something's knocking on (or in) the engine
Safety Car
Joined: Oct 1999
Posts: 4,101
Likes: 10
From: NorCal
As far as the oil pressure goes, it'll be fine with a bad rod (the very last thing to get oil), but low with a bad main. If you don't find anything in the top end, which tends to be more 'rattle' or loud tapping than knock, consider pulling the pan. It's a fairly easy job on a C-3, and if it's a rod it'll be easy to find. I wouldn't run it any more than absolutely necessary until you find the cause. Be a bummer to ventilate the block!
Hans
Hans
Thread Starter
Burning Brakes
Joined: Oct 1999
Posts: 1,047
Likes: 1
From: Arlington Texas
Well tonite I hope to get a better idea of where the noise is coming from. If I can't pinpoint it, I'm gonna drain the oil and open the filter and look for metal shavings.
Unfortunately, I'm going out of town this weekend so anything more in-depth is going to have to wait till next week.
Unfortunately, I'm going out of town this weekend so anything more in-depth is going to have to wait till next week.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by Shrike
Well tonite I hope to get a better idea of where the noise is coming from. If I can't pinpoint it, I'm gonna drain the oil and open the filter and look for metal shavings.
Unfortunately, I'm going out of town this weekend so anything more in-depth is going to have to wait till next week.
Unfortunately, I'm going out of town this weekend so anything more in-depth is going to have to wait till next week.
Take your time, don't rush, and don't stop looking if you find something it COULD be. It's easy to see when rod bearings are worn and slapping. Look for wear, and while you have the pan off, and you're looking at them, have a buddy turn the crank by hand. Back and forth like he was pretend driving a steering wheel. You should see some play in one or some if there is a bad bearing. Remember, if they were fine they would be tight and not give any in any direction.
Thread Starter
Burning Brakes
Joined: Oct 1999
Posts: 1,047
Likes: 1
From: Arlington Texas
Well, after starting it up last nite and listening to it I'm about 90% certain that it was just an exhaust leak (actually several of them), but I am going to pull the oil pan anyway just to be certain.
If the bottom end looks good, I'm going to replace the headers.
And, I convinced my wife that as long as we are replacing them, we might as well put on sidepipes!
If the bottom end looks good, I'm going to replace the headers.
And, I convinced my wife that as long as we are replacing them, we might as well put on sidepipes!
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by Shrike
And, I convinced my wife that as long as we are replacing them, we might as well put on sidepipes!
OOhhh...man I'm excited for you if you are. Are you going with side mount headers and pipes or factory manifolds and pipes?
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by Shrike
Definitely going with Hookers and a set of Cobra heat shields. Still undecided about what inserts to use.
I have a link at home I'll post later. They are known to be the best for aftermarket inserts.
What will the pipe's inside diameter be?
Don't write off rod bearings yet. In fact, it would be a good idea on an engine that old to drop the crank, turn it, and replace all the bearings and crank seals.
