Silverchickn

iTrader: (1)

Well I was at the track making a couple of passes when on the 4th pass midway down the track I heard a ticking noise. The night before I let a friend drive the car and he slightly over reved the motor. He said he would replace pushrods if he bent one. No big thing and it sounded good.

After the run I pulled over next to a fellow LS1 owner and asked if he would listen to verify if it was a bent pushrod. Well checked oil and wasnt even touching the stick. Had to put 4 quarts to get it back to normal. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> Started it back up with the oil pressure needle slightly shaking. Towed it home pulled the motor and tore it down.

I checked all pushrods they were good but I spun a rod bearing on one rod and had a slight abrasion on the ring of the rod next to it (5 and 6).

The cars a 98 so I can only guess that my oil pump went and consumed the oil since there were no leaks and it wasn't smokeing.

Now the bad news. Had my crank checked out and whole crank is bent out of balance .030" and cannot be straightened. Where is a place I can get a good used stock crank. Any help would be appreciated.

Man am I having a bad day. <img border="0" alt="[cry]" title="" src="graemlins/gr_cry.gif" />

<small>[ April 21, 2003, 03:38 PM: Message edited by: Silverchickn ]</small>

DONAIMIAN

iTrader: (18)

Try ARE and see if you can exchange it for a forged shortblock. Sorry to hear this <img border="0" title="" alt="[Frown]" src="gr_sad.gif" />

cantdrv65

iTrader: (3)

An oil pump doesn't consume oil. You ran the engine seriously low on oil and this is what caused the oil pressure to drop and result in a spun bearing. These engines DO NOT like to be run low on oil. My oil pressure begins to drop off when only 1 1/2 quarts low! Check the oil VERY often when racing, Ls1's suck *** PCV can really burn quite a bit through the intake, more than you might expect. <img border="0" title="" alt="[Frown]" src="gr_sad.gif" /> Good luck.

cantdrv65

iTrader: (3)

Oh I would interrogate your friend, he probably did more than a "slight overrev"... <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

robertbartsch

My wife runs her Benz without any oil touching the stick....it took 4 quarts after a "ruff" winter (I think the total capacity is 8 quarts, however)

...she just puts gas in it and goes.....

...I don;t think this bomb leaks that much so what could be the problem....oil being sucked into the intake? How do I fix this?

Thanx...

Silverchickn

iTrader: (1)

cantdrv65 - I was in the car when it happened. It wasnt a bad over rev at all.

Well if the oil pump didnt consume it how did it consume 4 quarts in 3000 miles. Not doubting you but I had changed the oil 3k miles ago. So in theory it consumed 1.3 quarts every 1000 miles.

Sorry this just sounds a little weird to me. I didnt have any leaks and I built a catch can before the oil changed and it barely had 1/8 to 1/4" of oil in it when I pulled the motor.

Dont know but I have found a crank from MTI in case anyone else runs into this. They let a fairly new stock crank go for $150. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> Best news I have heard all day.

Got Me SOM

iTrader: (2)

oil pump circulates oil throughout the engine, IT DOESN'T CONSUME OR EAT OIL.

More than likely your rings are shot and worn and that's why you burning oil.

Could be pcv too but more than likely the rings were/are worn.

look on the bright side now you can build the bottom end the way you like.

on the dark side, its gonna cost you money but its a lesson well learned.

LS1swap

I have seen use cranks on ebay, but would be careful buying one there. You might want to post a WTB in the classified section. Maybe someone who put in a stroker would want to sell their old crank. A new crank is expensive for a 98 it is PN 12559354 I have heard something about the 98 having a different reluctor wheel than later years so that is something you might want to look into if you buy used. Don't exactly remember where I read that, so I could very well be wrong.
BTW that ticking that you heard was the piston tapping on the head. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

VINCE

iTrader: (1)

Who told you that you spun a bearing and the crank is bent?

Silverchickn

iTrader: (1)

I tore the motor down and saw the bearing that was spun. I then took the crank to a reputable machine shop in town and they told me it was bent .030". My rings didnt look that bad but I am ordering all new rings to put it back together to elminate that from having a chance to be a problem later. Also my car didnt really smoke much at all just slightly because of the ORY.

Oh well lesson learned. <img border="0" alt="[bang head]" title="" src="graemlins/gr_banghead.gif" /> the hard way.

