something wrong

[Kagan]

Hi,

I just saw that my 84 911 3.2 is not working properly. Can you check the below video and comment on it?

84 Porsche 911 engine - YouTube

What shoul I check?

thanks.

Kagan

[Rot 911]

Sounds like cam chain hitting the housing. Either bad cam chain tensioner or a chain ramp busted up. Either way, no more running the engine until you get it fixed!

[Kagan]

hmm my mechanic recently fixed that problem. Why would it happen again?

[Tippy]

Haven't watched the vid but the cam sprockets have to go on a specific way depending on which side. One side is flat and the other is cupped.

[motorcop]

oooh...that sounds ugly. I wouldn't run it any longer without having it checked. Hopefully not a major repair. What kind of air filter intake is that?

[tharbert]

Originally Posted by Kagan

hmm my mechanic recently fixed that problem. Why would it happen again?

Did your mechanic replace the tensioners and ramps? There are threads here about hydraulic tensioners failing.

In any event, with the constant sound of the chain on the housing like that, you shouldn't run it again. It doesn't sound as if you're getting any tension on the chain. Consider towing to the mechanic. I wouldn't drive it.

[ivangene]

if your mechanic worked on it recently - that is where the car should be towed to right away

stop running it, stop guessing what's wrong......

just saying

[Kagan]

thank you very much for the responses. In the movie it cannot be heard easily but let me explain how it goes. During idle the noise is not so much. When you push the gas a little bit upto 2-2.5 RPM and let it go back to idle, the chain noise is so obvious.

But when you drive the car (I found out this noise while driving on Sunday and did not even start the car till then), I mean during stable RPMs, the noise is not there and everything sounds normal.

The only noise can be heard during when the engine goes down to idle.

As far as I read through the forums, this means that the tensioners are not totally collapse but they will soon.

Now, I know you dont know whether both of the tensioners are bad ot not but still, should I replace both of them or the one that is faulty?

Is there a way to save them at this point? Is replacing the only way out?

By the way, I dont know if he changed them or not. He told me that he fixed it. I will ask him though.

Kagan

[Kagan]

the air filter is a silly aftermarket one, I know . I am trying to go back to original but it is impossible to find the original one in Turkey. It is quite hard to find parts here, so it takes lots of my time to buy the items from US and ship them to here...

[ant7]

Originally Posted by Kagan

the air filter is a silly aftermarket one, I know . I am trying to go back to original but it is impossible to find the original one in Turkey. It is quite hard to find parts here, so it takes lots of my time to buy the items from US and ship them to here...

hi,
If its the tensioners, then it could just be that there is an oil blockage stopping the tensioner filling up and taking up the slack in the chains.
Also, i know this might sound a bit daft, but are you sure its coming from the chain housings, and not the fan area, i ask this as there is a small chance that its the fan/altenator bearings that have failed and the fan is rubbing on the housing.
Its difficult to hear the sound properly.
Either way i wouldnt run it anymore untill you get it checked out, if you dont have any confidence in the mechanic who " repaired" it the first time, then i would ask for sugestions on here if there is anyone in your area that can be recomended.
Good luck with it.
Anthony.

[Kagan]

hmm I would try to record a better quality video when the mechanic checks the car. I will also check for any damage on the fan and around. I cannot be sure about that one. But I dont know which one is worse .

Is it easy to check these on my own? Or would I definitely need the mechanic around? Because I do not want to start the car based on your evaluations.

[gamin]

The symptoms that you describe in post #8 sound just like my 88 had. It was a failed tensioner.
I replaced both. It can be done with engine in car with some difficulty.