces like crazy back there, but in 5+ years of driving that thing around the basketball never comes out! maybe the same would be the case with a fuel tank... i just felt happy with myself finding another use for my engine stand... haha.

[ryanroo]

the last step.

the kit came with two quarts. i tweaked out a little and bought a just in case pint. turns out they knew what they were selling. when done i drained just about a quart out.



must be stirred well to redistribute the silver



this is the coated surface. there are some funny lines from how the pigment is laying in the urethane, but these pics were when it was still very wet. it levels out pretty good the longer it sits, but ill see for sure in 4 days when the cure time is reached.



i need to run a thread chaser though the threads that were exposed when it has set up and it could be good to go.

[6BT 56]

I have had many trucks over the years that didn't have that nice of a finish on them. Lol.

Did the other coats involve more I engine stand spinning action.? I hope you at least switched arms to even out the workout . That looks like at least a 6 cold one afternoon with all the spinning .

[DeadheadNM]

Makes sense. Is the inner coating necessary then with a stainless steel tank because of the welds?

[shopteacher]

Ok Ryan tell us a little bit about the M715 in the background !

[ryanroo]

thanks guys!

Originally Posted by shopteacher

Ok Ryan tell us a little bit about the M715 in the background !

sorry i missed this until now, i didnt mean to ignore your question!

its a 12-67 date of MFG. its mostly stock... haha. it has a complete GM driveline. tbi 454, NV4500, np205, 60f and 14ff. disk brake rear, detroit etc. old MT 40s for now. its my weekend cuiser toy. it is set up pretty well and drives comfortably at 65-70. i have an evil plan for it as soon as this green truck is done, but that will have to wait.

[ryanroo]

trying to get the turbo stuff done, so it can be sent to the ceramic coat dood.







cartridge rebuilds are in the works. both were serviceable, but the 35 is getting a little upgrade and it seems stupid not to do them both while everything is blasted apart for ceramic coat. i cant decide what to do about the down pipe. it is the closest to the firewall and i am thinking about doing a high quality heat wrap. its stainless so i think it will hold up, but i could also have it coated. i need to figure the exhaust brake out though if it gets coated.



i also got a start on port matching the flange and housing. i need to do a touch of smoothing in the manifold and in one of the pics can see the pyrometer thermocouple port has been drilled and tapped

I need to grab some more flappers and cartridge rolls tomorrow to finish

[ryanroo]

Originally Posted by 6BT 56

I have had many trucks over the years that didn't have that nice of a finish on them. Lol.

Did the other coats involve more I engine stand spinning action.? I hope you at least switched arms to even out the workout . That looks like at least a 6 cold one afternoon with all the spinning .

i doubt they were any worse or better. i cranked that thing 1000 miles over the weekend i think. i definitely had to keep myself occupied for a while this afternoon. and for sure on the arm swapping.

Originally Posted by DeadheadNM

Makes sense. Is the inner coating necessary then with a stainless steel tank because of the welds?

i would have just run a stainless with no post welding prep. there is an oxidation that happens to stainless, but it wont continue to oxidize over time.

[Dieselwrencher]

Nice work on the tank liner Ryan. I will have to remember to check this out if I get to that point on the 72.

[ryanroo]

Thanks!

so far i am sold. it has a nice smooth finish now that it has set up. the pigment is still a little streaky, but i couldn't care less about that. so far it seems just as advertised. i have no reason to think it will cause me issues. it appears to have coated everything well and as such, i cant think why it wouldnt last forever. supposedly it is not responsive to any solvent. diesel is pretty mild as that goes, adding to my confidence.

[ryanroo]

a little fiddling.



now i have to trim the ell for the inlet of the wastegate and fit/weld it.

[mx289]

The tank looks great Ryan.
Details.

Nice pipefitting work !
Really looks good.

[Ozzy2013]

Looking good

[ryanroo]

Thanks man!

as they say, the devil is in the details...

i surprised myself with the fit. i did a little tack up at work after i trimmed the hole. brought it home and it fit just fine. ill probably take the whole set up to work so i can tig weld the piping while it is clamped together. then the last few details and off to ceramic coat.

now is the time to decide on that possible upgrade on the hx35 exhaust housing. almost sure i am going to pull the trigger on the ex. brake too.

[ryanroo]

i made an order to summit a while back and to get the amount up over the free shipping number i tacked these -10oring to -10an adapters on. i put it together.



i also got this 2.5" oringed v-band set up i need to fit this Al flange to the compressor housing. the other half is SS so as to weld to my home made charge pipe. there is a 2.5" mandrel bend somewhere in the garage and a cone reducer to get from 2.5" to whatever size pipe i end up needing. have to decide what boots i am going to run for that.

