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Discussion summary
YOUR RESEARCHBut, what if its the IMS chain guide?
Leading reported evidence
Use cam tensioner pads
Performed · outcome unconfirmed
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0
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1
Discussions
Read evidence and context
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Especially when you are comparing them to used cam tensioner pads.
Leading evidence: 'Use cam tensioner pads' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check ims chain guide' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
Can this tensioner be checked with the engine in the car?
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Suggestion
I ask because I am having my engine bore scoped next week, and I might be looking at a repair of the chain guides that drive the IMS and cams.
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16 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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01 996 C2 Manual
Oil pan revealed some brown plastic bits and some metal shavings so I set to tear down the engine in search of the culprit. I see some good wear and tear on the variocam guides but not as much on the left and right bank guides. That leaves 1 guide remaining. How can I check the IMS chain guide for wear? Is it also doodoo brown like the others or a different color?
Thanks in advance.
This is not always the case! I am currently doing chain guides on my 04 966.2 and both lower guides on each bank are brown. Both uppers and the IMS are black.
If you unscrew & remove the tensioner right behind where it's located you can see it. Might need a inspection scope to see better. The tensioner is specific to that location & be sure it is the new improved version with the preload spring.
Can this tensioner be checked with the engine in the car? I ask because I am having my engine bore scoped next week, and I might be looking at a repair of the chain guides that drive the IMS and cams. I�m having the bores scoped, not because I think I have bore scoring, but because I need to evaluate whether or not to rebuild the whole engine or just repair it.
When they age, they turn black just like the intermediate shaft one. The cam pads on the other hand are almost white when new and they turn brown when the get old.
Unless you have the intermediate shaft chain guide sitting next to it, they look black. Especially when you are comparing them to used cam tensioner pads. The debris that falls into the sump will have either really dark (black) pieces or lighter brown looking ones. It is very difficult to tell the difference between the intermediate shaft chain guide and the rails bits but it is pretty easy to tell if it's a cam tensioner pad debris or not.
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