Pelican Parts Forums

Pelican Parts Forums (http://forums.pelicanparts.com/)
-   Porsche 911 Technical Forum (http://forums.pelicanparts.com/porsche-911-technical-forum/)
-   -   Rattling engine noise out of a 3.2 (http://forums.pelicanparts.com/porsche-911-technical-forum/1018613-rattling-engine-noise-out-3-2-a.html)

kamaro 01-19-2019 10:41 PM

Rattling engine noise out of a 3.2
 
I've noticed a "rattle" noise in the driver side of the engine (a Carrera 3.2 out of a 1986), I used a stethoscope to pinpoint it and found that its coming from the driver's side chain housing. Not too loud but diffidently noticeable, very similar to the noise in this vid. :

https://www.youtube.com/watch?v=WezVgDurriE

Would that be a bad tensioner? how common for a Carrera tensioner to go bad? can I get away by just lowering the engine a bit to get access to get it replaced? I'm still driving the car around at this point, do I have to stop driving it until it got fixed?

I know I have a ton of questions but these engines got way expensive to get and to fix!

proporsche 01-20-2019 12:07 AM

well? drivers side on rhd 911 correct.To locate the noise of the chains you have to focus to the front of the engine not rear..make another video from the front and we could tell you ....
from this take i would say loose valve adjustment...

Ivan

GaryR 01-20-2019 01:47 AM

Is it an oil fed tensioner? I've had a few fail on me, relatively easy to replace.

kamaro 01-20-2019 03:28 AM

Quote:

Originally Posted by GaryR (Post 10323317)
Is it an oil fed tensioner? I've had a few fail on me, relatively easy to replace.

Yes they are oil-fed ones. Have you replaced them with the engine in the car?

GaryR 01-20-2019 03:31 AM

Quote:

Originally Posted by kamaro (Post 10323330)
Yes they are oil-fed ones. Have you replaced them with the engine in the car?

Yes, requires a partial engine drop IIRC, to give easy access to the chainbox covers. As soon as the cover is off you will see if it's the tensioner or not.

Duc Hunter 01-20-2019 04:42 AM

The tapping noise? Sounds like a valve to me...and pretty normal. Sometimes noises dont translate to YouTube well. When my tension went out is was a very obvious rattle on decelerations at about 2,100 RPM. At idle it was not there at all, and on accel it wasn’t really. On deceleration you could hear it VERY obviously. I did not hear this noise on your YouTube

RDM 01-20-2019 04:52 AM

No drop (partial or full) required for an SC. Just remove the rear engine tin. Not sure if a 3.2 is different.

proporsche 01-20-2019 06:13 AM

as i said and Chris ,your problem is not collapsed chain tensioner but valve adjustments....

Ivan

Bob Kontak 01-20-2019 01:40 PM

Quote:

Originally Posted by kamaro (Post 10323300)
I used a stethoscope to pinpoint it and found that its coming from the driver's side chain housing. Not too loud but diffidently noticeable

Chain tensioner noise will be profound at the chain cover. It will sound "so right there". It is unmistakable. You are just hearing noise transmission through the engine.

Duc and Ivan are steering you correctly.

On a side note, the tensioner is an easier repair than going through the valves.

Oneredspyder 01-20-2019 02:00 PM

Are you sure it is not the fan hitting the fan housing? It made a rattling noise on my 86 Carrara and had many cracks in the fan housing. The alternator may also need a new bearing that will cause the same noise from a loose fan. Any fan marks on the housing or broken fan blade tips?

Rodsrsr 01-21-2019 09:19 AM

I had stretched timing chains and worn chain ramps that made a horrible noise at start-up. Yours sounds more like valve adjustments, so I would definitely try that first.

proporsche 01-21-2019 11:24 AM

amen;-)


All times are GMT -8. The time now is 12:46 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website


DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.