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Re: 73 W100 Drivetrain vibration [Re: northcoastmopar] #2902785
03/25/21 07:25 PM
03/25/21 07:25 PM
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ruderunner Offline
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who is doing the tank? Local?


Angry white pureblood male
Re: 73 W100 Drivetrain vibration [Re: ruderunner] #2902875
03/26/21 06:05 AM
03/26/21 06:05 AM
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Cleveland, Ohio
northcoastmopar Offline OP
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Originally Posted by ruderunner
who is doing the tank? Local?


Thomas Radiator in Elyria.

Re: 73 W100 Drivetrain vibration [Re: northcoastmopar] #2908987
04/11/21 10:17 AM
04/11/21 10:17 AM
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Cleveland, Ohio
northcoastmopar Offline OP
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Got the nasty lump of grease out of the truck. Now time to clean it up and put the correct brackets on it. A helpful board member is setting me up with a a 4bbl spreadbore intake on the cheap so going to put a new Edelbrock 650 on it with electric choke.

Pics show the mickey mouse engine mounts. Also, what is truly the dirtiest engine I've ever messed with.

As suggested, I'm going to replace valve seals. Since I'm this far wondering if I should just yank the heads to do so. That way I can check out the cylinders. The engine ran ok before I yanked it, some smoking at start up but otherwise ran smooth with no noises.

IMG_1838-1.jpgIMG_1863.jpgIMG_1870.jpgIMG_1871.jpg
Re: 73 W100 Drivetrain vibration [Re: northcoastmopar] #2908998
04/11/21 10:56 AM
04/11/21 10:56 AM
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UPPER MICHIGAN, MARQUETTE COUN...
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If it ran real good before I would just replace the valve seals. The one thing you could still do is remove the rockers and plugs and do a leak down test.

Re: 73 W100 Drivetrain vibration [Re: NITROUSN] #2909055
04/11/21 01:09 PM
04/11/21 01:09 PM
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Alberta
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440_Offroader Offline
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Originally Posted by NITROUSN
If it ran real good before I would just replace the valve seals. The one thing you could still do is remove the rockers and plugs and do a leak down test.


iagree

The more you take apart, the more you're going to fix. Before you know it, you'll have it down to a bare block! I know it's hard to leave good enough alone.

Re: 73 W100 Drivetrain vibration [Re: 440_Offroader] #2909085
04/11/21 02:33 PM
04/11/21 02:33 PM
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ruderunner Offline
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The Edelbrock carb will probably need an adapter to fit the intake. Does Edelbrock make a spread bore carb?


Angry white pureblood male
Re: 73 W100 Drivetrain vibration [Re: ruderunner] #2909194
04/11/21 07:33 PM
04/11/21 07:33 PM
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Freeport IL USA
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That motor isn't too bad, at least you can still see the bottom row of head bolts. The intake ports are very oily, which would indicate to me the bottom of the intake gaskets were probably leaking. The oil on the outside is pretty standard big block stuff, especially the ones with the factory hipo exhaust manifolds they cook the cover gaskets. Buy the high temp valve cover gaskets, or you will get real good at changing those gaskets.

I think, were it me, I would see how much slop the timing chain & gears have. Pop the dist cap off, and rotate the motor in one direction for a short distance, then stop, mark the rotor position, and change the direction of rotation and see how many degrees of crank rotation you get before the rotor moves. There should be very little distance, if it seems like a lot, I'd pull it down and change the timing chain and gears. Those 2 bbl big blocks came with a plastic coated cam gear and time is usually not good to them, the miles don't seem to be a problem until the mileage gets near the 100,000 mile mark. Over time, the plastic gets hard and starts to break off and the timing gets sloppy and the plastic tends to plug up the oil pick up screen.

Intake gaskets, timing chain and gears, and the oil pump pickup screen are the things that most concern me about the old big blocks. The valve seals would be somewhere down the list, but those seals are a lot older then they were when I was playing with a big block. Gene

Re: 73 W100 Drivetrain vibration [Re: poorboy] #2909222
04/11/21 08:40 PM
04/11/21 08:40 PM
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Central Florida
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I pulled 360 from my '79 W150 to get to those two rear freeze plugs, and did them all. It was either pull TC or pull engine. Did all freeze plugs, timing chain (dbl), intake gasket, valve covers, valve seals, water pump, and left every else alone. It ran well before but leaky. Mainly wanted to get those freeze plugs, did the other stuff while out.

Oil pan.JPG

Facts are stubborn things.
Re: 73 W100 Drivetrain vibration [Re: larrymopar360] #2909365
04/12/21 07:57 AM
04/12/21 07:57 AM
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Cleveland, Ohio
northcoastmopar Offline OP
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ruderunner I'll need to get an adaptor plate for mounting square bore onto spread bore. I'll also need to figure out the kick down linkage. If you are around this coming weekend I'll run by and get those parts.

poorboy I planned to check the timing gear, I just may yank the water pump housing and timing cover and replace chain if needed. I'm replacing oil pan gasket so might as well do timing cover gasket.

I'm yanking all of the A/C stuff so I'll need to come up with some alternator and power steering brackets and maybe a crank pulley.

Also discovered that the front core plug on one of the heads seems to be filled with epoxy.....

IMG_1876.jpg
Re: 73 W100 Drivetrain vibration [Re: northcoastmopar] #2909637
04/12/21 11:12 PM
04/12/21 11:12 PM
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Freeport IL USA
poorboy Offline
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Originally Posted by northcoastmopar
ruderunner I'll need to get an adaptor plate for mounting square bore onto spread bore. I'll also need to figure out the kick down linkage. If you are around this coming weekend I'll run by and get those parts.

poorboy I planned to check the timing gear, I just may yank the water pump housing and timing cover and replace chain if needed. I'm replacing oil pan gasket so might as well do timing cover gasket.

I'm yanking all of the A/C stuff so I'll need to come up with some alternator and power steering brackets and maybe a crank pulley.

Also discovered that the front core plug on one of the heads seems to be filled with epoxy.....






That would be one way to stop the core plug from leaking.

Re: 73 W100 Drivetrain vibration [Re: poorboy] #2912234
04/20/21 11:15 AM
04/20/21 11:15 AM
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Cleveland, Ohio
northcoastmopar Offline OP
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Well I’m done taking things apart now I’m on to putting it back together.

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Re: 73 W100 Drivetrain vibration [Re: northcoastmopar] #2912414
04/20/21 04:32 PM
04/20/21 04:32 PM

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as long as yer this far: hi vol oil pump.

given the choice between epoxy and rubber, I'd go epoxy.

too late now but there's a guy in the ads section selling truck mounts - lots of pics of the different styles.

skip the adapter plate, scrounge up a TQ

a/c delete alternator brackets will be a fun hunt. try face book, lots of parts trucks there.

I generally use air to keep the valves shut when doing seals. Also a decent way to check if they're closing all the way / cracked. Last big block I did had enough carbon built up to keep a few of them part way open. Pulled them all and chucked them in a drill to clean em up.

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