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Forum: Diesel Discussion

01-04-2007, 06:04 PM

Replies: 30

Loud knocking and LOTS of Blow-By: 300SD

Views: 6,477

Posted By cousindave76

I have been having problems with my brakes. When...

I have been having problems with my brakes. When I press the brake pedal it feels fine at first but then, the pedal stiffens and I can not press it any further. It's kind of a one shot chance to...

Forum: Diesel Discussion

01-03-2007, 06:53 PM

Replies: 30

Loud knocking and LOTS of Blow-By: 300SD

Views: 6,477

Posted By cousindave76

Hopfully I'm all good then... I did not realize...

Hopfully I'm all good then... I did not realize that the blow-by test could possibly damage a seal but, already done. It feels good to know it's in normal range though. I have driven this car for a...

Forum: Diesel Discussion

01-03-2007, 06:34 PM

Replies: 30

Loud knocking and LOTS of Blow-By: 300SD

Views: 6,477

Posted By cousindave76

Diesel2theMoon, I did the test as per your...

Diesel2theMoon, I did the test as per your instruction. I capped the breather hole on the valve cover and started counting. It took about 25 seconds for the engine to die. When I let my thumb off the...

Forum: Diesel Discussion

01-03-2007, 06:29 PM

Replies: 30

Loud knocking and LOTS of Blow-By: 300SD

Views: 6,477

Posted By cousindave76

good point. In my excitment of finding the loud...

good point. In my excitment of finding the loud noise, I forgot all about the blow-by. I will do this test real quick and post the results.

Forum: Diesel Discussion

01-03-2007, 05:01 PM

Replies: 30

Loud knocking and LOTS of Blow-By: 300SD

Views: 6,477

Posted By cousindave76

Update! Update! Update!

I have found the problem!

One by one I started taking belts off and then starting it up to see if the knock was still there. I give you, the ALTERNATOR!

I had put a new alternator on the car...

Forum: Diesel Discussion

01-03-2007, 03:38 PM

Replies: 30

Loud knocking and LOTS of Blow-By: 300SD

Views: 6,477

Posted By cousindave76

On to it!

Well I have been looking it over today and have not made much progress. With it running I loosened off the fuel lines to each injector one at a time. The knocking sound never got quieter. The only...

Forum: Diesel Discussion

01-02-2007, 01:39 AM

Replies: 30

Loud knocking and LOTS of Blow-By: 300SD

Views: 6,477

Posted By cousindave76

My vacuum system has been working fine. I won't...

My vacuum system has been working fine. I won't rule out a faulty pump though. I will double check it for proper function.

I will try to isollate the cylinder number making the noise using the...

Forum: Diesel Discussion

01-01-2007, 10:53 PM

Replies: 30

Loud knocking and LOTS of Blow-By: 300SD

Views: 6,477

Posted By cousindave76

oh... and it has never even come close to...

oh... and it has never even come close to 5000rmp. I don't think I have ever let it go above 4000 rpm. You know how these diesel engines are... anything above 3500 makes it sound like it's going to...

Forum: Diesel Discussion

01-01-2007, 10:50 PM

Replies: 30

Loud knocking and LOTS of Blow-By: 300SD

Views: 6,477

Posted By cousindave76

Normal city driving. I am actaully a very...

Normal city driving. I am actaully a very conservative driver... with exception of an itialian tuneup every two months or so.

I do not recall laying into it today at any point. I did not notice...

Forum: Diesel Discussion

01-01-2007, 10:11 PM

Replies: 30

Loud knocking and LOTS of Blow-By: 300SD

Views: 6,477

Posted By cousindave76

I was driving as usual when I first noticed the...

I was driving as usual when I first noticed the sound. Oddly enough I have not noticed a loss of power. Still runs good!

Does that eliminate anything?

Forum: Diesel Discussion

01-01-2007, 09:38 PM

Replies: 30

Loud knocking and LOTS of Blow-By: 300SD

Views: 6,477

Posted By cousindave76

Loud knocking and LOTS of Blow-By: 300SD

I have an 83' 300sd 198k. My engine has always run very smooth with all the right sounds. I just starting hearing a very loud knocking sound. I would describe the sound as being a bad valve. Because...

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