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LDT 465 1C engine noise

rlp094

New member
Steel Soldiers Supporter
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1
Location
Washington New Jersey
Engine noise

Have this same noise in my M35A2. Thought it may need valve adjustment. Took it to a diesel mechanic for adjustment and he found that one lobe on no 1 camshaft was worn down about a 1/4". He said it may go 10,000 miles before it finally misfires. Otherwise seems to run fine.
 

Jeepsinker

Well-known member
5,341
328
83
Location
Dry Creek, Louisiana
Cam wear will eventually happen in all of our trucks because motor oil these days has no ZDDP in it to speak of. Mine recently developed a ticking sound too, and if it is because of cam wear then that would explain why my truck is down on power. I swapped my injectors out today and it didn't get any better.
 

rustystud

Well-known member
9,071
2,387
113
Location
Woodinville, Washington
Cam wear will eventually happen in all of our trucks because motor oil these days has no ZDDP in it to speak of. Mine recently developed a ticking sound too, and if it is because of cam wear then that would explain why my truck is down on power. I swapped my injectors out today and it didn't get any better.
You can take the valve covers off and check the total valve lift by measuring how much the valves move downward with a dial indicator. This way you will know that your cam is either bad or that you have another problem.
I always add a "ZDDP" additive to my oil every oil change.
 

Wildchild467

Well-known member
Steel Soldiers Supporter
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56
48
Location
Milford / Michigan
I like to adjust the valves and see where they are at. Pushing down with a wood block is only going to cause clearance at one end or another... like a teeter totter (spelling?). its the cheapest thing you can do and a good PM activity.
 

jacklegjim

Member
91
3
8
Location
Lebanon,Tennessee
I have been trying to focus on getting this truck finished and fixing the engine noise so I can make my first trip to the GA rally with it this fall.
I ordered a set of rod bearings and rod bolts because that's what I thought the problem was. After pulling the pan and inspecting the bearings
all is good on the bottom end. So I pulled the rear head and the top of number 6 piston has melted away.
So now I am looking for a piston and liner. So far all I can find is the three ring LDS piston. I want to replace it with four ring piston.
This is a good running engine it started this past winter at 9 degrees like it was warm.I have not had it on the road yet because it was not running
when I got it and the engine has been making the noise since I have had it. I just wanted to give an update on the cause of the noise.
Jim
 

Attachments

brianp454

Member
572
11
18
Location
Portland, OR
That's too bad, sorry for your loss. Are you sure the piston oiler(s) are spraying on the back side of that cylinder? I'm curious as to why only that one cylinder.
 
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