Uggh.. timing chain rattle?

EPiK
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Re: Uggh.. timing chain rattle?

Post by EPiK » Mon May 14, 2018 11:52 pm

sweet victory wrote:
Mon May 14, 2018 4:50 pm
If it's the timing chain tensioner/pad, you should be able to measure the cam shaft deviation using a durametric.
explain please..

On the way to work tonight, no odd noises. Although it is difficult to discern the car from the 100s and soon to be 1000s of Harleys in town right now that are out on the road.

Still waiting for cold start when leaving here in 4 hrs.
1999 Carrera 2, factory ordered LSD, GT3 wannabe and daily driver
1988 944 NA/AT to MT/Turbo project.. future Outlaw
2003 G35 coupe 6mt GT35RS.. other daily driver
2013 Durango R/T package with a 6er

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sweet victory
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Re: Uggh.. timing chain rattle?

Post by sweet victory » Tue May 15, 2018 12:01 pm

EPiK wrote:
Mon May 14, 2018 11:52 pm
sweet victory wrote:
Mon May 14, 2018 4:50 pm
If it's the timing chain tensioner/pad, you should be able to measure the cam shaft deviation using a durametric.
explain please..

On the way to work tonight, no odd noises. Although it is difficult to discern the car from the 100s and soon to be 1000s of Harleys in town right now that are out on the road.

Still waiting for cold start when leaving here in 4 hrs.
In a nutshell, take your car on a 20min+ drive and use the durametric tool to measure each cam shaft position while idling. Porsche allows +/- 6 degrees of cam shaft deviation. (from 0) If your values are near +/- 6, then this would support the theory that the chain pads have worn to the end of their life.
2001 996 C2 Aero

EPiK
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Re: Uggh.. timing chain rattle?

Post by EPiK » Wed May 16, 2018 1:02 am

I'll have to look up the Durametric tool and maybe ask around the local PCA guys too.

I did climb under the car today to take another look and I took some pics of the external chain tensioners that are visible. Does anyone notice an issue? Seems something is off.. or at least not what it should be as described in the "101 Projects" book.
20180515_184821.jpg
20180515_185004.jpg
The book states that the circles embossed on the block and heads are to match the tensioners.. mine are not matched up. Its my guess that the 2 that are swapped were put back in when the IMS bearing was done and from the pics in the book, those 2 look almost identical, so it shouldn't be an issue... whereas the 3rd tensioner you cant see without removing the AC compressor is a different length.

The oil seep I'm seeing on the drivers side I think is actually coming from the camshaft plugs on the end of the head. When I do the engine out service I'll take care of all that.

I placed a big order with Pelican this morning and for $10.00 got the 2 day shipping..so I'll have it all Friday
1999 Carrera 2, factory ordered LSD, GT3 wannabe and daily driver
1988 944 NA/AT to MT/Turbo project.. future Outlaw
2003 G35 coupe 6mt GT35RS.. other daily driver
2013 Durango R/T package with a 6er

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sweet victory
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Re: Uggh.. timing chain rattle?

Post by sweet victory » Wed May 16, 2018 7:58 am

EPiK wrote:
Wed May 16, 2018 1:02 am
I'll have to look up the Durametric tool and maybe ask around the local PCA guys too.

I did climb under the car today to take another look and I took some pics of the external chain tensioners that are visible. Does anyone notice an issue? Seems something is off.. or at least not what it should be as described in the "101 Projects" book.
20180515_184821.jpg20180515_185004.jpg

The book states that the circles embossed on the block and heads are to match the tensioners.. mine are not matched up. Its my guess that the 2 that are swapped were put back in when the IMS bearing was done and from the pics in the book, those 2 look almost identical, so it shouldn't be an issue... whereas the 3rd tensioner you cant see without removing the AC compressor is a different length.

The oil seep I'm seeing on the drivers side I think is actually coming from the camshaft plugs on the end of the head. When I do the engine out service I'll take care of all that.

I placed a big order with Pelican this morning and for $10.00 got the 2 day shipping..so I'll have it all Friday
Seeing as you're not the average DIYer, I would recommend investing in the enthusiast kit. This has far more use than a code reader could ever provide.

http://www.durametric.com/
2001 996 C2 Aero

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5chn3ll
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Re: Uggh.. timing chain rattle?

Post by 5chn3ll » Wed May 16, 2018 9:05 am

Where are you located? Several of us have Durametrics; I don't anticipate needing the other two VINs for mine.

If you don't want to buy one and don't mind waiting a few days, I'm also happy to ship mine to you...

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DBJoe996
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Re: Uggh.. timing chain rattle?

Post by DBJoe996 » Wed May 16, 2018 10:20 am

Chain tensioners
Chain Tensioners.JPG

EPiK
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Re: Uggh.. timing chain rattle?

Post by EPiK » Wed May 16, 2018 3:30 pm

yup DBJoe that's exactly what I was referring to.

Seems that this very high end indy shop in TX reinstalled the tensioners in the wrong holes? Maybe they are identical, just marked differently? That was 15k miles ago, and it runs fine other than the startup noise, which is a lot less since the Lubri-Moly I put in the oil.

I'll know for sure tomorrow on the sizes when I get the 3 new ones.
1999 Carrera 2, factory ordered LSD, GT3 wannabe and daily driver
1988 944 NA/AT to MT/Turbo project.. future Outlaw
2003 G35 coupe 6mt GT35RS.. other daily driver
2013 Durango R/T package with a 6er

EPiK
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Joined: Tue Mar 27, 2018 1:28 am
Location: Myrtle Beach SC

Re: Uggh.. timing chain rattle?

Post by EPiK » Fri May 18, 2018 1:24 am

Thursday afternoon when I woke up there was a very expensive box from Pelican on the counter. Unfortunately I picked up an extra night to help a guy out soooo.... after working 55 hrs this week by the time I get off in 2 more hrs.. I'll be digging in to the 996.

Oil and filter change
4 new oxygen sensors
all 3 new external tensioners
cylinder compression test (just for the logbook)

still not sure what to make of the tensioners in the engine now being in the wrong holes :shock:
1999 Carrera 2, factory ordered LSD, GT3 wannabe and daily driver
1988 944 NA/AT to MT/Turbo project.. future Outlaw
2003 G35 coupe 6mt GT35RS.. other daily driver
2013 Durango R/T package with a 6er

EPiK
Posts: 52
Joined: Tue Mar 27, 2018 1:28 am
Location: Myrtle Beach SC

Re: Uggh.. timing chain rattle?

Post by EPiK » Fri May 18, 2018 1:26 am

BTW.. caffeine is a wonderful drug :lol:
1999 Carrera 2, factory ordered LSD, GT3 wannabe and daily driver
1988 944 NA/AT to MT/Turbo project.. future Outlaw
2003 G35 coupe 6mt GT35RS.. other daily driver
2013 Durango R/T package with a 6er

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Dr_Strangelove
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Re: Uggh.. timing chain rattle?

Post by Dr_Strangelove » Fri May 18, 2018 10:29 am

EPiK wrote:
Fri May 18, 2018 1:24 am
still not sure what to make of the tensioners in the engine now being in the wrong holes :shock:
The good news is they're all the same diameter, just not the same length or tension. It looks like you lucked out and got the two that are the same length but most likely not the same pressure on the tensioner paddle which is causing your rattle issue. Check your oil sump for pad material during your oil change, and fingers crossed you caught this before extensive damage to the soft bits.
2003 Carrera: Dark Teal Metallic

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