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Old 12-19-2017, 06:23 PM   #2045
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1984 34.5' Airstream 345
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1984 Airstream 345 owner (Newbie) need advice!

This, Gentlemen, is the Money Shot!

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Old 12-20-2017, 04:55 PM   #2046
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Just trying to get the parts inspected, cataloged, and Motor squirreled away so I can get back to progress!

One setback, it I found the head is toast.
Common problem on these early heads is cracking, and guess what?
Every single chamber has a crack going from the 9mm(early style) Injector hole, across to the intake valve and through the seat.
Later heads have 7mm injectors to cure this... more material to keep the area strong.
The Cummins forum gents pointed it out.
Better to know now, that spend money at the Machine shop to find out!

Not the end of the world, as refurbishing the original head would have been a few hundred, and a new bare head is $300, and a fully loaded new head with new valves and springs is $500 ish.
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Old 12-20-2017, 11:41 PM   #2047
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1984 34.5' Airstream 345
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1984 Airstream 345 owner (Newbie) need advice!

The head issue described above is interesting.... one of those things you learn is a possibility after the fact.
Even if I’d spotted it at the time, I might have tried to knock down the price further but I felt I was already getting a good deal.
For everyone’s education, this is an issue on pre 1991.5 Cummins 12v heads with the 9mm injectors.
I don’t know if the motor was loosing coolant yet, but it’s only a matter of time before it did, and a 8% grade with the motor turned up and on full boost is not when I wanted to find out!

1 thru 6... only #3 is not cracked thru the valve seat yet.

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Old 12-23-2017, 10:06 PM   #2048
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Been busy with other stuff but trying to get the Cummins tucked away for a future time.
My K10 Pickup is just not playing with me... refuses to start, and when I does, it wont stay running... and its blocking the garage to unload the Range Rover... most frustrating!
I put 3 hours into it today... its giving me the finger!

It was getting late, so decided to play with the H1C Holset Turbo....
Stripped it down to see whats it was like... in fact it was good, turbines are in good shape, and only a little play in the shaft, that will be cured with a bearing, part of the $50 rebuild kit.

What I was NOT expecting... was a chunk of Aluminum stuck in the Turbo exhaust housing!
It looks like a bit of #1 piston... and it has, what looks to me, like some valve/seat imprints on it! LOL
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Old 12-23-2017, 10:14 PM   #2049
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I know #1 looks ugly... but I think it will be ok.
I inspected all the other bores and didnt see anything too scary...
In fact, I can still see the hone marks on the thrust side of all the other bores.
It remains to be seen if I go with a sleeve and std piston on #1, and the rest just get a hone and new rings, or all of them go oversize.
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Old 12-26-2017, 04:36 PM   #2050
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Not much to report this week... Just chillin.

FWIW, my copy of Car Craft Magazine(March 2018 edition) arrived today and it had a VERY interesting article in it...

Seems they acquired an Ugly 1986 Suncraft Motorhome, with a 454 in it with 35,000 miles showing....

This would be exactly the same motor that most of us have...
They had plans for this motor, so pulled it out, and put it on the straight on the Dyno to get a baseline before the did the mods and put it in a C10 Pickup...

Without touching it, and still on the original crusty Quadrajet, heads, cam, etc, but using a set of Dyno headers, it put out....

335hp @ 4300rpm and 485ftlb @2500rpm!

Dang!

So much for the 230hp/360tq GM quotes!
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Old 01-17-2018, 09:49 PM   #2051
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With the Holidays and all I hoped to crank on with some stuff...
Business was brisk tho, and a couple of new Insurance groups had me busy.

I had plans to remove the Cummins engine block from the Range Rover, but that fell apart when I managed to "Misplace" the only keys we have for it, leaving it stranded on the street... I had to order a new Key from RR in England, and naturally nobody was in any rush to ship that!
The Key arrived when we were in AZ visiting family, and whilst the 800 mile round trip in the GF's ML Diesel was fun and netted almost 30mpg@75mph, the Flu I came down with right after had me in bed for over a week.
I'm still struggling with cold sweats and weakness.... it so bad I have had not had any alcohol for 9 days now!
I did drop almost 15lb tho!
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Old 01-18-2018, 06:59 AM   #2052
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Take it easy Steve, I've heard this flu is a nasty one!
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Old 01-23-2018, 06:50 PM   #2053
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Slowly getting my strength back, doing some stuff.
Got the Cummins block out of the Range Rover.
Boy that thing is beefy.
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That done, I pulled the oil pan, crank, rods and pistons.
#1 piston was as expected, but everything else looks manageable.
The other 5 pistons have minor scuffing on the skirts, and the crank bearing surfaces will probably polish out.
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Everything about this engine is massive and beefy. I lifted out the crank and it feels like it weighs 150lb! The piston wrist pins are like 1 1/2” diameter!

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Old 01-23-2018, 06:54 PM   #2054
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Oh, also added a 16t Battery Cable Crimper to the toolbox. $35 shipped.
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Old 01-24-2018, 05:51 AM   #2055
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Originally Posted by Keyair View Post
Oh, also added a 16t Battery Cable Crimper to the toolbox. $35 shipped.
Attachment 302903
I picked up one of those back when I started my coach wiring. Not a bad tool for the price.
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Old 01-24-2018, 07:35 AM   #2056
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Thanks, just got the same crimper from Walmart.com $28.88 shipped, always wanted one, now I can sell my hand crimper that I bought for $175.00 used for $100.00 and put the extra money in the gas account ! Regards, Bob
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Old 01-24-2018, 09:31 AM   #2057
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1989 34.5' Airstream 345
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Towing a 345 LE?

Quote:
Originally Posted by ScrapIrony-2 View Post
the wrecker came out, it was a flatbed(don't let them tow you with a conventional wrecker-it will rip your bonnet)
Forgive my ignorance, but what exactly is ScrapIrony referring to with "bonnet". Conventional wrecker=wheel lift? presumably from the front?
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Old 01-24-2018, 09:56 AM   #2058
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Originally Posted by wimpy View Post
Forgive my ignorance, but what exactly is ScrapIrony referring to with "bonnet". Conventional wrecker=wheel lift? presumably from the front?
My English is kinda limited, as far as I know "bonnet" is the hood of a car but "rip your bonnet" might have some other meaning. Anyhow, members here have reported damage to tag axle mounts after being towed with a wheel lift.
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