Matthew Smith

Hey all,

I'll post the compression results I just received from the Mazda dealership. So far I'm seeing decent on the 1st rotor and tired on the second one. The story on this car is that it has sat for 5 years with only 500 miles added. The motor has been opened at some point, but I have no receipts from the purchase. I see the aftermarket sealant peaking out from the iorns and they are painted a different color. It puffed blue smoke on shifts only, when we test drove it. Now it's blowing blue smoke all the time and with the cap on the oil it's a dense light light blue fog that makes sure we are mosquito free after it is warmed up.

My question is if the outer oil control seal is blown would it give those compression numbers?

Matt

diabolical1

iTrader: (3)

welcome to the board, Matt.

first, it may help for you to tell us what generation car you have and include any mods as well (especially if it's a turbo car). next, since you specified that this behavior is with the oil cap on, my first question is how does it behave with the oil cap off?

my next question is have you been monitoring the oil level?

the compression numbers are not great, but if the car is starting fine and makes good power, then it's possible the numbers are not entirely accurate (I am very suspicious of dealers and their techs). so maybe include some info on how your car is behaving other than the smoke.

Matthew Smith

Thanks for the reply!

The car is a 3rd Gen 1994 RX7 with I believe to be the originally sequential twins. The car was given " reliability mods" by the owner before the one I bought it from. That seemed to include : Deleting the Cat and an aftermarket Downpipe, GReddy elbow, upgraded aluminum radiator and intercooler, a fuel pump that list 225LPH , some sort of injector upgrade maybe, pulley kit, removed the AWS , went through the vacuum lines, and a Power FC to round it out

From the get go I assumed it needed turbos, so I have already purchased 99 SPEC Efini's. They are not installed yet but after taking it too the gas station and coming back it started really throwing smoke out the tail pipe. I checked the Coolant and topped it off , it went down to half after driving it to the gas station. I thought I could have blew the inner seal and it could have been leaking coolant into the combustion chamber but I conducted the test, such as keeping the coolant cap off cold crank with the fuse removed to start, no bubbles. removed the spark plugs bone dry not even oil just some carbon build up. so Scratching my head there. then I checked the oil. It was honestly at 3/4 and so I did an oil change to full with 20w 50. Seems to be still dumping a ton of spoke. I read it could be the PCV valves if it smokes a ton with the oil cap on so I took the oil cap off and started it and it seems to make no difference. I'm pretty sure from the consistent start and drive test, the seals that I assume are leaking in the turbos have gone cause I'm telling you it is spewing smoke after warm up and on start consistent blue smoke. Coolant seems to be the same level so I'm not loosing that.

I read it could be the outer oil control seals could have blown but I'm not getting the Frappuccino effect in the oil. I went for that test for the compression numbers to see if it could be something with that but seems to be at minimum levels for compression.

Is there something I'm missing that could be causing a ton of smoke after warm up? I thought it was coolant but it doesn't immediately disappear, it stays around leading me to lean to just oil?

Current plan is to install the turbos and see what the car behaves like but I would love input to conduct any test you think would point me in a direction besides the turbo replacement.

Thanks a ton!

Matt

Redbul

iTrader: (26)

Did you premix with the right amounts? Sometimes people get the units mixed up. Do you have an afr gauge? Could be running rich, but that would be black smoke.

Check the crossover pipe to the intercooler. Any oil blowing through there (from the turbo)/?