Just a little more . . . . .

How to make it go fast

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Re: Just a little more . . . . .

Postby BC847 » Wed Sep 23, 2020 7:35 pm

Got the 24v lube-oil pump, lube-oil heat-exchanger and passenger's side freeze-plugs in:

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Cleaned up the injection-pump and started fitting it. Jump the gear one tooth or two? Hmm . . .

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Hoping to receive more small parts so as to button up the oil-pan soon. ;)
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
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Re: Just a little more . . . . .

Postby BC847 » Thu Sep 24, 2020 8:59 pm

UPS Select (guaranteed 3 business days). Committed to: "By 9:00PM (EST), Thursday". Sometime after 9:00PM, they rescheduled to: "By 9:00PM Friday". :roll:

It's been like that all day.

Timed the VE IP gearing advanced 1 tooth. Wrestled with a new front crankshaft seal for a while and finally installed the gear-case cover. Painted it. Cyphered on crankcase ventilation. No pics. :?
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby BC847 » Fri Sep 25, 2020 8:50 pm

Finished the girdle installation:

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David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby BC847 » Sat Sep 26, 2020 6:14 pm

Cleaned up the oil-pan.
- Added a 2nd turbo oil drain port. OMG! What a PITA! The double layering of the sheet-metal holding oil-tar combined with the Teflon coating on the inside went to off-gassing while trying to TIG-weld the bung on. Kept dicking with the torch flame making it go stupid-bright then go back to normal. I couldn't see chit! The weld looks like a spat tobacco chaw. :?
- Dimpled the rear wall of the pan in two places to clear the new main-bearing stud stuff back there.
- Painted and installed.

No pics. You've seen an oil-pan.
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby BC847 » Mon Sep 28, 2020 8:16 pm

Moving forward . . .

Set the short-block upright in its cradle.

So, I've been running two of the fancy valve-cover crankcase breathers.

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You know what? The crankcase gasses must first travel through the tappet/push-rod box before they get to the valve-covers. :shock:

I'm gonna do away with the valve-cover breathers so I can do something else up there. I got this parts-engine so . . .



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It should just clear the fuel-filter.

We'll see, huh?
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby BC847 » Thu Oct 01, 2020 6:44 pm

Been messing around with nailing stuff to the short-block. Still got a little more. Might start working on the head this weekend.


I don't care for the apparent reliability of the O-rings on the fancy Freeze-Plugs. While they aren't really that old, during cleaning the things, I found that the surface of the O-rings were starting to crack. Screw having to fix a leak right down the road. I replaced them with the standard freeze-plugs. The ones that last 25 years or so.

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The dual crankcase-vent mess fits just fine.

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David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby BC847 » Sat Oct 03, 2020 10:25 pm

Still carrying on with it . . . .

Lapped the valves today. The machinist was pretty-good with keeping the proper width seat, centered on the valve and what he had to work with in the head (the innermost 60* angle is scant in places). If I'm reading the Cummins manual right, this would have been the last time theses valve-seats can be cut (at 0.060" max valve top to head-deck). Service/replacement seats are out of the question as there's been notable whittling in there and to try and blend it in, would leave litte on the bottom of the thing.

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Started cleaning up the A1 head-studs harvested from the original build. Still gotta check the lengths.

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. . . . . steady . . .
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby BC847 » Mon Oct 05, 2020 7:35 pm

Gonna need some valve-spring shims.

I found that the new valve-guides are sitting a little proud such that the top-hat style valve-stem seals weren't quite fully seating in the valve-spring pockets. DOH!!
- I figure I can slip a valve-spring shim under the top-hat's flange.

Including the 0.030" valve-stem seal's flange, they average needing 0.060" to bring the installed valve-spring height to the specified 1.880". Had a couple of odd-balls needing 0.040" and damned near 0.070".

Image
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby BC847 » Thu Oct 08, 2020 7:06 pm

When you poop on Halloween, does that make it a "Spooky-Dooky"? :mrgreen:

Got the valves, springs, shims and seals installed. Carrying on with it . . . .

Image
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby BC847 » Fri Oct 09, 2020 10:19 pm

Going through those rocker-arm pedestal assemblies harvested from my original engine reveals all six intake rockers had bad galling going on.

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Fortunately, those from the donor engine were usable after a thorough cleaning and refacing the valve-stem pads.

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I reckon I need to look into the piston protrusion, head-gasket, etc mess next.
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby BC847 » Sun Oct 11, 2020 1:16 pm

Checking the piston protrusion reveals 0.022" ~ 0.024". Cool.
Checking the valve recession reveals 0.055" ~ 0.060(+)". Perhaps pushing it.
With those numbers in mind, the 188/220 cam should work with a standard thickness head-gasket.

Image
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby BC847 » Wed Oct 14, 2020 10:21 am

I bought this head-gasket some years ago as a spare. I've read where perhaps the quality has changed (read: Less) since.

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Time to torque it down. I reckon I need to run to the store first though. Wheaties or spinach? Hmmmmm . . . .

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David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby dazedandconfused » Sat Oct 17, 2020 6:03 am

Looking good.
Big Andy
1983 Dodge D150 that has been repowered with a 93 Cummins/518 running gear AKA The Ugly Duck! I would much rather build them then buy them.[
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dazedandconfused
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Re: Just a little more . . . . .

Postby BC847 » Sun Oct 18, 2020 7:37 pm

dazedandconfused wrote:Looking good.

Thanks. :)

Been slowly whittling at it.
- Got the head torqued down. Using the digital torque-wrench, I pulled them up to 125ft/lbs in numerous stages, confirming each stage is at the target-torque before moving on. Once at 50ftlbs, from then on, each stud's pull to its target was held constant so as to actually see the fastener stretch as well as the gasket structure being crushed/pinched (by way of wrench movement). You can pull up to torque, just to see the torque fall as things settled. Continuing the pull would see the wrench come well around a bit after INITIALLY reaching the target. This particular wrench has an accompanying tone that starts beeping once within 5 ft/lbs of the target. The tone goes solid when at target. The long stud's pull could last up to a minute or so once initially at the target-torque. To top it off, I initially pulled things up to 50ft/lbs. After 24 hours, pulled them up to 100 ft/lbs in two secession's. 24 hours later, pulled them first up to 115, and after a couple of hours, pulled them up to 125 ft/lbs. (Normally, I would simply allow an hour or more "rest" between stages but, I'm in no hurry here). I've used this method for years and after the above, have taken the truck out and after letting things come up to proper operating temps, promptly beat the chit out of it. No subsequent re-torques required.
- Completed the valve-train install including hybrid push-rods to accommodate the 24v lifters.
- Still sorting out what I'm gonna do with the valve-covers.
- Been focusing on the little brackets, un-used port-plugs, etc.

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Gonna start on the turbo heap directly I reckon.
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Re: Just a little more . . . . .

Postby BC847 » Wed Oct 21, 2020 10:08 am

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David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Posts: 2152
Joined: Wed Jan 03, 2007 5:22 pm
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