BLK90TII

Well I have a decently modified 90 TII. I just had the motor rebuilt and ported. It has a 4k on it. I've done 3 oil chnges on the car since I've had it back and everytime the oil has come out like water. Also everytime I check the oil it drips off the dipstick and doesn't feel very gooey like oil should. I was wondering if this is a heat problem? Also could I solve this problem with a second oil cooler or just a bigger one? BTW the oil doesn't smell like gas. Any suggestion are appreciated. Thanks.

Turbonut

iTrader: (1)

What's your oil pressure, type of oil, and oil viscosity?

bingoboy

does your engine flood? if so gas will get in with the oil and thin it out.

BLK90TII

I'm using the stock oil pressure guage and it reads off the scale when the car is warm. I'm running valvoline 20w50 VR1 and the viscosity grade is "SJ". Hope that helps. Now that you've brought up viscosity could breifly explain the grades?

BLK90TII

No flooding whatsoever.

andrew lohaus

this sounds realy strange. i remember the one time i ran 10w40 the pressure would rutinely not be as high as with 20w50 but it still looked like normal oil when i drained it. maybe there is some sort of blokage causing the pressure to excede the stock gauge. do you have a higher pressure oil bypass? general overheating issuies?

BLK90TII

Water temps stay at stock levels or below and I'm running the stock oil bypass pellet. The car has never been overheated in the 2 years I've owned. Also all of the mods have been preformed in the 2 years I've owned it. I also have new RB SS oil cooler lines on.

BLK90TII

Do you think running a good synthetic premix and synthetic engine oil would help to solve my problem?

andrew lohaus

maybe your oil pressure gauge is busted. when you said the oil was watery was it hot when you drained it, cus that will make it thiner looking than when you pour it in.

Turbonut

iTrader: (1)

To answer some of your questions:
http://www.valvoline.com/carcare/art...=ccr20010101ov
If the oil is drained when hot, it will run out like water. If you really feel there may be a problem, hook up an oil temp ga.

Icemark

An oil temp gauge should be used long before money is wasted on trying to further cool the oil over what the stock system does.

and if you really think it is a thinning issue, send the used oil sample out to one of the many labs that check your oil. It's typically between $50 and $100 and will tell you what is really happening.

And I personally have seen quite a few issues related to using valvoline oils in dual cam/ multi valve engines and do not recommend them at all.

BLK90TII

I was thinking an oil temp guage would be a good investment along with an oil pressure guage.
Turbonut: Thanks for the link to that info. It was very informative.

BLK90TII

Just for ***** and giggles what oil pressure and temp should I be looking to see when I install these guages?

RETed

Who did the porting on the engine?
Who did the rebuild?
It seriously sounds like excessive blow-by that's causing your problems.

Oil pressure:
http://fc3spro.com/TECH/MODS/EL/opress.htm

Oil temp:
http://fc3spro.com/TECH/MODS/EL/otemp.htm


-Ted

jdonnell

iTrader: (1)

Try getting your oil analyzed. My oil thinned and it turned out to have a high volume of fuel in it (6%) that lowered its viscosity from W50 to W30. The Analysis is only about $20 from Oil Analyzers. I still havent determined why it is getting diluted by gas? Like you, I had no symptoms except thinning oil and in my case, a fuel odor.

rxseven

I have similar problems and installed and oil temp gauge but I find that oil temp stays at 160 or below even with very hard driving and stop and go. This is a brand new oil cooler though and the engine is a jspec with unknown miles. The problem is excessive fuel dilution. In case of a new rebuild like yours, I suspect incorrect porting which is causing fuel to get past the side seals.

BLK90TII

For those of you who have a known oil dilution problem I suggest that you try changing your injectors, o-rings, and gromets. I think my problem is that I'm probably not waiting long enough to let the oil cool properly before I check it. Here shortly I'm going to check it since my car has been sitting since about 5pm and it's like 30 degrees outside. Hopefully this will give me a warm fuzzy about my car. I probably just overreacted to the situation.

RETed

The other quick-and-dirty test is to actually light the contaminated oil with a match to see if it catches on fire.


-Ted

ponykiller

Will burning gasoline raise oil to its combustion temperature? I would be very, very careful doing what RETed suggests, otherwise you might end up with an oil fire (very bad).

Turbonut

iTrader: (1)

Just another thought, when you drain the oil stick it immediately with a thermometer. That will give some indication of the temps.

RETed

I don't mean to light the whole mixture that drains out of the oil pan!
You can just try and light a spoonful taken from the oil pan drain.
If your nose is sensitive, you can just smell the oil.


-Ted

andrew lohaus

sorry if this is off topic but i love all the cute girls in your avatar ted. its so great.

jdonnell

iTrader: (1)

BLK90TII, what you suggest is I'm afraid the right answer. My dilution started occurring after I removed the injectors and sent them out for cleaning. I re-installed them w/new grommets and ever since then fuel smell has been more obvious. New injectors are $$$. Any cheap places out there to buy them?

ponykiller

I just had the mental image of someone striking a match and tossing it into the catch pan, then having their house burn down.

BLK90TII

Guys sorry I haven't replied to this in a while, but I've been very busy at work and trying to get some simple things working correctly on the car.
Ted that's an interesting suggestion. I think it's funny, but also a good idea. I do have a sensitive nose and have smelt my oil and it doesn't smell like gas, but it has a slight hint of something else. I think it might be premix. I'm not sure though. Whatever it is is very faint. BTW thanks for the link to fc3spro.com. I haven't been there in a long time and thought they had shut down thier site (due to me not being able to access it). On a good note I got my stock oil pressure guage working correctly again and it seems that pressures are fine, but I do plan on upgrading to an aftermarket guage and a RB 80 psi oil pressure regulator. Thanks for your help(all of you).
Jdonnell I don't think I know of anywhere cheap that you can get injectors, but here are a few sites you may want to check out : rx7.com, rx7trix.com, srmotorsports.com, and sportcarmotion.com. Any of these places should have what you are looking for. Keep in mind though that I've only done business with rx7.com. I've always gotten great service from them, but their prices are a little steep. Good luck, hope this helps.