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Old 08-06-2004, 09:30 PM
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Connecting rod side clearence ????

Hello I am new here an would just like to say this is a great site
(vary cool) I do have somewhat of a problem however, and would like to know if anyone here can help. I just put a motor togather for my S-10 P/u it is a 9.7 to 1 .030 over 350, it went togather vary nicely, however I used a set of eagle after market connecting rods. and I have about .080 side clearence!
has anyone ever seen this before? just to be sure I bolted up a set of stock rods to one of the rod journals, and the clearence was around .016 my concern is will this cause a problem if I run this motor w/ this kind of side clearence, and if so what kind of problem.
Thanks

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Old 08-06-2004, 10:10 PM
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You got something bad wrong man. Even 0.016" is on the loose side. 0.010"-0.012" is what I shoot for. With 0.080" you won't have much oil pressure.

Larry
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Old 08-07-2004, 08:29 AM
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I would definately talk to whoever you bought the rods from to see what the spec is on those rods. .08 will cause you oil control problems due to excessive oil slinging on the cylinder walls......and that is if it will hold any oil pressure. There was a thread a while back about aftermarket rod side clearances being higher, but .08 is out of the ball park. Let us know what you find.

Chris
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Old 08-07-2004, 08:57 AM
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Something is funny here. Eagle rods are supposed to measure .940" big end width (each). Check yours, maybe someone previously has "worked" on them.

Stock clearances are spec'd at .010"-.020". I've seen them as tight as .004".

Manley tells me that .035" with their rods is not uncommon and poses no problems.

tom
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Old 08-07-2004, 11:40 PM
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How is .080" side clearance going to cause an oil pressure drop if the bearing clearance is only .0025"?
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Old 08-08-2004, 07:27 AM
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The big end of the rod will wiggle side to side enough to form a crown on the center of the bearing. Not mention what it does to the small end and the pins. Oil pressure is gone and so is the finish on the crank.

Larry
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Old 08-08-2004, 07:41 AM
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It won't last long with that much clearance, send them back.
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Old 08-16-2004, 04:38 PM
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rod problem solved/ Thanks!!!

Hi guys, well I asked around to some of the motor heads here in my local area, and they told me the same thing,"that this kind of clearence will not be a good thing, anyhow I took my shortblock back apart, and reassembeled it with a set of manley rods, the side clearence is now around .008, and I am happy, I called eagle and they said that those rods are most certanly defactive and I sent them back, Thanks so much for all your help you guys are a great sounding board I like haveing other hot rodders to bounce my questions and problems off of, have fun and stay safe until next time.
Regards Ktorr22

Quote:
Originally posted by TurboS10
I would definately talk to whoever you bought the rods from to see what the spec is on those rods. .08 will cause you oil control problems due to excessive oil slinging on the cylinder walls......and that is if it will hold any oil pressure. There was a thread a while back about aftermarket rod side clearances being higher, but .08 is out of the ball park. Let us know what you find.

Chris
Hello Chris: I got the rod problem taken care of, thanks, I looked at your profile mainly because I am building a 93 S-10 and thought you may be able to help me w/ tips on my install, I havent started it yet, but when I do I might just rattle you cage now and than for some advise, and buy the way your truck is vary cool ! ! I like it, good job, I will be in touch.
Thanks so much
Kterr22

Last edited by ktorr22; 08-16-2004 at 04:38 PM.
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Old 08-16-2004, 07:20 PM
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Re: rod problem solved/ Thanks!!!

Quote:
Originally posted by ktorr22



Hello Chris: I got the rod problem taken care of, thanks, I looked at your profile mainly because I am building a 93 S-10 and thought you may be able to help me w/ tips on my install, I havent started it yet, but when I do I might just rattle you cage now and than for some advise, and buy the way your truck is vary cool ! ! I like it, good job, I will be in touch.
Thanks so much
Kterr22
Thanks and No problem. I can talk about cars and trucks indefinately. Anything I can help with I would be glad to share. Lord knows I have made my share of mistakes with my junk.

Chris
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