fullymatted.
Back to search
Rennlist

996.2 - Coolant temp. How cold is too cold

Add to repair workspace
Open repair workspace
Original source
8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH996.2 - Coolant temp. How cold is too cold

Leading reported evidence

Install water pump (porsche part) and aftermarket thermostat housing

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

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 · Original poster

Recently installed new water pump (Porsche part) and aftermarket thermostat housing with a 71 degree thermostat from

996.2 - Coolant temp. How cold is too cold
Read full discussion summary

Leading evidence: 'Install water pump (porsche part) and aftermarket thermostat housing' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install water pump (porsche part) and aftermarket thermostat housing' (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.

Read captured replies

1 matching discussions · 8 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Run hotter, not so easy

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

It is very easy to make the engine run hotter, not so easy to keep it cooler in every circumstance...

996.2 - Coolant temp. How cold is too cold

Run slower speeds at higher revs and more throttle/power

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

No matter what thermostat you put in you will not be able to keep the temps at 160F with the stock cooling system if you are running slower speeds at higher revs and more throttle/power ........

996.2 - Coolant temp. How cold is too cold

Run temps of road cars is

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

Marine engines run at full throttle all day long at 160F, it is not a problem and is still hot enough to burn off moisture condensation...The hotter running temps of road cars is for fuel mileage and emissions ONLY, don't let anyone tell you differently..

996.2 - Coolant temp. How cold is too cold
Frequently discussed actions (4)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Install water pump (porsche part) and aftermarket thermostat housing

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 · Original poster

Recently installed new water pump (Porsche part) and aftermarket thermostat housing with a 71 degree thermostat from

996.2 - Coolant temp. How cold is too cold

Run hotter, not so easy

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

It is very easy to make the engine run hotter, not so easy to keep it cooler in every circumstance...

996.2 - Coolant temp. How cold is too cold

Run slower speeds at higher revs and more throttle/power

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

No matter what thermostat you put in you will not be able to keep the temps at 160F with the stock cooling system if you are running slower speeds at higher revs and more throttle/power ........

996.2 - Coolant temp. How cold is too cold

Run temps of road cars is

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

Marine engines run at full throttle all day long at 160F, it is not a problem and is still hot enough to burn off moisture condensation...The hotter running temps of road cars is for fuel mileage and emissions ONLY, don't let anyone tell you differently..

996.2 - Coolant temp. How cold is too cold
Coverage and how to read this overview

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.

8 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: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi Team 996, I've got a 2004 996.2 manual C2. Recently installed new water pump (Porsche part) and aftermarket thermostat housing with a 71 degree thermostat from This past weekend I drove 600km (370mi) in varying ambient temperatures ranging from 24C to 36C (78F to 96F) Most of this was freeway sixth gear at around 3000rpm / 100-110kph (62-70mph). The A/C was on auto 22.5 the whole trip. I noted the following behaviours. The notes below are taken after 90 minutes of driving. so everything should have been warm, Water temp barely crossed 80 line (180 for US cars) When off throttle down an extended hill the gauge was below 80. Probably 75? Whilst all of this was occurring oil pressure was 4 bar at 3000rpm (which too me would indicate the engine oil was cool) and not 3 bar During the trip there was some short canyon caving style roads the water temp did increase to over 80 (the needle was vertical) and the oil pressure would be were I'd expect it to be for a hot engine. What I did see was the oil pressure pinned to 5 bar for the first few minutes before it seemed to come back as the engine was worked and everything got hot. So I wonder if this is all ok and carry on or get a replacement thermostat?

POST 3Original post

Not too cold. You have a good cooling system. Don't do anything. Mine is at 180 at highway speeds. It can get hot in stop-n-go but I never see it outside of the '0' in the 180 marker. Maybe 185?

POST 4Original post

You put in a 71�C (160�F) thermostat. The coolant temps you are getting are correct for the thermostat you have. It seems fine to me.

POST 5Original post

Normal. But if you want the temps to rise, all you gotta do is take it down a gear and get the revs up. The M96 likes to be pushed with higher rpms.

POST 6Original post

Marine engines run at full throttle all day long at 160F, it is not a problem and is still hot enough to burn off moisture condensation...The hotter running temps of road cars is for fuel mileage and emissions ONLY, don't let anyone tell you differently.. No matter what thermostat you put in you will not be able to keep the temps at 160F with the stock cooling system if you are running slower speeds at higher revs and more throttle/power ........ It is very easy to make the engine run hotter, not so easy to keep it cooler in every circumstance...

POST 7 / ORIGINAL POSTEROriginal post

@Porschetech3 This was the temp after 2 hours of freeway driving. Just after this photo I had a little play what I noticed was the oil pressure was 5 bar at 3500/4000 rpm rather than the 3-4 bar prior. In my mind I would think that the engine isn't warm enough for the load? Thank you for your thoughts on this.

POST 8Original post

It looks like your temp gauge is dead on 80C which is 176F ...plenty hot .....I consider anything below 160F as not fully warmed up...I would LOVE for all my engines to remain at 160F at all times .... but is just not practical , have to warm them up from cold...., then would require a very large cooling system to keep from going over 160F in Bama Summers during hard driving...

This is a source reference. Confirm exact model applicability in the original material.