Originally Posted by hammertime
Originally Posted by kod99
Here is the next installment in the milky oil saga:
- Put new oil in engine
- Installed #80 pill and left #38 nozzles in engine
- Heated oil pan to 110 degrees with pan heater
- Fired engine with fuel shut off all the way in
- Idling at 1500 RPM for 2 minutes. Engine vacuum at 13 inches
- Pulled fuel shut off out 1" and idle increased to 2200 RPM
- Engine vacuum still at 13 inches
- Engine temp increased to 150 degrees and engine vacuum dropped to 3 inches in 5 minutes
- Vacuum breather can emmitting steam / smoke like a '64 Chev with bad valve seals
- Chrome Dynatech headers on left engine bank turned beautiful shades of blue and yellow
- @#$%&*!!!
- The headers on the right engine bank are still chrome
- Shut engine down and pull valve cover
- No milky oil in heads
Questions:
Why did the vacuum drop so much when the engine heated up?
Why did only one side get so much heat as to blue the headers?
What's with so much alcohol steam coming out of the vacuum pump breather?
Does a 598 BBC make a good boat anchor?
Did better but, I can not stress enough about the fuel shut off needing to be fully in ONLY on the race track. Once it starts pull that bad boy out.
Vacuum dropping when when its warm, would tell me something isnt sealed internally when it warms up, do a warm leak down test and make sure the rings arent the issue ?
One side of the header is blue, possibly make sure none of the nozzels are plugged on either side, blue chrome headers can be cause from to lean or to rich (fuel burning in the header) .. I tossed the chromes years ago now, look on the internet for stuff called "blue out" buy a few things of it, and get ready for a lot of elbow work.
Steam out of the vacuum canister is normal to a point, how much is a lot ? like a train or like a exhaust on a cold day ?
I've never been a fan of a 598 tall deck motor, they never seem to run worth a darn. That being said,
www.apdracing.com is building me a new 598 short deck motor right now and should be done in a few weeks, looking for north of 1050hp.
Thanks Hammer.
I am going to do a cold leakdown test, then heat it up and do a hot leakdown test.
The fact that I had nearly 2 gallons of methanol in the oil pan and none out of the exhaust, even when it was cold, indicates to me that there must be some huge bypass going on inside the engine.
The steam coming from the breather is like a train, and the car was inside a warm shop when I fired it up.
I post the results.