GRD214 engine "clatter"


The old and reliable.

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Post Mon Mar 20, 2023 11:01 am

GRD214 engine "clatter"

Help!
Pappy Vance would probably know...
Problem: The GRD214 in my '49KB1 has been "rebuilt" with new rod bearings and the oil pressure relief valve cleaned - the valve was gunked up and not functioning properly. Oil pressure had was impeded and messed up the rod bearings.
Now when driving the oil pressure is maintaining at 20 as it should.

That said, the engine has "clatter" that sounds like a diesel when warmed up and during acceleration at certain rpms. I'm not sure the clatter is symptomatic of the oil pressure while the truck is running. I've read the treads in this Forum on oil pressure and haven't found a similar symptom. The noise I'm hearing may be addressed somewhere else that I haven't
seen.

On International Binder Trucks FaceBook page one person said: Your clatter issue could be as stated wrong size bearings,
Could be a sloppy timing chain if the tensioner wasn't installed correctly,
use a stethescope and see if you can isolate or locate main noise source,
I would go from there.

My mechanic and I are perplexed. Anyone have suggestions?
Thank you!

Golden Jubilee
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Post Mon Mar 20, 2023 6:21 pm

Re: GRD214 engine "clatter"

20 psi while driving? That sounds to low, 20 psi idleing would be ok.
The oil pressure relief valve can stick open, but being junked up wouldn't cause low oil pressure, rather if it didn't open the pressure would rise with rpm and exceed normal pressure.
My guess is bearing clearances.

Golden Jubilee
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Post Tue Mar 21, 2023 12:24 pm

Re: GRD214 engine "clatter"

Got to where my manual is. Spec is 5-10 psi at idle, and 20-30 at 1500 Rpm, If you don't have those figures, hot then I would look to bearing clearance. There are many things the CAN cause low pressure and "rattle" but bearing clearance is the most common.
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Golden Jubilee
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Post Tue Mar 21, 2023 12:39 pm

Re: GRD214 engine "clatter"

use a stethoscope to isolate where the sound is coming from if you can,

that gives you a place to start, if it sounds like lower end, plastigage your bearings
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Post Tue Mar 21, 2023 2:50 pm

Re: GRD214 engine "clatter"

Thank you all for your thoughts and suggestions!
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Golden Jubilee
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Post Tue Mar 21, 2023 7:32 pm

Re: GRD214 engine "clatter"

Pappy Vance or Brian
Pappy he was one of the best for sure..

I got my money on nikkinutshop or
cornbinder89 stethoscope too, good thoughts

This site has some good talent for sure

Good luck with it

Golden Jubilee
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Post Tue Mar 21, 2023 8:53 pm

Re: GRD214 engine "clatter"

I am going with CB89. Thanks for the vote of confidence.
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Golden Jubilee
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Post Thu Apr 06, 2023 6:02 am

Re: GRD214 engine "clatter"

If your bearings were messed up by the previous condition maybe your crank was damaged also , did you have it checked ?

Golden Jubilee
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Post Thu Apr 27, 2023 11:49 am

Re: GRD214 engine "clatter"

Plastigage. Brings back memories; Dad advised that I use Plastigage on my first attempt at engine rebuilding. I did as suggested on a 1950 Chevy 216 c.I. Six. All went well until rod started knocking after only five miles. Guess I should not have tried to hold a used crankshaft to new factory specs. Did another later on and used the advantage of the spacing shims on the the connecting rods and eased my way from a little rattle to a smooth runner. As life went on I learned a bit about micrometers ( machine shop ). After that measuring first became quite a habit.

What ever happened to Babbitt bearings and spacing shims ? We’ve come a long way..now they tune cars between races with a computer . I’m actually laughing at very,very old I actually am !

Good luck with the rattle. If nothing else we will all learn something from your post.

BK

Golden Jubilee
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Post Thu Apr 27, 2023 2:03 pm

Re: GRD214 engine "clatter"

Bobby K1 wrote:P

What ever happened to Babbitt bearings and spacing shims ? We’ve come a long way..now they tune cars between races with a computer . I’m actually laughing at very,very old I actually am !

Good luck with the rattle. If nothing else we will all learn something from your post.

BK

IHC never used Babbitt bearings in the engine they designed, they were insert bearings from the get-go. Only Chevrolet was foolish enough to keep using it into the 50's, their sister GMC used insert.
When doing a stove bolt 6, don't forget to put the dipper back on the rod end, it will clatter for sure without them.
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