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Username Post: Fuel in oil...eeeek!        (Topic#358046)
ranman 
"2nd Year" Silver Supporting Member
Posts: 10807
ranman
Loc: The cold wet and windy O...
Reg: 03-10-01
09-14-19 12:28 PM - Post#2775509    

My friend with the 70 Z28 and carb problems has been interesting. I've had a hard time getting back over to help him with it since we got the Holley carb problems fixed. ie: wrong gaskets and bolts in the wrong holes etc. He told me his oil level was way high. I'm talking over a quart too high. He is meticulous about most things, so something was definitely wrong.
I went over last night and pulled the dip stick......... smelled more like gas than oil.
I was able to light the dip stick on fire. by holding a Bic lighter on it for about 1 or so seconds.
I never knew that gas could get past the rings like that from a very leaky carb, but I guess it can.
He's going to drain the oil Sunday before we have a chance to fire it up again for setting the timing and advance and the fine tuning the idle mixture screws.
Does he need to drain the engine and flush it with clean oil then flush it again with and add new oil?
...or just replace the old oil with clean oil and a new filter? I was thinking Mobil 1 10/30.
Again, this is a 1970 11 to 1 350.
I'm hoping from running the engine and diagnosing the fuel issues the diluted oil hasn't hurt the bearings. We probably have put an hour on the
engine during the many attempts at diagnosing the carburetor problems. During that time, the fuel got into the oil pan.

~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~
If plants ruled the world, would they regulate oxygen?


 


Shepherd 
Frequent Contributor
Posts: 1849

Loc: Lake George, NY
Reg: 11-11-15
09-14-19 01:05 PM - Post#2775511    
    In response to ranman

Based on your description , you certainly washed the cylinder walls. How much overfilled was it? Try and get the nose of the car up, this will help get most of the oil into the pan. Then let it down and drain it. When you take off the filter, drain it, cut it open, lay out the inner element on newspaper and look carefully for debris especially in the pleats, use a magnet for metal particles.



 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17390
grumpyvette
Age: 71
Loc: FLORIDA USA
Reg: 03-16-01
09-14-19 01:36 PM - Post#2775514    
    In response to Shepherd

http://garage.grumpysperformance.com/index.php?thr...

yes, a close inspection of the oil filter is a darn good idea,
yes, you need a new oil filter and an oil change,
and yes you need to find and fix the problems source thats allowing fuel,
to get into the engine before proceeding any further.
yes, you may have caused excessive wear, on the bearing's, lifters cam lobes
etc if the diluted oil was run in the engine for very long.

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 09-14-19 01:41 PM. Reason for edit: No reason given.

 
ranman 
"2nd Year" Silver Supporting Member
Posts: 10807
ranman
Loc: The cold wet and windy O...
Reg: 03-10-01
09-14-19 07:17 PM - Post#2775527    
    In response to Shepherd

  • Shepherd Said:
Based on your description , you certainly washed the cylinder walls. How much overfilled was it? Try and get the nose of the car up, this will help get most of the oil into the pan. Then let it down and drain it. When you take off the filter, drain it, cut it open, lay out the inner element on newspaper and look carefully for debris especially in the pleats, use a magnet for metal particles.


"He told me his oil level was way high. I'm talking over a quart too high. He is meticulous about most things, so something was definitely wrong."

It was high on the dip stick, about the same as the space between the full and add a quart marks, possibly a tiny bit more.

~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~
If plants ruled the world, would they regulate oxygen?


 
ranman 
"2nd Year" Silver Supporting Member
Posts: 10807
ranman
Loc: The cold wet and windy O...
Reg: 03-10-01
09-14-19 07:22 PM - Post#2775528    
    In response to grumpyvette

  • grumpyvette Said:
http://garage.grumpysperformance.com/index.php?thr...

yes, a close inspection of the oil filter is a darn good idea,
yes, you need a new oil filter and an oil change,
and yes you need to find and fix the problems source thats allowing fuel,
to get into the engine before proceeding any further.
yes, you may have caused excessive wear, on the bearing's, lifters cam lobes
etc if the diluted oil was run in the engine for very long.


What's the trick without a filter cutter?
There was no trace whatsoever of metallic particles on the oil on the dipstick when viewed with the light of a flashlight. That said, the engine hadn't been run for a week, so maybe that wasn't worth mentioning.
The engine had been run close to idle or high idle for about 30ish minutes altogether. Starting the engine for the first time was with new oil, so there was no fuel buildup when we started. The fuel in the oil built up (increased) gradually over that 1/2 hour or whatever amount of time it was run.


