I am hoping someone can help me with were to start chasing down the knock I have. Going to try to upload the video here or put a link to it on YouTube. I appreciate any advice received. The motor is in an aircraft tug and is a 1990 225 Chrysler 225 Industrial. Thanks again.
225 Slant Six Industrial Knock
- Thread starter tspang80
- Start date
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Charrlie_S
Well-Known Member
Could be exhaust leak, valve lifter tap (is it solid or hydraulic lifters?), Flywheel/clutch/converter bolt hitting. Get a piece of heater hose, and use it like a stethoscope to try and locate where the sound is coming from.
Will try the heater hose check! Thank you for the info!
Slow the idle down and give us another video of it. Is it an automatic? It sounds a lot like loose flexplate/torque converter bolts.
I will definitely do that when I get home.
It is a 3 speed automatic. Similar to pic below.
Thank you!
Slow the idle down as far as you can so it will still run. Now, remove the plug wires one at a time and put them back. When you get the offending cylinder, it will quieten up. I believe it's either a badly cracked piston or a connecting rod bearing.
Also, unrelated, but what transmission does that have in it? I would assume a 727. But more importantly, how is the drive shaft attached? Is it a slip yoke or a bolt on yoke? I ask because we have a member, @PROSTOCKTOM that's wanting information on whether Chrysler ever made a short 727 with a slip yoke. While this is a slant 6 application, if it's a slip yoke, that would at least tell him that they did make some. Thanks.
Also, unrelated, but what transmission does that have in it? I would assume a 727. But more importantly, how is the drive shaft attached? Is it a slip yoke or a bolt on yoke? I ask because we have a member, @PROSTOCKTOM that's wanting information on whether Chrysler ever made a short 727 with a slip yoke. While this is a slant 6 application, if it's a slip yoke, that would at least tell him that they did make some. Thanks.
circlepilot
Well-Known Member
I had a 225 that I overhauled in a 66 Valiant. It had a knock (faint). I took the engine back out and found it was #6 rod tapping on the counterweight. (Side lash) Didn't find any visible damage. BTW, the knock (more like a thumping) appeared when the front of the car was higher (going up an incline or hill). I put the pan back on it put it back in the car, drove it from Florida to California, (1982) put it on a ship and drove it on the island of Guam for four years. Sold it there and as far as far as I know it may still be there. Oh yeah, the thumping never went away.
Norm
Norm
I have read that these engines are bulletproof. Part of the reason I'm not giving up on mine.
Nothing is, really. But they are quite durable. I mean, people can break an anvil if they work hard enough. lol
Charrlie_S
Well-Known Member
The anvil breaker, of course.
The anvil breaker, of course.
Below are the pictures of the transmission. I didn't find much stamped, but my father in law believes it to be a TorqueFlite. He is also convinced it is a bad rod bearing(s), but I still plan to access the flex plate to check the bolts. Thank you again for all the help and let me know if you want better pictures of the transmission.
Man, that's beautiful and THANK YOU. Although it's not a slip yoke, it's still another log on the fire and I know @PROSTOCKTOM appreciates it. Let us know what you find out on the knock!
TT5.9mag
Two atmospheres are better than one
Listen to your father in law.
slantsixdan
=..=
(also: yes, that is a Torqueflite 727.)
Slantsix64
Well-Known Member
Super six intake too. Epic
I just bet!
It's stupid low. There where some US air force cummins Dodge D350 tugs made that had 7.17:1 Dana 70s in the rear, as well as some Army K30 GMCs with 6.5 Detroits and 4.56 gears. In a dedicated tug tractor, planetary final drives and 22:1 final reduction aren't uncommon...
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If I were doing any type of serious tree work, I'd consider using one of these with some foam filled equipment tires along with a couple PTO winches on it for a "mini skidder." A lot of them have four wheel steering, AWD, and crab steering capability. They'd be perfect for pulling hard leaners away from structures.
Is it just me or is that a front diff under it? 4x4?
TT5.9mag
Two atmospheres are better than one
I could use one right now in my backyard for pulling stumps.
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