Cam Position Sensor Oring leak

[Ollygt]

Hello all,
I replaced the CPS oring but when I was putting the sensor back I had to take off that little cap at the end of the cam so I could locate it, putting a little Curil-T on the bottom of the cap I did that back up tightly and tightened the CPS back into place. I ran the car for a bit then felt underneath and I think there's still a bit of oil leaking or it's residue from before. So I undid the CPS but it wouldn't move easily so I had to undo the cap again then make sure the cps was easy to rotate and then did the cap back up.

Is there a chance that I could've pinched the o-ring with the cap when doing it up initially thus damaging it?
I'm going to run it a bit more to see if it does actually leak oil.

On a side note, is it safe to leave the lower coil pack bolt out, it's the 13mm one that actually bolts into the head. It's a swine to get in and out to say the least.

[davamb]

Hi Olly,

can't help you much on the leak, other than to say make sure it's all thoroughly cleaned first to make sure you're not seeing any oil that might have come out during the replacement process. Sorry if I'm stating the obvious.

On to the coilpack bolt though, I just replaced my 'pack and found that there was no bolt! It has been missing at least from the last time the pack was removed, perhaps earlier. Hasn't done any harm. I didn't find it that hard to replace either. Mind you, I was a bit impatient and the engine was still pretty warm - a lot easier when cold!

[project.r.racing]

Is there a chance that I could've pinched the o-ring with the cap when doing it up initially thus damaging it?

Very possible. I purchased 2 cos it is a common problem when replacing them. 50% they don't work when replaced. Did you use a gasket sealer also?

[tbro]

Olly
Don't put any type of sealer on the o ring, its meant to seal on the rubber. Good hint USE GENUINE!!!!!!!!! as they fit , Aftermarket are the wrong section.

You can if you want put some loctite 515 on the bttm of the cap if you really think its necessary.

[project.r.racing]

Weird. My Mazda service manual say to use sealent.

[JBT]

See the attached diagram. It shows that the O ring should be lubricated but not sealed. What tbro said about using genuine O rings too.

[project.r.racing]

Yes sorry. I just noticed it is the other end of the camshafts that require sealent.

I purchased 2 OEM seals, so I got something right.