rod bearing failure ALL RODS. need some advice
#1
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Thread Starter
rod bearing failure ALL RODS. need some advice
hi guys
my engine is a d16
with vitaras
h-beam rods (which i'm not sure if they are eagle or cdm)
i'v been runing this engine for a while now,
oil pressure was good if not great (80-90 @ cold idle startup / 15-20 psi @ hot idle / 50 psi @ 3000 rpm / 70+- at full boost)
i'm using agip 10-60 racing oil
i had some ticking noises from the engine at medium loads so i opened up the engine and found that all my rod bearings were spun/wiped/crushed.
now i'm trying to find out what caused this to happen.
i masured the oil pump
rotor to housing 0.25mm(0.009in) which is out of spec (specs are 0.20 (0.007)
inner rotor to outer rotor 0.10mm
here are the pictures of the rod bearings:
i will post pictures of the crancksaft in a few minutes
thanks
my engine is a d16
with vitaras
h-beam rods (which i'm not sure if they are eagle or cdm)
i'v been runing this engine for a while now,
oil pressure was good if not great (80-90 @ cold idle startup / 15-20 psi @ hot idle / 50 psi @ 3000 rpm / 70+- at full boost)
i'm using agip 10-60 racing oil
i had some ticking noises from the engine at medium loads so i opened up the engine and found that all my rod bearings were spun/wiped/crushed.
now i'm trying to find out what caused this to happen.
i masured the oil pump
rotor to housing 0.25mm(0.009in) which is out of spec (specs are 0.20 (0.007)
inner rotor to outer rotor 0.10mm
here are the pictures of the rod bearings:
i will post pictures of the crancksaft in a few minutes
thanks
#3
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#4
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Re: rod bearing failure ALL RODS. need some advice
looks like bearing seasure to me. What does the crank look like? I there bearing material fused to the crankshaft? Your oil pressure was good but possibly your bearing clearances were a little tight. Or you had a brief moment where the oil pump cavitated and dropped oil pressure.
#5
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Re: rod bearing failure ALL RODS. need some advice
You have to be careful with racing oils as they usually don't have any additives in them. 10w-60??? are you serious?
#6
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Re: rod bearing failure ALL RODS. need some advice
http://www.nb-cofrisa.com/docs/web_fallos_ing.PDF
google engine bearing failure i think those looks like detonation some people call it over load failure.
google engine bearing failure i think those looks like detonation some people call it over load failure.
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#8
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Re: rod bearing failure ALL RODS. need some advice
usually #4 goes out first followed by the rest after a while; i've seen two D's die on #4 as that is the last rod in line to get any oil.
One was my built Z6 years ago, oil clearances were spot on, used ACL std bearings had probably 1500mi on the motor; it overboosted on pump gas probably detonated pushing the bearing into the crank just long enough at high enough speed to weld it and spin it to pieces
that looks like maybe the clearances were a little tight or that oil did not lubricate well enough. 10-60 is a little thick even for a D; that pump may have had a hard time pushing it through. I use rotella 15-40 non-synthetic in all my motors; it seems to be the best bang for the buck and has a lot more zinc and sulpher in it compared to gasoline oils
One was my built Z6 years ago, oil clearances were spot on, used ACL std bearings had probably 1500mi on the motor; it overboosted on pump gas probably detonated pushing the bearing into the crank just long enough at high enough speed to weld it and spin it to pieces
that looks like maybe the clearances were a little tight or that oil did not lubricate well enough. 10-60 is a little thick even for a D; that pump may have had a hard time pushing it through. I use rotella 15-40 non-synthetic in all my motors; it seems to be the best bang for the buck and has a lot more zinc and sulpher in it compared to gasoline oils
#9
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Re: rod bearing failure ALL RODS. need some advice
Lets clear this thread up right now, ill help you identify your problem.
