21 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHThe Time Has Come...
Leading reported evidence
Replace two
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I replaced two on my 996 while I had the engine out.
Leading evidence: 'Replace two' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check idler pulleys' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I used the coolant drain plug to drain the engine coolant.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Be sure to check the idler pulleys for play and smoothness.
Replace ...by the way...original water pump and thermostat....99 996
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Guess what....after draining the system to change my leaking heater core...I went ahead and checked the water pump....not leaking..but noticeable play in the pulley and noisy bearings....I went ahead and removed the thermostat and water pump....waiting for the new ones to arrive to replace...by the way...Original water pump and thermostat....99 996
Replace ...by the way...original water pump and thermostat....99 996
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Guess what....after draining the system to change my leaking heater core...I went ahead and checked the water pump....not leaking..but noticeable play in the pulley and noisy bearings....I went ahead and removed the thermostat and water pump....waiting for the new ones to arrive to replace...by the way...Original water pump and thermostat....99 996
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Guess what....after draining the system to change my leaking heater core...I went ahead and checked the water pump....not leaking..but noticeable play in the pulley and noisy bearings....I went ahead and removed the thermostat and water pump....waiting for the new ones to arrive to replace...by the way...Original water pump and thermostat....99 996
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
21 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T154520Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
To change my water pump and thermostat!
No drips but I have developed some coolant crust on the outer edge of the pully and pump bolts...So much for a relaxing day off on Tuesday
Quick question, can I just drain the coolant from the motor or do I have to flush out the entire system? I have all new (two months old) coolant in there now.
Hi Bill,
Your coolant is new but.. you say it�s crusty?
I would try to capture and filter the coolant. This is a great way to quickly get all the coolant out.
https://rennlist.com/forums/996-foru...pump-tips.html
Thanks to a post by Asahi.
Guess what....after draining the system to change my leaking heater core...I went ahead and checked the water pump....not leaking..but noticeable play in the pulley and noisy bearings....I went ahead and removed the thermostat and water pump....waiting for the new ones to arrive to replace...by the way...Original water pump and thermostat....99 996
Feel like this is a project I want to tackle before winter or in spring. Dunno if mines been swapped, I am around 52k miles. Seems like a reasonably straight forward project.
I used the coolant drain plug to drain the engine coolant. Changed water pump and thermostat. Probably the hardest part was getting the big hose off the thermostat. Keep track of your water pump bolts, they are different lengths. I set the new water pump beside me and as I took out the water pump bolts I put them in the corresponding bolt hole on the new water pump. I refilled the coolant expansion tank, waited awhile to see if it would burp, then fired it up. Added coolant once it started to get warm and then put on the cap. Manually lifted the wire bail and took a drive. I left the wire bail up for several days for several drive cycles cool to hot to cool. Only had to add a minor bit of coolant and that was it.
There is a hard line (black pipe) that runs next to the thermostat cover. Look forward along the engine and there is a small 8mm bolt that holds the line in place. Removing that bolt so the hard line is movable is a trick to make removing/installing the thermostat way easier.
Be sure to check the idler pulleys for play and smoothness. I replaced two on my 996 while I had the engine out. Found dayco pulleys on eBay for about $33.00 @.
Look at this on eBay
Dayco Upper Drive Belt Idler Pulley for 1999-2008 Porsche 911 3.6L 3.4L 3.8L wy
Belt as well.
Thanks, I actually had the belt off last week to check everything (thus spotting the dried coolant one the water pump) else looked good. I feel the AC compressor may be next though. I get a slight vibration when the fans at 2 bar and above.
I too just got a UView but am yet to use it,I did a bunch of little jobs whilst I have the coolant drained - cap at the back of the engine + the T coolant piece that goes to the AOS.
I found a URO parts metal T piece that was half the price of the ratchet and spiegal? One and is identical to the original in design just all metal - awesome.
Good information. It is actually fairly simple to keep track of the bolts. The two longer ones go in the bolt holes with the alignment rings. Removing some of the bolts holding the hard pipes is good advice.
Did you receive an EGR instead of the water pump?
The EGR is a gas recirculation valve, frequently used in turbo diesel for recirculating part of the exhaust gases to the intake to reduce the temperature in the chamber and with that, the polution
They are a pain on the but actually...
