[fast72lemans]

I pulled my year old 474 out in the fall due to the coolant getting pressurized, The last pass I made it went 10.90 @125.50 and pushed some water out the overflow. I pulled the engine and found the headgaskets (cometic) seeping. The deck surface was a bit to rough for my liking so I used felpro 1016's and reassembled. My first pass was good except a shifter adjustment(couldn't find first on the line, left in second gear), went 11.05 at 125.20. Fixed the shifter and ran again, went 11.20 @123.90 spinning and blew oil out the dipstick. Pulled the plugs, found oil on #7, the rest were perfect. Did a cylinder leak down when I got home, found the following:

1 3 5 7 2 4 6 8
15 25 10 15 15 15 15 10


I double checked the oil level, changed the oil and ran 6 instead of 7 qts, Drove it on the street, no oil. Change the plugs, back to the track, went 11.19 @122 blowing oil, but not as much. pulled plugs, oil on 5 and 7. I was hoping to run Pinks All out at Maple Grove on the 15th but it's not looking good. Any ideas, I have less than 2 weeks to figure this out or put another engine in.


Mark

[68gtoMN]

You're pressurizing the crankcase from somewhere and that might be forcing oil past your rings. Clearly, you are forcing oil out the dipstick (path of least resistance). I'd say your head gasket seal is not right... Just a wild, first guess

[Ron H]

You running an evac set up? If not, it's time.

[steve25]

Cylinder 5 is not looking too good! coolant leakage could have near hydro locked that cylinder and cracked the rings, deformed a piston and or distored the cylinder wall with the result of oil being drawn into cylinder 5 and being burned is also being sucked into cylinder 7 during overlap and showing up on its spark plug!

Not to mention the fact that antifreeze is not a good lube in the least when it comes to protecting the cylinder walls, so re- honing and re-ringing #5 and #7 may be in order if all else checks out .

[fast72lemans]

Ron, it's in the works as we speak. I was thinking the pass when all this started, it spun and shook the tires. I wonder if the lower dipstick tube could have came off in the pan? Maybe I'm just looking for the easy button?

[Goat-Racer]

My old 421 used to push oil out of the dip stick tube and blow ot all over the firewall and fenderwell on a pass. If I remember right, I left out the lower dip stick tube once and that may have been when the problem started. As a temporary solution to an otherwise healthy engine, I removed the dip stick and installed a long 3/8" rubber vacuum cap over the tube. Problem gone, and it never pushed any oil out of the v/c breathers either.
This may be your temporary solution for Pinks if you feel the engine is in good enough condition to survive the weekend.
Don't forget to dump the coolant and run straight water for the weekend so Rich doesn't make an example of you on national TV because you put green stuff down on his track! Hopefully that won't happen and you will survive the weekend to properly solve your problem.

[fast72lemans]

That might do the trick, I'm going to run a camera up though the drain plug and do some exploring tonight, I hope to find a missing lower tube.

Mark

[Tom Vaught]

For the time being:

1) Check the oil level, (by draining the oil and adding the correct amount of fresh oil).
If the dip stick lower tube is off the stick will not read right.

2) Install the rubber "oil tube cap" or use a piece of fuel line hose with a course thread bolt threaded into the end and several clamps.

3) Fix the issue after your race.

Tom Vaught

[Bad Influence Racing]

Sounds like you need a freshen up. Excessive windage is pushing the dipstick out and you are gtting oil on the plugs which normally means you are getting compression into the crankcase now. Won't usually happen with normal low rpm street driving, but when at the track, under a laod and at rpm, it will come into play.

[Super68GTO]

I had the same problem with my old 463. Blew oil all over the firewall every pass out the dipstick tube. Put an E-vac kit on it and solved the problem.

[Bad Influence Racing]

Super-
Yea, it is caused by excessive windage. I try to run vacuum pumps on everything but if not in the budget, an evac will help, just doesn't pull a ton of vacuum. He will need a freshen up because of the fact that he is oiling the cylinders.

[66bonne]

I agree with those that are advocating a lack of positive crankcase ventilation. You are displaying all the classic symptoms. At the recommendation of P-Dude I am running a vac pump on my new set-up and love it - no blow-by the rings !! No fouled plugs !!

Jim

[Bad Influence Racing]

You won't always get fouled plugs with oil with too much windage. Just leaking out the seals and launching dipstick tubes is the common problem. The more stroke and rpm, the worse it gets..

[fast72lemans]

Looks like I have 2 problems, I could not see the tube with the video scope due to the header to drain plug clearance but I was able to look in the pan, no tube laying in the bottom of the pan. I did inspect 5 and 7 cylinders and found oil dripping out of the intake valves. Now to see if I can get a vacuum pump on before this weekend.

[fast72lemans]

Plugged the tube last night, made 2 full passes, oil is under control again. Nothing out of the breathers and it ran perfect.

[Goat-Racer]

Good deal! Now enjoy yourself at Pinks and you can worry about it after you win the 10K.

[J.C.you]

alittle off topic, but where and what brand scope did you use to look at the cyls? i have been wanting to get one.

[fast72lemans]

JC, it's a Matco Tools MVS3610WW. It is very easy to use and comes with mirrors of different sizes and angles.

[fast72lemans]

Originally Posted by Goat-Racer

Good deal! Now enjoy yourself at Pinks and you can worry about it after you win the 10K.

Thanks for the confidence in me....lol! I have 4 passes this year in the car, hoping just to have a good time and go as far as my luck will take me.

[bad69bird]

Originally Posted by fast72lemans

JC, it's a Matco Tools MVS3610WW. It is very easy to use and comes with mirrors of different sizes and angles.

Mark,

How much was it?