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radiator fan switch mod

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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHradiator fan switch mod

Leading reported evidence

Check fan relays, two were totally missing

Performed · outcome unconfirmed

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed · Original poster
Glad I did it- when I checked my fan relays, two were totally missing!!
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radiator fan switch mod

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Leading evidence: 'Check fan relays, two were totally missing' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check fan relays, two were totally missing' (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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Use cool climate control trick

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion · Original poster
(pun intended) It wasn't very hot here yesterday, maybe 65F when I took it out last night to test, but I managed to get the coolant temp up above 92C (used the cool climate control trick to read true coolant temp) .
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radiator fan switch mod

Frequently discussed actions (2)

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

Check fan relays, two were totally missing

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
Glad I did it- when I checked my fan relays, two were totally missing!!
Original post Read captured discussion
radiator fan switch mod

Use cool climate control trick

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 · Original poster
(pun intended) It wasn't very hot here yesterday, maybe 65F when I took it out last night to test, but I managed to get the coolant temp up above 92C (used the cool climate control trick to read true coolant temp) .
Original post Read captured discussion
radiator fan switch mod

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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.

2 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.

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Generation: 20261027T061840Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Just completed the "radiator fan switch mod" yesterday, and I have to say- it's too cool! (pun intended) It wasn't very hot here yesterday, maybe 65F when I took it out last night to test, but I managed to get the coolant temp up above 92C (used the cool climate control trick to read true coolant temp) . When I was driving in the city, stop and go, and coolant temp started to raise, just hit the switch and the temps started rocketing down- love it!!!! I'm hoping for warmer weather just to see how well it works. Glad I did it- when I checked my fan relays, two were totally missing!! My right fan would never be able to come on at it's high speed! From what I have researched, the M96 01 engine has it's thermostat open at 83C (181.4F), and the preferred operating temp is from 90-95C (194-203F). Does this sound correct? Looks like the rear engine fan comes on when coolant temp is over 102C (216F), (or when the engine compartment is over 176F) so over 102C would be considered a little too warm. I'm just trying to figure out the desired operating range. I want my engine to get hot enough to stay healthy, but not so much as to stress it much. Plus- anything to keep my $12K 66,000 mile original engine happy! This will be my first summer with the '99, and I sure feel more at ease now.

POST 2Original post

Quotes source post: 5408255

my fans work normally and my operating temp seems to be in the 194-203F range. but it hasn't gotten really above 78F yet, so i'll keep an eye on it during the summer.

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