Author Topic: Bolts Too Long?  (Read 296 times)

Offline stu in wichita

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Bolts Too Long?
« on: February 06, 2018 - 04:29:20 pm »
Has anyone every heard of small block cylinder wall damage due to water pump or timing cover bolts that are too long?  I've seen a couple of references to this over the years, and didn't think much about it.

I just freshened up my 318 after years of not running - new gaskets, timing chain, water pump, fuel pump, etc.  When it warms up, it has a mild "squawking" sound which seems to match the crankshaft speed.  I've checked some of the obvious things (belts and accessories, torque converter and flex plate) but everything seems okay. I've used a stethoscope, but can't seem to trace it to any particular location.

Looking at it, I can't tell which bolts would actually line up with the cylinder.  Is it even possible?  Writing this down, it sounds crazy.   

Your thoughts and advice are appreciated.


Offline 70chall440

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Re: Bolts Too Long?
« Reply #1 on: February 07, 2018 - 12:07:46 pm »
Too long of bolts could cause a number of problems depending on where they are, however I seriously doubt what you are talking about is an issue (a too long bolt applying enough pressure on a cylinder to cause deformation and problems). The amount of pressure it would take would be enormous I believe and I would think if it were possible, it would crack the block before deforming it. I think the threads on the bolt would strip before causing this problem.

To your "squawking"; remove the belt on the Alternator and start it and see if the noise goes away. If you have PS, try that as well.
Current Mopar
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Offline 73_Cuda_4_Me

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Re: Bolts Too Long?
« Reply #2 on: February 26, 2018 - 06:34:01 pm »
Is this an automatic? I've had my upper front dust cover on front of 727 transmission rub on flex plate when it didn't engage properly on top (one of my tabs was missing).

Had a tough time pinpointing that one! The flex plate bolts were barely skimming the plate, but created a nice chirp...
1973 Plymouth Cuda BS23H3B567783

R11 V6X EN2
M21 M25 M31 M88 N41 N42
V1X U B41 C56 G37 J54
JY9 A6X9 0 703 501616
E55 D34 BS23 H3B 567783