Head Noise! Help!

sleepin 4.6 · 07-03-2008, 11:28 PM

Okay well I got it torn down to where the pics are now. I do not see anything that could be broken or messed up. Everyone posted that it was the timing chain tensioner when I posted the vid last time. Here is the vid again so you can hear the noise. Maybe someone can give me an idea what to look at or replace?

VID:

'99 Cobra Motor - Video

PICS:

sleepin 4.6 · 07-04-2008, 02:43 AM

Quadcammer · 07-04-2008, 07:40 AM

I haven't looked at any in while, but is the plastic cracked on your secondary tensioner (cam to cam). doubt that would cause that noise, but who knows.

otherwise, everything looks ok.

sleepin 4.6 · 07-04-2008, 11:06 AM

Quote:

Originally Posted by Quadcammer

I haven't looked at any in while, but is the plastic cracked on your secondary tensioner (cam to cam). doubt that would cause that noise, but who knows.

otherwise, everything looks ok.

The pastic looks great. I am so lost on this one.

Quadcammer · 07-04-2008, 11:15 AM

have you pulled the filter to look for shavings? may be a bottom end noise with some sound travel

01 Venom · 07-05-2008, 09:48 AM

sound does tend to travel on these things. Might as well replace the tensioners while you got it all ripped apart

cobraracer46 · 07-05-2008, 11:21 AM

The offending engine noise sounds like a bad serpentine belt tensioner to me. Since you tore the engine covers off, I assume that you did not use a stesiscope to try and isolate the abnormal noise.

sleepin 4.6 · 07-05-2008, 07:28 PM

Quote:

Originally Posted by cobraracer46

The offending engine noise sounds like a bad serpentine belt tensioner to me. Since you tore the engine covers off, I assume that you did not use a stesiscope to try and isolate the abnormal noise.

That would be the opposite side wouldn't it?

matted2thefloor · 07-05-2008, 08:01 PM

Quote:

Originally Posted by cobraracer46

The offending engine noise sounds like a bad serpentine belt tensioner to me. Since you tore the engine covers off, I assume that you did not use a stesiscope to try and isolate the abnormal noise.

That's what I first thought too! After the video ran it's length, it def sounded like it was coming from the driver side. I also don't think it's coming from as deep into the motor as you have disassembled. It almost sounds like something rubbing....a pulley/bracket. Check all the pulleys for "witness" maks for rubbing front and back.

A good method I use for locating noises is a long slim screwdriver and just touch the tip to a part or area to see how magnified the noise seems. Keep probing around until it's real loud and that should give you an idea as to what is making the noise.

Keep us posted as to what you find.

qwik01cobra · 07-05-2008, 08:16 PM

If I had to put my finger on it I would say its the tensioners. They tend to make alot of racket when bad but anything is possible. Can you compress the tensioner by hand?

If your going to replace the tensioners use the 05+ GT 3 valve tensioners. There plastic and a better design. Also there alot quieter. I dont think anyone mentioned this but if they did I must have missed it.

sleepin 4.6 · 07-06-2008, 04:24 PM

Quote:

Originally Posted by qwik01cobra

If I had to put my finger on it I would say its the tensioners. They tend to make alot of racket when bad but anything is possible. Can you compress the tensioner by hand?

If your going to replace the tensioners use the 05+ GT 3 valve tensioners. There plastic and a better design. Also there alot quieter. I dont think anyone mentioned this but if they did I must have missed it.

I will have to try and compress it by hand. The car is out at my brothers so I will take a drive out there and check. I will post up in alittle.

sleepin 4.6 · 07-06-2008, 05:45 PM

Quote:

Originally Posted by qwik01cobra

If I had to put my finger on it I would say its the tensioners. They tend to make alot of racket when bad but anything is possible. Can you compress the tensioner by hand?

If your going to replace the tensioners use the 05+ GT 3 valve tensioners. There plastic and a better design. Also there alot quieter. I dont think anyone mentioned this but if they did I must have missed it.

I can't compress either by hand but the one on the drivers side seems to have alittle play in it. Could that cause anything?

qwik01cobra · 07-06-2008, 06:34 PM

Quote:

Originally Posted by sleepin 4.6

I can't compress either by hand but the one on the drivers side seems to have alittle play in it. Could that cause anything?

I would just put the 05' + GT 3 valve primary chain tensioners in

sleepin 4.6 · 07-07-2008, 05:32 PM

Quote:

Originally Posted by qwik01cobra

I would just put the 05' + GT 3 valve primary chain tensioners in

Its the same bolt up pattern and everything? Price wise are they about the same?

qwik01cobra · 07-08-2008, 03:18 PM

Quote:

Originally Posted by sleepin 4.6

Its the same bolt up pattern and everything? Price wise are they about the same?

They are the exact same, just platic housing. $38-42 a peice is what I pay for them.