[Straitup D]

i did an oil change on my 91 1.6 miata yesterday and i realized that there is ALOT of oil leaking from the top of the back of the motor, is it common fo that just to be a VC gasket or is there a gasket between the head and the ignition?

 

[adamvanxxx]

CAS O-ring.
VC gasket.

 

[ryanXstorey]

CAS O-ring.
VC gasket.

^^^^ have you recently removed your valve cover?

 

[Straitup D]

sory for my ignorance what is the cas?

 

[dliverance]

Cam angle sensor.

 

[adamvanxxx]

Read through all of this, it is SUPER helpful.

http://www.miata.net/garage/garageengine.html

 

[SR20DE_MAN]

I'll narrow it down.

http://www.miata.net/garage/cas_seal.html

http://www.miata.net/garage/cas_oring.html

I can tell you one thing. It's not that hard to do, but if you do this at the same time you replace the valve cover gasket it's like 60 billion times easier. That & you can also clean off the CAS cover & put new RTV on the flat mounting surface of it. Won't have to worry about it for another 10 years.

 

[adamvanxxx]

You are welcome OP, there is a vast amount of info on this site and other sites.

If you don't know a word we will help, but try to search all of your problems first.

 

[Cuban Tony]

Yea I have some slight leaking in the same area and within the next few weeks plan on doing the timing so all of this will be address at the same time. Super excited.

 

[adamvanxxx]

If you do have a leaky CAS make sure you get it addressed before oil saturates your heater hose and make it burst. Happened over here. :hello kitty:

 

[Cuban Tony]

Yea since I am doing the rad at the same time I decided to get all new hoses also. Nothing crazy just oem replacement type stuff but so worth it.

 

[Straitup D]

Thnanks guys, orderd the VC gasket, but what size is the Oring that i need the homie at the parts store was not able to look it up

 

[adamvanxxx]

It's a Mazda piece. That was the only place I could find it. It was $5 at my local dealership.

 

[Cuban Tony]

If I am not mistaken this is the part http://flyinmiata.com/index.php?deptid=4548&parentid=0&stocknumber=04-26000 I know that doesn't help with the size but if all else fails locally you can always order that.

 

[whitebeau]

FM also has some sick tools to make a timing belt change waaay easier, wish i knew this before i did mine last week.

http://flyinmiata.com/index.php?dept=121

The cam ninja tool should be patented.. it's freakin epic.

 

[ryanXstorey]

That is correct.