Engine knock, already?!
2nd Gear Member
Joined: Jun 2006
Posts: 181
From: West Virginia
RE: Engine knock, already?!
Im not sure how many miles were on it. a million maybe? Also, one of the valves was stuck closed, causing a pushrod to bend and fall into the lifter valley, along with several other things.
I ♥ Acer
Joined: Oct 2004
Posts: 17,565
From:
RE: Engine knock, already?!
ORIGINAL: Smothers
So he checked the valve train and found nothing wrong. He wants me to drain the oil and look for shavings. Says thats the next step and we will go from there. Real nice guy, even closed up his shop to help me shuttle the stang back to my house.
The knocking seems to be coming from the back of the engine area, almost like its in the bellhousing. But it sure sounds like a engine kind of knock to me. He isn't disagreeing.
Also, he said he checked some sources that indicated the old 289s and 302s may need to have the main bearings replaced with a different size main bearing (talking thousandth of an inch different or something like that) to eliminate unwanted noise, or something along those lines.
So he checked the valve train and found nothing wrong. He wants me to drain the oil and look for shavings. Says thats the next step and we will go from there. Real nice guy, even closed up his shop to help me shuttle the stang back to my house.
The knocking seems to be coming from the back of the engine area, almost like its in the bellhousing. But it sure sounds like a engine kind of knock to me. He isn't disagreeing.
Also, he said he checked some sources that indicated the old 289s and 302s may need to have the main bearings replaced with a different size main bearing (talking thousandth of an inch different or something like that) to eliminate unwanted noise, or something along those lines.
5th Gear Member
Joined: Aug 2004
Posts: 2,593
From: ABQ, NM, USA
RE: Engine knock, already?!
ORIGINAL: Smothers
Had my 289 rebuilt by a reputable engine builder about 1,500 miles ago and I am just now noticing a bit of a knock. It seems to happen after I have been driving for some time and the engine is all warmed up. I don't believe heat is the culprit as I have a new rad, aluminum H20 pump and the temp guage stays way to the left. I checked the oil and found I was almost 1 quart low since my first oil change ( changed at 300 miles ). Was told to expect oil usage untill it was done gettng broke-in.
If it is knocking, what needs to be done? (I am guessing it will have to come out be taken apart, but if so, what all would need attention?)
I will visit the rebuilder on Monday, but would like to know what you guys think.
-Josh
Had my 289 rebuilt by a reputable engine builder about 1,500 miles ago and I am just now noticing a bit of a knock. It seems to happen after I have been driving for some time and the engine is all warmed up. I don't believe heat is the culprit as I have a new rad, aluminum H20 pump and the temp guage stays way to the left. I checked the oil and found I was almost 1 quart low since my first oil change ( changed at 300 miles ). Was told to expect oil usage untill it was done gettng broke-in.
If it is knocking, what needs to be done? (I am guessing it will have to come out be taken apart, but if so, what all would need attention?)
I will visit the rebuilder on Monday, but would like to know what you guys think.
-Josh
Thread Starter
3rd Gear Member
Joined: Dec 2005
Posts: 755
From: North Idaho
RE: Engine knock, already?!
Well, he said it is the main bearings, not the rod bearings that may need to be changed to a different size (according to his sources).
I agree with the "trouble waiting to happen". The knock is getting more pronounced all the time. It will stay in my garage or at his shop untill this is resolved.
I agree with the "trouble waiting to happen". The knock is getting more pronounced all the time. It will stay in my garage or at his shop untill this is resolved.
ORIGINAL: Soaring
Then, if he is a reputable builder and the nice guy you say he is, he will tear it back down and replace the bearings with ones that he read about. It doesn't make sense to me though. If he put the rod bearings in that matched up with the crank and rods, you should not get any noise from them. If there is noise, then there is trouble waiting to happen.
ORIGINAL: Smothers
So he checked the valve train and found nothing wrong. He wants me to drain the oil and look for shavings. Says thats the next step and we will go from there. Real nice guy, even closed up his shop to help me shuttle the stang back to my house.
