Thread: Under bonnet seals - warning - do not remove

Hoges, that was disgraceful. ..

Too many dad jokes for you.

Thermo over ride and snorkel would keep me happy for now... although i did see a nice scoop on HighRR's LS1 equipped P38 a few weeks ago. So where is that Lucky 8 snorkel kit at now? I'm sure I preordered one off the prototype posting a month or so ago!!!

P.S. Hoges I guess you think fridges and Air Cons are cool too? :-)

Do we have schematics from anyone on how to fire up those thermo fans from the fuse box or becm? I'd rather not chop into the wires up front.

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It should be able to be done from the hevac ecu. That way it'd run through the relays etc.

This circuit refers to the 1999 P38.
Simple - Remove your bumper. Then locate the condenser pressure switches on the LH side of the vehicle. One is 2 wire and the other is 4 wire. The 4 wire one faces for and aft and is closest to the centre of the vehicle.

The 4 wire one has one wire which is Black with blue stripe.
To get both fans to run in parallel at high speed all you need to do is to allow an alternative earth path for this wire. Use a scotch lock to tap in and then an inline switch in the cabin to switch to earth.
See attachment.

If you have a TM2 then you can use it to switch the fans via relay - Post if you want that circuit as well.

Great info, thanks. Dumb question, what is a TM2? Is it a timer? If so please do provide wiring diagram!

Thanks

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Glen

I'm guessing Peter51 is referring to the Engine Watchdog TM2 (and TM4).

ENGINE WATCHDOG TM2, Engine Temperature Sensor and Low Coolant Alarm

Gary

Originally Posted by glenhendry

I made a silly mistake, and now I am paying for it...

Lesson: Do not remove any of the bonnet seals. I removed one of the two foam blocks at the rear corner of the bonnet where it contacts the firewall. I hoped that this would allow heat to escape when stopped, but I did not anticipate the drastic affect it would have on air flow while driving. It acted as a sort of chimney and hot air was channeled out the new hole instead of going under the car and caused the coolant reservoir to soften and then pop (under its 20psi pressure). Thankfully the missus pulled over and no major harm was done. The ABS reservoir also looked heat affected and a largish plastic duct that vents under the coolant overflow.

History: For a long while now I have been concerned about the under bonnet heat, especially relating to the fuse box getting baked for hours after the car is parked up, with the clam shell bonnet all sealed up like it is. Not only heat, but 'corrosive battery fumes' had also been mentioned in posts and I wanted a way to get the heat out once parked up. I considered a bonnet scoop but learned folks warned that they could have undesired consequences.

Question 1: can I use the ABS reservoir off an earlier model on my 2000MY HSE? I have one, and they look identical. I believe that it is off of a 1999MY.
Question 2: do you all see water flowing (visibly) into the coolant expansion tank from the smaller hose underneath the tank (towards the front)? I never noticed that before. It comes from the inlet manifold via the throttle body.

I removed the side seals and under windscreen seal 3 years ago without any bad effect. Very strange is your story...