The sensor is the Camshaft position sensor.


Re: using RTV, I don't and never have.


Re: removing the old gasket, get some spray-on gasket remover from AutoZone, Napa, etc. This works CRC 05021 or the Permatex.

 

Here is the ultimate gasket remover tool.


The only issue you may have using this product on a rover water pump is having room using your standard drill. I use these on a 90* air grinder, and they are the bomb. Been using them for years...

 

Finally got it off. Used this thing, which is a glorified paint scraper. Will definitely get some of that remover stuff for next time.



So that's where the camshaft position sensor is...

All put back together. Had a slight issue bleeding, which is a first for me. Thought it was all good, temp spiked to 210. Shut down, played with a few things, put heater on etc. drops and stayed dropped. Coolant level also dropped, so I think I 'burped' it.

Didn't use RTV. Both surfaces were super clean. Gasket seemed quite thick and would easily compress to sort any issues.

Bolts toghtened to nnngffh + a little bit, f/lb.

Interesting note. Most water pump bolts are 10mm head. Three of them were an odd size that I could only get a 7/16 on. The longer ones that were obviously doing most of the work.

 

Some are 10mm and a few are 12mm bolts. If I remember correctly, the 12mm bolts are threaded into the water jackets. Did you use a thread sealer of some sort?

 

Oh bummer. I did not.

Yes, three of them were longer, and coolant ran out of one of the holes.

And, two of the bolts had some kind of goo on them when removed. The third was dry. I assumed it was someone a bit slap happy with the RTV.

The longer ones also made the awkward job of lining things up easier, and I wondered if that was the reason for the difference in length.

Why would some bolts be going into water jacket?

Do we reckon coolant could get past them, without sealant? <--- dim question.

Guess I keep an eye on things. I didn't clean off the bolts at all, so it might be that the old goo is enough. That's wishful thinking, that is.

 

Just keep an eye on it, your probably just fine though. In the future use rtv or thread sealant on any thread that touches water.

 

Yeah, makes perfect sense, just didn't cross my mind.

I can get a good eyeball on all the bolt heads in question. Just been for a good 10 mile drive, nothing so far.

Need a fingers crossed icon.