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I returned from a drive and fluid started draining down from the top of the expansion tank. See photo 1.
See second photo: Part of the bleed screw was just shorn off. When I popped the hood, I heard something small fall down into the engine, but it did not make it all the way through to the ground. The expansion tank is full, and the gauge reads right in the middle.
Thanks to a recommendation on this list I ordered an alloy replacement bleed screw.
I found this from Rick on a six-year-old thread.
Start vehicle, heat on high allow time for pressure to build loosen purge screw (bleed screw) enough to allow bubbles and a bit of coolant out, close and repeat until no more bubbles.
My question to you is do I keep the car runnning and the heat on high throughout the repeat process? I am assuming so, but as I have not done this before I want to be sure. From your experience can you give an approximation of how many times one has to repeat the process?
And these two on another:
Start vehicle, heat on high allow time for pressure to build loosen purge screw (bleed screw) enough to allow bubbles and a bit of coolant out, close and repeat until no more bubbles.
Now drive one last time about 30 minutes with heater on high heat, high fans. Return and with the engine still running, gently open the bleed screw until liquid seeps, tighten screw just until the seeping stops, and you're done. After the car cools completely, check the level in the expansion tank and top off with Dexcool if needed.
The spot where the bleed screw goes was covered with electirican's tape for about a week while I waited on the part. I did not run the car.
Thanks for your consideration. I have a 2005 XJ8L.
Any help appreciated
FH
Last edited by Finzi Holst; Jan 24, 2021 at 09:48 AM.
1 The wreckage of the original bleed screw is still in the hole----you will have to remove it before fitting the new one.
2 I keep the engine running. If you fill slowly and squeeze the hoses while filling it does not take too long to get the remaining air out.
Thank you to TM1238, Paul_59, scottjh9; joycesjag, steve11 for your help with this issue.
I followed your instructions and all seems Hoyle, will check after cool down, and monitor throughout the week.
Here are photos of the part installed and the packaging in case anyone else needs one of these. I got it on ebay from Pritish Parts Utah for $19.99. I also ordered a plastic one for back up.
Thanks abonano, for this and your other message (below). Appreciated.
FH
Anytime FH - glad it all worked out. Just keep an eye on coolant level for about a week
You'll find it takes about that long to stabilize the coolant level.