- Joined
- Jun 14, 2023
- Messages
- 8
Ok so, this is on 2006 IS250. Worst engine ever btw. And wow what a pain to do the plugs. Like 10x the work compared to BMW (n52 the only other car I've done spark plugs lol) with the manifold removal etc. Anyway. As I'm finishing up I notice a rubber gasket that sits right on top of where you would thread in the spark plug. I'm not talking about the one that goes around the coil and sits on top of the valve cover. And it's also not anything internal - I am positive the valve cover has never been taken off.
Basically I'm really confused. I did not think that this was a thing that exists on any car. The spark plug already has a metal "gasket" that kind of acts as a crush washer built in, right. So the seating surface should be metal also? I could not find any reference to the existence of this kind of rubber gasket anywhere.
I'm also now unsure if the rest have it as well. It's hard to notice because the part where the plug sits is deep, and thus is dark, and it's not unusual for the metal to be dark as well from carbon or whatever. It did feel kinda weird torquing them in hindsight. I'll have to re-check everything. But I need guidance as I have no idea why it's there, whether it should be there, and what's going on.
I'm attaching pics, was hard to get it to focus but you can definitely see it.
Advice is very much appreciated. Also, would it prevent the car from starting if it shouldn't be there, but is? Or vise versa? It does affect how deep it would sit in the combustion chamber by a couple mm. But is that significant enough to cause a no start or would it just run poorly?
Basically I'm really confused. I did not think that this was a thing that exists on any car. The spark plug already has a metal "gasket" that kind of acts as a crush washer built in, right. So the seating surface should be metal also? I could not find any reference to the existence of this kind of rubber gasket anywhere.
I'm also now unsure if the rest have it as well. It's hard to notice because the part where the plug sits is deep, and thus is dark, and it's not unusual for the metal to be dark as well from carbon or whatever. It did feel kinda weird torquing them in hindsight. I'll have to re-check everything. But I need guidance as I have no idea why it's there, whether it should be there, and what's going on.
I'm attaching pics, was hard to get it to focus but you can definitely see it.
Advice is very much appreciated. Also, would it prevent the car from starting if it shouldn't be there, but is? Or vise versa? It does affect how deep it would sit in the combustion chamber by a couple mm. But is that significant enough to cause a no start or would it just run poorly?
