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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHThird Radiator
Leading reported evidence
Install stock
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
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1
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Performed · outcome unconfirmed
I have an 01 c2 cab w/tip and third radiator came installed stock.
Leading evidence: 'Install stock' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install stock' (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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Performed · outcome unconfirmed
I simply used 2 toggle switches that I installed in the batwing,
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Suggestion
When you turn the key off, the fans will continue to run for about 5 seconds until the relay shuts down.
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Suggestion
You can choose any style switch you want and even use Porsche switches (relay may be required).
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8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Outcome without a verified action link
I did something like this on that old Fiat I had because the relays didn't work like I wanted them to...
So, what is the consensus of the forum elders on a third radiator? I just got back from a quick trip to L.A. and ran into a little stop-and-go (precisely the reason I have tip) and was wondering about overheating. I kept looking at the temp gauge and it looked fine - but it's not that hot yet here (not that it gets THAT hot here anyway) but...
Do 996s have a history of overheating (like the 993 - yeah, yeah - I know they're air-cooled, but I've heard that mid-, rear engine cars sometimes have trouble...)? Would I have any trouble in the summer, mid-day desert, as I might encounter on a spontaneous run to Las Vegas (from San Diego)? I was hanging out at the dealer waiting for my second key to get programmed and they had a shiny new third radiator in their showcase - which made me wonder... Also, is installation a DIY (I'm not that sophisticated a mechanic, my crowning achievement in this area was I rebuilt the engine in my old '73 Fiat Spyder as part of my rite of passing several of several years ago) or is it an indy/dealer install?
Thanks,
Rudy
from 1999porsche911
******************
The 3.4 996 runs extremely hot when driving around town in temperatures higher than 75 degrees. This mod is a way to reduce coolant temps back to a safer level, helping to reduce oil temps and improving performance.
The mod consists of installing a switch that will allow you to turn on the high speed radiator fans at any time, while maintaining the automatic operation of the fans. We do the same for the engine compartment fan.
Radiator Fans
Connect a wire to the ground (Pin #85) of the 2 high speed fan relays located on the relay carrier located in the driver�s side foot well. The relays are #20 and #22. Feed this wire to where your switch will be located. Connect the wire to one side of the switch. Connect another wire from the other contact on the switch and then connect the other end of this wire to a chassis ground point.
With key on, this switch will now immediately turn on both radiator fans providing maximum cooling. When you turn the key off, the fans will continue to run for about 5 seconds until the relay shuts down. Your fan operation remains normal when the switch is off.
Engine Compartment Fan
Connect a wire to the ground of the relay located in the relay carrier behind the passenger seat, driver�s side. Relay #8. . Feed this wire to where your switch will be located. I simply fed the wire along the driver�s side of the car and under the door sill. Connect the wire to one side of the switch. Connect another wire from the other contact on the switch and connect the other end of this wire to a chassis ground point.
With key on, this switch will now immediately turn on the fan drawing air into the engine compartment. When you turn the key off, the fan will continue to run for about 5 seconds until the relay shuts down. Your fan operation remains normal when the switch is off. This mod helps keep the engine compartment much cooler when driving around town and is particularly beneficial to any engine that draws its intake air from inside the engine compartment, such as the EVO SC.
If you are adventurous, you can automate the operation of these switches so they will switch off at a specific speed, or operate when vacuum is present only, etc. You can choose any style switch you want and even use Porsche switches (relay may be required). I simply used 2 toggle switches that I installed in the batwing,
Jim
Wow - I like it! I did something like this on that old Fiat I had because the relays didn't work like I wanted them to... sounds like the same idea. I'm having a hard time trying to imagine what the relays look like - do you have pictures or can you direct me to a DIY with pictures?
Thanks!
Rudy
This is a source reference. Confirm exact model applicability in the original material.
