Water in oil. compression still ok
#1
Water in oil. compression still ok
Last Saturday when I was driving on track my car start to hesitate. I wasn’t overheating (water was 220F and oil 230F). When I open the hood I notice that my catch can was overflowing with oil.
Sounds like head gasket has gone bad. But why my compression results looks the same as when i didn’t have these problems?
- I check the compression. 173-170-169-175. Stock 8.8:1 pistons 100K miles driven. I got same compression result year ago.
- Oil-stick is full of milky cream
- Top of the catch can is full of (condensed?) water
- I fill up my radiator 500miles ago and look like there's about half a gallon shortage now
- I’m using 250cc/min water-injection but sounds odd if that water got past the rings
Sounds like head gasket has gone bad. But why my compression results looks the same as when i didn’t have these problems?
#2
If oil is blowing out it has to be high pressure in cylinder head right? Compression seems to be ok. And only 5-10psi higher with drop of oil so I assume that rings are ok.
So that leaves the head gasket or loose cylinder head bolts. Guess I can re-torque those bolts or maybe better, change ARP bolts there.
So that leaves the head gasket or loose cylinder head bolts. Guess I can re-torque those bolts or maybe better, change ARP bolts there.
#7
Cylinder head is off and I didn't found cracks or anything unusual. Guess if I want to be sure I have to get that leak-tested again. But I’m almost sure that cause of all this is my old head bolts which I been re-using over 6 times by now
Here’s a picture of water injected head: http://www.miata.fi/kuvat/head070711.jpg
Exhaust valves is covert with that “hard white stuff”
Here’s a picture of water injected head: http://www.miata.fi/kuvat/head070711.jpg
Exhaust valves is covert with that “hard white stuff”
#9
could not find anything just by looking at it, i did not extended my search too long since b6 are so cheap i ordered another one for next-to-nothing.
I went to a shop that did a leak down test, told me i had a cracked head, and i drove home just like if i stole it.i'm curently getting the engine out
I went to a shop that did a leak down test, told me i had a cracked head, and i drove home just like if i stole it.i'm curently getting the engine out
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