Rod Bearing Failure?
#1
Drifting
Thread Starter
Join Date: Jul 2003
Location: Golden, CO
Posts: 2,163
Likes: 0
Received 0 Likes
on
0 Posts
Rod Bearing Failure?
Hey Guys-
Last Friday, I took the 951 down to Pueblo (50mi. away) to help Daniel951 on his car. It ran very well all the way down. After about six hours of work on Daniel's car, I started her up to go home. I got about four miles away and started to hear a knocking noise when I accelerated. I turned around to go back to see what the noise could be... During the drive back, I could tell the knocking only happened from 2000-3000 RPM and ONLY under acceleration... No other time. I got back to Daniel's house and listened to the engine with a broom handle. We had to rev the engine in the 2000-3000 range to get it to make the noise still. The sound sounds like it is coming from the oil pan area/bottom of the engine. It SOUNDS like a rod bearing just fell out and the rod cap and rod journal are just knocking on the camshaft. But I figured if that happened it would knock all the time. It doesn't do it on idle nor when it is cold. Oil pressure is fine at all times. I was seeing about 2 BAR at idle and about 5 BAR at 3k+. After the turbo drained all my coolant into the crankcase, I wouldn't be surprised if a bearing spun. Any thoughts?
Last Friday, I took the 951 down to Pueblo (50mi. away) to help Daniel951 on his car. It ran very well all the way down. After about six hours of work on Daniel's car, I started her up to go home. I got about four miles away and started to hear a knocking noise when I accelerated. I turned around to go back to see what the noise could be... During the drive back, I could tell the knocking only happened from 2000-3000 RPM and ONLY under acceleration... No other time. I got back to Daniel's house and listened to the engine with a broom handle. We had to rev the engine in the 2000-3000 range to get it to make the noise still. The sound sounds like it is coming from the oil pan area/bottom of the engine. It SOUNDS like a rod bearing just fell out and the rod cap and rod journal are just knocking on the camshaft. But I figured if that happened it would knock all the time. It doesn't do it on idle nor when it is cold. Oil pressure is fine at all times. I was seeing about 2 BAR at idle and about 5 BAR at 3k+. After the turbo drained all my coolant into the crankcase, I wouldn't be surprised if a bearing spun. Any thoughts?
#2
Instructor
Join Date: Mar 2002
Location: Waterloo, Ontario
Posts: 243
Likes: 0
Received 0 Likes
on
0 Posts
Yup sounds like the same problem when my rod bearings went. Only a certain RPM in the beginning. Do not start your car again. Drain some of your oil and check for debris. If your bearings are going you will see metal in the oil.
-R.B.
-R.B.
#3
Drifting
Thread Starter
Join Date: Jul 2003
Location: Golden, CO
Posts: 2,163
Likes: 0
Received 0 Likes
on
0 Posts
Thanks RB... I will know more when I get home in a week and open her up. Anyone in CO up for an engine pulling party?
P.S. What is the average cost of a rebuild if you do it yourself (except machining, etc.)?
P.S. What is the average cost of a rebuild if you do it yourself (except machining, etc.)?
#4
chris i might be willing for the engine pulling party because it looks like i have alot ot o do if the guy gives me my money back to do myself. Check out my tread so you know what i am talking about
#7
Drifting
Thread Starter
Join Date: Jul 2003
Location: Golden, CO
Posts: 2,163
Likes: 0
Received 0 Likes
on
0 Posts
#2 Rod Bearing...
I don't think the belts are supposed to be this loose... They flop around...
Bearing Flakes - The new cereal craze that's sweeping the nation!
One unrelated problem... My rotor keeps burning up! This one has about 3k on it... The one previous to replacing this one was a black, melted stump of plastic! Need to replace my coil?
I don't think the belts are supposed to be this loose... They flop around...
Bearing Flakes - The new cereal craze that's sweeping the nation!
One unrelated problem... My rotor keeps burning up! This one has about 3k on it... The one previous to replacing this one was a black, melted stump of plastic! Need to replace my coil?
Trending Topics
#10
Drifting
Thread Starter
Join Date: Jul 2003
Location: Golden, CO
Posts: 2,163
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by NZ951
I am there in spirit Chris... thing is I know most everyone of us has gone through this or will at some stage...
I am there in spirit Chris... thing is I know most everyone of us has gone through this or will at some stage...
Thanks NZ! I just hope the rebuild doesn't exceed $3k then I'm really screwed. (3k is my spending limit on the good ol' Visa)
The rotor seems a little strange to me... The spark is not jumping off the top plate like it should... not sure why. Anyone else have this problem?
#11
Race Director
3K? I cant see how it could, expecially if you are doinf some of the labour. I got a quote for a rod bearing job on my car when I heard a knocking, and it was USD600. I imagine you are getting more goodies at the same time?
#13
Nordschleife Master
Originally posted by NZ951
3K? I cant see how it could, expecially if you are doinf some of the labour. I got a quote for a rod bearing job on my car when I heard a knocking, and it was USD600. I imagine you are getting more goodies at the same time?
3K? I cant see how it could, expecially if you are doinf some of the labour. I got a quote for a rod bearing job on my car when I heard a knocking, and it was USD600. I imagine you are getting more goodies at the same time?
The extra $s will go to repairing the damage to the crank.
I had mine redone with my new pan gasket, this happens too often to take a chance.
#14
Drifting
Thread Starter
Join Date: Jul 2003
Location: Golden, CO
Posts: 2,163
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Peckster
It might have been $600 if he'd shut it off as soon as he heard a knock, but it was probably already too late.
The extra $s will go to repairing the damage to the crank.
I had mine redone with my new pan gasket, this happens too often to take a chance.
It might have been $600 if he'd shut it off as soon as he heard a knock, but it was probably already too late.
The extra $s will go to repairing the damage to the crank.
I had mine redone with my new pan gasket, this happens too often to take a chance.
I plan to rebuild the whole thing while it is out. Long-block + seals + multi-angle valve grind + P&P + etc... Maybe lighten crank and flywheel - and clutch job... We'll see how much that will end up costing. I hope I don't need a new crank and rods but I might.