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-   -   destroyed con rod bearings - pics and description - what happened ? (http://www.hotrodders.com/forum/destroyed-con-rod-bearings-pics-description-what-happened-99229.html)

lowROLLERchevy 09-29-2006 04:56 AM

destroyed con rod bearings - pics and description - what happened ?
 
66 Attachment(s)
SHORT VERSION STARTS AFTER THE PICS......

i have a friend who, lets say, isnt very car savy. he decided to buy a turbo kit, and have it installed. he took it to a local guy and had the kit installed

the install was done after hours

the day the kit was finished, it was test driven ... HARD ... this resulted in a number of destroyed pistons, because the car wasnt tuned...

so my friend bought new internals, and had the same guys install the internals

the engine was stripped of its head, oil pan, and the rest of the components needed to get at the cylinders, the engine was honed IN THE CAR and the new pistons / rod were dropped in along w/ new rod bearings

my friend proceeded to beat the tar out of the car, still untuned .... and it soon developed a small "knock" that souned like a woodpecker pecking at aluminium ... only did it under load

he gets the car tuned, proceeds to beat the tar out of the car more, and he assumed one of the blades inside the turbo was tapping the housing

soon after, the turbo blew. oh hey look at that, he was right....

so he uses the warranty on the turbo to get it replaced ... and they tell him the turbo died because of lack of oil ...

install new turbo, and in the mean time we hack open the oil filter .... we find that each pleat has a LINE of bearing material in it .... and its not a small amount ... it looks like the car ate a rod bearing or two .... he ingores my attempts to convince him that engine is trashed ...

next day they fire up the car ..... and it once again knocks under load, but after the turbo spools you cant hear anything ...

he proceeds to ONCE AGAIN go out and POUND THE TAR OUT OF THE CAR

finaly decides to check things out ....

Here are pics of the crank..

http://www.reflectstudios.com/bearing/crank1.jpg
http://www.reflectstudios.com/bearing/crank2.jpg
http://www.reflectstudios.com/bearing/crank3.jpg

And here are shots of the bearings

This one here you can see the great oil hole
http://www.reflectstudios.com/bearing/bear1.jpg

This one here the bearing seems to be mushroomed out.
http://www.reflectstudios.com/bearing/bear2.jpg

General Shots
http://www.reflectstudios.com/bearing/bear3.jpg
http://www.reflectstudios.com/bearing/bear4.jpg
http://www.reflectstudios.com/bearing/bear5.jpg
http://www.reflectstudios.com/bearing/bear6.jpg

now its obvious why the turbo died from lack of lub ..... the engine was "bleeding" at the con rods ... leaving the REST of the engine with low oil pressure ...

so im talking to him and his buddy online after these pics are taken ....

they refuse to beleive me that the crank is shot, and that the rods are most likely dead too

apparently the front two bearings were having a backwards day .... because they were holding onto the crank, but the con rod slid back and forth across them ...

his buddy told me that they arent gonna have the rods measured / resized, and that they are FINE becuase the NEW bearings "seam to fit tight" ....but im guite sure that an ovaled rod can still APPEAR to have tight fitting bearings ..

so what do u guys think happened ? wrong size bearings ? installer error ?

1ownerT 09-29-2006 05:39 AM

I don't know about others, but I can't see the pics.

nitro_baller4692 09-29-2006 06:04 AM

nope no pics.

astroracer 09-29-2006 06:06 AM

Pictures or not, the motor needs to be pulled and EVERYTHING checked. Running that much bearing material through it has trashed every bearing and bearing surface so they need to be cleaned up.
Blowing out bearings has he did sounds like there was some severe detonation under load and the bearings were simply pounded out. There is no doubt in my mind that there are a couple of egg shaped connecting rods in the pile.
I think you need to just let it go. It's obvious these two guys don't need anyones help or advice and they will just do what they gotta do anyway. Leave them to their own devices and they'll get tired of f'n with it...
Mark

nitro_baller4692 09-29-2006 06:26 AM

what engine are we talking about?make,model ,and year

k-star 09-29-2006 06:39 AM

bearings
 
I can't see the pictures either,,, but i really don't need to...

This quote from you

"the day the kit was finished, it was test driven ... HARD ... this resulted in a number of destroyed pistons, because the car wasnt tuned...

so my friend bought new internals, and had the same guys install the internals

the engine was stripped of its head, oil pan, and the rest of the components needed to get at the cylinders, the engine was honed IN THE CAR and the new pistons / rod were dropped in along w/ new rod bearings "

Is where the problem started... You CANNOT get an engine clean enough after parts breakage letting it in the car...then to hone the cylinders on top of that put all the honing grit in places that you cannot clean while the block is in the chassis...

IMO your buddy needs to find a different shop....

Keith

docvette 09-29-2006 07:29 AM

Doc here, :pimp:

Personally, I'd leave "Stanley and Ollie" to their own devices..

Since everything you have reported is counter to good engine building and break in ..

Just send them an email and say..Let me know when you get it running for more than 48 hours..and turning up the CD don't count as "a no Knock" cure..

Doc :pimp:

bigbadbowtie 09-29-2006 07:44 AM

Thats some serious DAMAGE.......Im shocked that thing still ran.

I would say the bearings are DEAD do to heavy detonation and having metal in the oil passages from the 1st mishap.

I have NO doubt the rods will need to be resized and the crank turned...

Lonestar 09-29-2006 08:12 AM

Just what kind of "shop" did the work? A landscape service or something?

If the owner is your "friend", then hit over the head a couple of times with his "seemingly tight" rods...

Sometimes it takes a good friend needs to knock sense into someone.

I concur with everyone else, detonation, improper break-in and lack of lubrication has caused this. Time to start over, and not with the same "shop".

Mick_in_Oz 09-29-2006 08:13 AM

I agree with Mark... The destroyed bearings may very well be from way bad detonation and the fore mentioned bad clearences from the unmeasured rods etc... I bet the cam bearings are looking very sad also.

Showing is better than telling, and hey, you already know they arent gonna listen...

Ignorance and forced induction simply dont go together!!!

nitro_baller4692 09-29-2006 08:20 AM

if they won't listen then let them learn on there own.
i would not get involed with that problem,there just throwing go money after bad.

jray 09-29-2006 09:16 AM

Quote:

Originally Posted by Lonestar
I concur with everyone else, detonation, improper break-in and lack of lubrication has caused this.

Don't forget the gross stupidity of that equation..... :rolleyes:

k-star 09-29-2006 10:04 AM

bearings
 
IMO it's all totally dirt related... I am not sure it ran long enough for detonation to do that much damage...

Rebuilding an engine in the chassis is like putting perfume on a pig!!!!!!


Keith

DV8 09-29-2006 10:17 AM

oil pressure
 
I've seen worse cranks, but for a 1 day old bearing thats ugly!! I wiuld suspect oil pressure failure also. if the rods were bleeding that tells me the rods werent "tight" Im suprised he had enough pressure to maintian lifter operation I bet he did some damage up top as well. And would you really trust the rods after bangning them around in there, you know the engine will always let loose at the weakest link. :nono:

johnsongrass1 09-29-2006 10:48 AM

You CAN do that kinda bearing damage in one day. If even in a half aday. Even in a few minutes.

Dirt scarred the crank and scored the bearing, detonation knocked the inner layer off of it.

http://www.engineparts.com/it_bearingfailures.asp#


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