The knocking seems to be coming from the back of the engine area, almost like its in the bellhousing. But it sure sounds like a engine kind of knock to me. He isn't disagreeing.
Also, he said he checked some sources that indicated the old 289s and 302s may need to have the main bearings replaced with a different size main bearing (talking thousandth of an inch different or something like that) to eliminate unwanted noise, or something along those lines.
So he checked the valve train and found nothing wrong. He wants me to drain the oil and look for shavings. Says thats the next step and we will go from there. Real nice guy, even closed up his shop to help me shuttle the stang back to my house.
The knocking seems to be coming from the back of the engine area, almost like its in the bellhousing. But it sure sounds like a engine kind of knock to me. He isn't disagreeing.
Also, he said he checked some sources that indicated the old 289s and 302s may need to have the main bearings replaced with a different size main bearing (talking thousandth of an inch different or something like that) to eliminate unwanted noise, or something along those lines.
Thread Starter
3rd Gear Member
Joined: Dec 2005
Posts: 755
From: North Idaho
RE: Engine knock, already?!
No flex plate to crack as its a toploader tranny. As for leaky headers, sure doesn't sound like that kind of noise, plus I have tightened them as much as possible.
The engine is a 289 block w/ 302 crank & rods. 289 heads w/ solid lifters & larger cam (stage 2 cam is what the builder calls it), Comp roller tip rockers, performance valve springs Late 5.0 mustang pistons and valves. Hardened valve seats, 3 angle cut. Basically every part is new besides block, heads, intake manifold, rods, carb and starter. Its been deck plated and balanced.
Not sure what else I could mention that might be relevant.
The engine is a 289 block w/ 302 crank & rods. 289 heads w/ solid lifters & larger cam (stage 2 cam is what the builder calls it), Comp roller tip rockers, performance valve springs Late 5.0 mustang pistons and valves. Hardened valve seats, 3 angle cut. Basically every part is new besides block, heads, intake manifold, rods, carb and starter. Its been deck plated and balanced.
Not sure what else I could mention that might be relevant.
ORIGINAL: 69mach1377
Cracked flexplate or header exhaust leak? Don't really know much about your car...
ORIGINAL: Smothers
Had my 289 rebuilt by a reputable engine builder about 1,500 miles ago and I am just now noticing a bit of a knock. It seems to happen after I have been driving for some time and the engine is all warmed up. I don't believe heat is the culprit as I have a new rad, aluminum H20 pump and the temp guage stays way to the left. I checked the oil and found I was almost 1 quart low since my first oil change ( changed at 300 miles ). Was told to expect oil usage untill it was done gettng broke-in.
If it is knocking, what needs to be done? (I am guessing it will have to come out be taken apart, but if so, what all would need attention?)
I will visit the rebuilder on Monday, but would like to know what you guys think.
-Josh
Had my 289 rebuilt by a reputable engine builder about 1,500 miles ago and I am just now noticing a bit of a knock. It seems to happen after I have been driving for some time and the engine is all warmed up. I don't believe heat is the culprit as I have a new rad, aluminum H20 pump and the temp guage stays way to the left. I checked the oil and found I was almost 1 quart low since my first oil change ( changed at 300 miles ). Was told to expect oil usage untill it was done gettng broke-in.
If it is knocking, what needs to be done? (I am guessing it will have to come out be taken apart, but if so, what all would need attention?)
I will visit the rebuilder on Monday, but would like to know what you guys think.
-Josh
I ♥ Acer
Joined: Oct 2004
Posts: 17,565
From:
RE: Engine knock, already?!
ORIGINAL: Smothers
Well, he said it is the main bearings, not the rod bearings that may need to be changed to a different size (according to his sources).
I agree with the "trouble waiting to happen". The knock is getting more pronounced all the time. It will stay in my garage or at his shop untill this is resolved.
Well, he said it is the main bearings, not the rod bearings that may need to be changed to a different size (according to his sources).
I agree with the "trouble waiting to happen". The knock is getting more pronounced all the time. It will stay in my garage or at his shop untill this is resolved.