10w-60
THATS DIESEL OIL, the oil passages on a honda motor arent large enough for a 60 weight oil, thats INSANE. You should have been running 5w-30 and you could have avoided this. You starved the bearings of oil, thats why they failed.
10w-60
THATS DIESEL OIL, the oil passages on a honda motor arent large enough for a 60 weight oil, thats INSANE. You should have been running 5w-30 and you could have avoided this. You starved the bearings of oil, thats why they failed.
#10
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Re: rod bearing failure ALL RODS. need some advice
Agreed you only need to run heavier oil if your motor has really loose clearances 5w30 is perfect for the majority of honda builds.
#11
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Re: rod bearing failure ALL RODS. need some advice
the cranckshaft -looks- ok it dosnt have any fused metal parts on it,
the hp goal of the engine is 400hp but i'm only @16 PSI.
the oil was on the top of my list too but i'm still not sure. it could be fake or chinese eagle rods.
i started using it since most of the guys in my country use it on their boosted setups. probably just a hype.
ill upload pics of the cranck in 5 mins
the hp goal of the engine is 400hp but i'm only @16 PSI.
the oil was on the top of my list too but i'm still not sure. it could be fake or chinese eagle rods.
i started using it since most of the guys in my country use it on their boosted setups. probably just a hype.
ill upload pics of the cranck in 5 mins
#12
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Re: rod bearing failure ALL RODS. need some advice
you would have to check the clearances with plastiguage to determine if they were too tight, but i would attribute it to the 60 weight oil, that is COMPLETELY uncalled for, its probably like molasses when the engine is hot, im curious to see if you have damage to your cam as well
Last edited by Spawne32; 09-14-2010 at 05:37 PM.
#16
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Thread Starter
Re: rod bearing failure ALL RODS. need some advice
i'm not saying its not the oil but i know of atleast 7-10 guys that use that same oil on built daily driven d16s,
i'm not sure if the rods i had are real eagles they dont have any eagle logo on them.
thats why i opened this thread:
https://honda-tech.com/forums/forced-induction-16/does-all-eagle-rods-have-eagel-etching-2835636/
the right one is from the set i had in my engine: :S
here are some pics of the crank
comp 59300
cam journals are not worn but the lobes are kinda, again its a 59300 which are known to wear,
i'm not sure if the rods i had are real eagles they dont have any eagle logo on them.
thats why i opened this thread:
https://honda-tech.com/forums/forced-induction-16/does-all-eagle-rods-have-eagel-etching-2835636/
the right one is from the set i had in my engine: :S
here are some pics of the crank
comp 59300
cam journals are not worn but the lobes are kinda, again its a 59300 which are known to wear,
#18
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Thread Starter
Re: rod bearing failure ALL RODS. need some advice
yeah i know, it looks ok and i cant feel any scretches. but i'm still not sure if i sould reuse it or not, or maby polish it and use it... dont know yet
#21
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Re: rod bearing failure ALL RODS. need some advice
thats called damage from the metal cycling through the engine, its pretty obvious, you can also see the heavy score marks where the cam was contacting the lifter and not having enough lubrication, im curious where did you get the idea to run 60 weight racing oil in a standard production motor?
#23
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Re: rod bearing failure ALL RODS. need some advice
lol its not even a question of why, you have to use regular oil, the engine isnt designed for race oil, race oil is designed entirely different then regular oil, some additives are missing, not to mention you have flow and lubrication problems at 50 weight, let alone 60 weight.
#24
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Thread Starter
Re: rod bearing failure ALL RODS. need some advice
thats called damage from the metal cycling through the engine, its pretty obvious, you can also see the heavy score marks where the cam was contacting the lifter and not having enough lubrication, im curious where did you get the idea to run 60 weight racing oil in a standard production motor?
i started using this oil since i witness other guys use it in their engines, just for the record i have 2 friend that use this oil 3 years now on daily driven d series,
question is, if i should reuse this crank or not, ill take it to a machine shop tommorow