[DirtyLarry]

Just keeps looking better and better every time I come back to check in on ya. Won't be long and we'll be going wheeling!

[Dieselwrencher]

Nice. The spacer/mount is still sweet!

[swamp rat]

DoOd.... glad your the guy figuring out all this turbo plumbing stuff and not me.

If it was me i'd go ahead with ceramicoat on that stainless part too. ☺

[ryanroo]

Originally Posted by Dieselwrencher

Nice. The spacer/mount is still sweet!

Thanks! as you well know, ive been playing with the idea of bigger turbo stuff. i'll leave well enough alone for now, but who know what kind of crazy ill come up with later. a couple new turbos and a 13mm pump and i'm in the big number area. i am excited to drive this set up and see how it does. i get the feeling it will be just what i need for the drive to work, or the haul a jeep to moab thing. BUT, i have revised that flange in my head a few times to accommodate an s300/s400 set. i could make it work, but i would have to rebuild the whole piping set up.... haha, stupid. maybe in a different truck. the yellow rig needs an oil burner and some go fast i think...

Originally Posted by swamp rat

DoOd.... glad your the guy figuring out all this turbo plumbing stuff and not me.

If it was me i'd go ahead with ceramicoat on that stainless part too. ☺

the piping isnt really that bad. it is a lot of fitting and grinding but i like it. gives me something to tinker with after work and isn't to fast paced. still feels like accomplishment, but doesn't require that i work very hard. perfect combo.

i kind of want to coat the down pipe, but it would require i buy my exhaust brake right now. not all bad, i am turning 30 pretty soon, so i guess a pac brake would make a decent adios to my 20s! my biggest concern is proximity to the firewall. it needs to keep heat off the firewall. if the coating is as good at that as a heat wrap then i wont care. i was staring at the truck the other day and decided that i like the green and the black of the engine. so i dont want to cover the firewall with heat barrier like i had planned. i will cover the inside, but i was going to do both sides

here is the pic again.



i guess it would be far enough not to bother. and i suppose i would be able to wrap it after the fact if i hate it. it should be easy as pie to remove. i kind of wish it could be cleared and hold the finish. the coloring from the welds is cool. but if that was the case, i should have taken the time to go full robotic on the welds. as it is, i just ran over the seams quickly and put it together.

[mx289]

Looking good.

I agree.That downpipe would look sweet raw.
It does look close to the cab though.

If you don't coat it now you will wish you did later right ? Details !




(Did i hear the yellow rig needs a burner ?
Surely,then it can make the trek to NJ )

[ryanroo]

im not sure i would trust it not to get all crappy looking. i'm sure it still gets hot and probably hot enough to burn any clear coat off. i think i will be happier with the color long term anyhow, so it looks finished.

Originally Posted by mx289

(Did i hear the yellow rig needs a burner ?
Surely,then it can make the trek to NJ )

certainly... i have been thinking of a good build plan for it so once i get a chance it will have a definate plan. i am basically thinking of a way to build it so i can easily sell it without a huge loss. i am sure i could recoup financially but i dont want to spend as much time going overboard on it in the time/fabrication/custom craziness sense.

i have this evil plan for the m715. i want to grossly overpower it. so that will be a whole powertrain swap. i have the very beginnings of my needs collected and once i am done with the chevy i will hopefully tear into that overhaul on steroids. it needs a better rear suspension and i am planning on doing some more tube work as well. it will be due for new tires in the not too distant future and i will incorporate any changes there into the refit as well. when i pull the current tbi454, nv4500, 205 combo out of the jeep in favor of the yet to be disclosed gm v8(not a dmax) 4l80, 205 combo i will sling them in the yellow truck. it has been a very reliable rig and has great drivable power. so, it may just keep that. if not, i'll do a rebuild on another 6bt and put it in the yellow truck.

you know, until i change my mind.

[ryanroo]

on the subject of coating, i have been getting stuff prepped to send.

decided to port match all the passages as well as i could.

the actual casting is much less regular than the spec'ed size of the holes. this caused a fair bit of blending to get the two all happy. the housing was blended back a ways.





when i welded the flange on the hacked up manifold, it produced a few blunt spots in the passage of gas. i mended them as best as could be.



hard to get a feel for it in pics, but i am pretty stoked with how it came out.



then the manifold and flange were matched. pretty easy considering they are the same exact cut pattern...



this was also done. the cut of the flange is very close to the t4i so it should be ok. i should have blasted it with the grinder back when i was doing the hotpipe.

[ryanroo]

no kidding, and i'm sure it will only add a few bucks to the score. i suppose i should order that stupid pacbrake.