~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~
If plants ruled the world, would they regulate oxygen?


 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17390
grumpyvette
Age: 71
Loc: FLORIDA USA
Reg: 03-16-01
09-15-19 05:00 AM - Post#2775548    
    In response to ranman

be aware it's possible for a manual fuel pump to leak internally and slowly flood the engine with fuel in the oil.
I point that out simply because many people think the fuel might only come from a carb or injector related issue.
yes you stated it was the incorrectly assembled carb, but others reading the thread may have not considered the other possibility if they are having similar oil/fuel issues

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 09-15-19 05:03 AM. Reason for edit: No reason given.

 
Mel Foye 
*VIP* Founding Member
Posts: 4881
Mel Foye
Reg: 09-29-00
09-15-19 11:30 AM - Post#2775572    
    In response to grumpyvette

Good point Grumpy as I forgot in 1962 my 58 V8 pump went bad and filled the pan to the top and a little more.



 
ranman 
"2nd Year" Silver Supporting Member
Posts: 10807
ranman
Loc: The cold wet and windy O...
Reg: 03-10-01
09-15-19 02:09 PM - Post#2775585    
    In response to Mel Foye

Good food for thought Grumpy. Nothing has changed on the engine except for the carb rebuild.
I'm going to plug the holes in the old filter with hot glue then use my belt sander to remove the rim of the filter, then clean any grit off the filter housing before pulling it apart.
........... messy maybe, but I'm hoping it works.
He told me a while ago that he got almost 2 gallons out of the oil pan.
Hopefully he added too much oil as part of this equation.
He said the oil/or oil/gas "mix" was clean looking with no particles showing.
I'll let ya know how the pleats look. There was only a couple hundred miles on the car with the last oil change.

~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~
If plants ruled the world, would they regulate oxygen?


 
ranman 
"2nd Year" Silver Supporting Member
Posts: 10807
ranman
Loc: The cold wet and windy O...
Reg: 03-10-01
09-15-19 05:26 PM - Post#2775604    
    In response to ranman

There were a couple of tiny metallic looking piece in the pleats..... and I mean extremely tiny just like normal engine wear. I saw that same stuff in the pleats of the engine in my old pickup. The engine only has 7000 miles on it.
The car in on jack stands and the wheels turned slowly as we did all this playing with the engine. His odometer gained about 1 mile. It's a manual 4 speed, but the wheels still rotate a bit out of gear. He's not taking the engine down to check it. It's not in his budget nor does he have a place to do that.
It's going to get new oil and a filter, then another flush, then new oil and a good filter.
Anybody have a favorite oil for a solid lifter engine? On the Oregon coast our weather is pretty mild......... and this care is rarely driven. When it is driven, it's sunny and 60 to 75 degrees, never started in cold (chilly) weather.
The fella was adding STP to his regular oil and I told him that probably doesn't help anything.

As a side note, he showed me a write up in Chevy High Performance magazine for many years back. Some local guy did the photo shoot for it and wrote the article. After it was all done, they sent him a cowl induction hood as a thank you. Pretty cool. He still has the factory hood.

~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~
If plants ruled the world, would they regulate oxygen?


Edited by ranman on 09-15-19 05:33 PM. Reason for edit: No reason given.

 
ranman 
"2nd Year" Silver Supporting Member
Posts: 10807
ranman
Loc: The cold wet and windy O...
Reg: 03-10-01
09-17-19 03:29 PM - Post#2775745    
    In response to ranman

Found out the guy was adding STP oil additive, not the thick honey stuff. So he was using Delo 400 straight 30 weight. Rating API CF
I looked at Mobil's website and the 15 50 has 1200/1300 Phosphorous/zinc It's not the racing oil. https://mobiloil.com/~/media/amer/us/pvl/f iles/pdf...

Would that work for his LT1 solid cam?

We ran it for 10 minutes or so with new Delo 30 weight and new filter. That's getting drained, then we'll refill it with something better.

Drained the oil and got everything under control. Set the idle screws 1 1/2 turns open, then closed them 1/8 turn and have a steady 13 inches of vacuum. I think we are good there.


~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~
If plants ruled the world, would they regulate oxygen?


Edited by ranman on 09-17-19 03:37 PM. Reason for edit: No reason given.

 


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