ORIGINAL: Soaring
Then, if he is a reputable builder and the nice guy you say he is, he will tear it back down and replace the bearings with ones that he read about. It doesn't make sense to me though. If he put the rod bearings in that matched up with the crank and rods, you should not get any noise from them. If there is noise, then there is trouble waiting to happen.
ORIGINAL: Smothers
So he checked the valve train and found nothing wrong. He wants me to drain the oil and look for shavings. Says thats the next step and we will go from there. Real nice guy, even closed up his shop to help me shuttle the stang back to my house.
The knocking seems to be coming from the back of the engine area, almost like its in the bellhousing. But it sure sounds like a engine kind of knock to me. He isn't disagreeing.
Also, he said he checked some sources that indicated the old 289s and 302s may need to have the main bearings replaced with a different size main bearing (talking thousandth of an inch different or something like that) to eliminate unwanted noise, or something along those lines.
So he checked the valve train and found nothing wrong. He wants me to drain the oil and look for shavings. Says thats the next step and we will go from there. Real nice guy, even closed up his shop to help me shuttle the stang back to my house.
The knocking seems to be coming from the back of the engine area, almost like its in the bellhousing. But it sure sounds like a engine kind of knock to me. He isn't disagreeing.
Also, he said he checked some sources that indicated the old 289s and 302s may need to have the main bearings replaced with a different size main bearing (talking thousandth of an inch different or something like that) to eliminate unwanted noise, or something along those lines.
Thread Starter
3rd Gear Member
Joined: Dec 2005
Posts: 755
From: North Idaho
RE: Engine knock, already?!
ORIGINAL: Soaring
Yeah, the rear main bearing will cause that knocking sound if it is bad or not fitted properly. It will also leak oil.
ORIGINAL: Smothers
Well, he said it is the main bearings, not the rod bearings that may need to be changed to a different size (according to his sources).
I agree with the "trouble waiting to happen". The knock is getting more pronounced all the time. It will stay in my garage or at his shop untill this is resolved.
Well, he said it is the main bearings, not the rod bearings that may need to be changed to a different size (according to his sources).
I agree with the "trouble waiting to happen". The knock is getting more pronounced all the time. It will stay in my garage or at his shop untill this is resolved.
ORIGINAL: Soaring
Then, if he is a reputable builder and the nice guy you say he is, he will tear it back down and replace the bearings with ones that he read about. It doesn't make sense to me though. If he put the rod bearings in that matched up with the crank and rods, you should not get any noise from them. If there is noise, then there is trouble waiting to happen.
ORIGINAL: Smothers
So he checked the valve train and found nothing wrong. He wants me to drain the oil and look for shavings. Says thats the next step and we will go from there. Real nice guy, even closed up his shop to help me shuttle the stang back to my house.
The knocking seems to be coming from the back of the engine area, almost like its in the bellhousing. But it sure sounds like a engine kind of knock to me. He isn't disagreeing.
Also, he said he checked some sources that indicated the old 289s and 302s may need to have the main bearings replaced with a different size main bearing (talking thousandth of an inch different or something like that) to eliminate unwanted noise, or something along those lines.
So he checked the valve train and found nothing wrong. He wants me to drain the oil and look for shavings. Says thats the next step and we will go from there. Real nice guy, even closed up his shop to help me shuttle the stang back to my house.
The knocking seems to be coming from the back of the engine area, almost like its in the bellhousing. But it sure sounds like a engine kind of knock to me. He isn't disagreeing.
Also, he said he checked some sources that indicated the old 289s and 302s may need to have the main bearings replaced with a different size main bearing (talking thousandth of an inch different or something like that) to eliminate unwanted noise, or something along those lines.
4th Gear Member
Joined: Mar 2006
Posts: 1,261
From: Concord, NC
RE: Engine knock, already?!
This is why every engine we build goes on the dyno before it is shipped to the customers. There are alot of things we find when they do hit the dyno( leaks, bad cams, and alot of other things) but everything if corrected before they go any further.