<small>[ April 21, 2003, 06:45 PM: Message edited by: Silverchickn ]</small>

VINCE

iTrader: (1)

Sorry to hear of your bad news.. I am sure I have seen you around. I live in the Tampa Bay area.. License plates say "DaTruth"

MyLS1Hauls

iTrader: (2)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Silverchickn:
<strong> I tore the motor down and saw the bearing that was spun. I then took the crank to a reputable machine shop in town and they told me it was bent .030". </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I find it hard to believe that its "bent" from that. I could believe that one of the journals is worn .030", but bent... <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

Also, you're saying that you race the car and havent checked the oil in 3000+ miles??? No wonder you spun a bearing. You should always always check the oil before racing it.

Silverchickn

iTrader: (1)

I knew I was gonna get beat up over this but at least some of yall could give a guy a little on support a bad situation. Oh well guess I'll keep my problems to myself.

Oh yeah about the bent situation. The shop I took it to is a well know shop that has been in business for over 20 years and they are very knowledgable. I take their word when they say its bent. There were slight abrasions on the rings for the mains so sounds right to me. Also they dont sell parts they just machine them so by telling me its bent they lost $75 for not being able to turn the rod journals. So you tell me.

<small>[ April 22, 2003, 10:59 AM: Message edited by: Silverchickn ]</small>

TaTommyWS6

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Silverchickn:
<strong> I knew I was gonna get beat up over this but at least some of yall could give a guy a little on support a bad situation. Oh well guess I'll keep my problems to myself.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Dude, your situation truely sucks and I am sorry to hear about it, regardless of the cause.

Try to look at the bright side: All the shiny new pieces and how much better it will all be when its back together. Many people sink plenty of money into these cars with perfectly fine engines... At least you have a good reason to be doing it.

Good luck!

Tommy <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

notfastenough

sorry to hear about your ride <img border="0" title="" alt="[Frown]" src="gr_sad.gif" />
some times in life you need to learn the hard way. but when it comes to cars and racing this kinda thing happens, and you just gotta live with it, and move on and make a better faster motor <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> Good luck and happy motor building

Cal

iTrader: (1)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Silverchickn:
<strong>Well if the oil pump didnt consume it how did it consume 4 quarts in 3000 miles. Not doubting you but I had changed the oil 3k miles ago. So in theory it consumed 1.3 quarts every 1000 miles.

Sorry this just sounds a little weird to me. I didnt have any leaks and I built a catch can before the oil changed and it barely had 1/8 to 1/4" of oil in it when I pulled the motor.

</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well my LS1 uses almost that much oil, about one quart every 1200 miles, sometimes more sometimes less, I think it depends on how I drive it. Been that way since new and have only 12,000 miles on it now. Oil can go by the stock piston rings even with them in good condition because GM used low-tension rings to reduce friction. Make sure you don't use stock rings on your rebuild.

Pro Stock John

iTrader: (34)

There was not enough oil in the engine and you lost lubrication to the bearings. When we do an oil change we use a little less than 6 quarts.

There are a few reasons why this could have happened, you'd have to look at the pcv, and also look at your rings.

I have always suggested that drag racers run 1/2 qt over, ie. 6 qts, and also to check the oil after every 3-4 runs. It has not been unusual for me to add a 1/2 qt of oil before I leave the track back when I had a stock bottom end.

Silverchickn

iTrader: (1)

Thanks for all of the encouragement guys. So dont use the stock rings?? Should I use some 3.905 rings? I am not having the block bored or honed because it looks in good shape. I am using the stock pistons, rods and crank.

Silverchickn

iTrader: (1)

Ok here is the update with whats going on with my motor.

Heads have been glass bead blasted.
Block has been honed.

Follwing parts have been ordered and are in transit.

Used crank and 2 used rods from MTI (since I bent the crank and the 2 rods that had bearing that spun are pitted), Speed pro 3.897" rings, TR224 cam, Comp 918's, LS6 oil pump, JWIS timing chain, ARP rod bolts, Federal Mogul main bearings, Clevite rod bearings, valve stem seals, all new gaskets and seals, LS6 valley cover (PCV mod), head bolts. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

While its all tore apart im deleting the AIR and EGR. Also running the 01' coolant lines to be setup for the LS6 intake manifold when I get the money around to buying it. Would you guys have any other suggestions??

2xLS1

iTrader: (25)

You better scrub those heads till the cows comes home, then scrub them again. If any of those glass beads get in your oil, you will destroy your bearings.