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Re: Horrible Sound from my 261. Part 2.
Wally / Montana #1376518 Wed Sep 09 2020 05:34 PM
Joined: May 2001
Posts: 1,524
W
Shop Shark
A lot to think about for sure. We're heading out of town for a few weeks so I'll have to hit the pause button on this. I might pull the side cover first and look around. That's about the last thing I can do before going deep.

Thanks all. I'll be back.


1948 3/4-Ton 5-Window Flatbed Chevrolet [sandeace.com]

28 Years of Daily Driving but now on hiatus. With a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
Re: Horrible Sound from my 261. Part 2.
Wally / Montana #1376522 Wed Sep 09 2020 06:07 PM
Joined: Jan 2013
Posts: 1,662
S
Shop Shark
I was shocked it wasnt your balancer, but I have been thinking about this over and over again. We havent given up on you. Worst thing is it comes apart for a complete look see, which I assume others have said and you are now contemplating

Steve


1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
https://www.youtube.com/watch?v=Bli...n05i04t1aokgm4p04jiwgffwhyyih5xbk0h00410
1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration
Re: Horrible Sound from my 261. Part 2.
Wally / Montana #1376524 Wed Sep 09 2020 06:17 PM
Joined: Jan 2013
Posts: 1,662
S
Shop Shark
Another thing, I just went through a 261 and a complete rebuild was cheap cheap cheap. Magnufluxing Machining Boring Honing the block and crank turning was very reasonable here in Gig Harbor Washington. You will like a new Best rear main seal too. Does the engine owe you anything at this point? If not, give it a go through. Rod and main bearings are $150 PISTONS $260 SET, RINGS $60, cam bearings $30 gasket set $50

Last edited by sstock; Wed Sep 09 2020 06:18 PM.

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
https://www.youtube.com/watch?v=Bli...n05i04t1aokgm4p04jiwgffwhyyih5xbk0h00410
1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration
Re: Horrible Sound from my 261. Part 2.
Wally / Montana #1377247 Wed Sep 16 2020 04:49 AM
Joined: Jul 2014
Posts: 234
1
Shop Shark
HRL, Don't they make those tools for rolling out main bearings anymore? Mine are a shaft the size of the oil hole in the crank with a flat tee head at an angle to match the oil hole. They're made of aluminum. If they're no longer made, I'd better treat mine real well. I imagine I'll do an in-frame again before I die.


51 3800 PU, 55 235 (w/cam, headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.
Re: Horrible Sound from my 261. Part 2.
Wally / Montana #1377250 Wed Sep 16 2020 07:11 AM
Joined: Nov 2001
Posts: 1,720
D
Shop Shark
I’ve used a 16p nail , just the head and about 1/4” of the nail shank. True hillbilly, shade tree there,man

Re: Horrible Sound from my 261. Part 2.
Wally / Montana #1377251 Wed Sep 16 2020 07:26 AM
Joined: Nov 2001
Posts: 1,720
D
Shop Shark
Just for git’s and shiggles now that you have the pan off, check the bottom inside surface of the oil pan, in the front section, like where the 2nd 3rd or 4th rod would be possibly hitting the pan?
I once bought a car REAL CHEAP because of that one day.
Took it home, hammered out the pan, and drove on,,,,,,,,,,,,,

Re: Horrible Sound from my 261. Part 2.
Wally / Montana #1377279 Wed Sep 16 2020 02:05 PM
Joined: Feb 2004
Posts: 21,018
H
Boltergeist
Tommy, I've owned a couple of sets of those main bearing roll-out tools over the past 50 years, and about the time I need one I find that the one with the correct angle to fit the crankshaft oil passage I'm working with has been misplaced, or borrowed and not returned. On the other hand, I've got a bin full of cotter pins!
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: Horrible Sound from my 261. Part 2.
Wally / Montana #1377392 Thu Sep 17 2020 08:50 AM
Joined: May 2006
Posts: 861
T
Shop Shark
I agree, a dented oil pan can create a heck of a clanging sound. Put a 261 on the stand to run it in, and whoa... overlooked that when I changed out an oil pan.

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