Not sure what "ATF trick" you are referring to, but running ATF through the intake (like the old school Chevy guys did) will not work.
excessive blow by, compression and leakdown results inside
- Thread starter supraguru05
- Start date
jdub;1539217 said:
I always have my oil analyzed by blackstone and there has never been a high water percentage. Ive ran this motor like this for almost two years now and haven't shown any signs of a BHG. as soon as i get the car back ill bore scope the engine and take pictures, as well as take pictures of the plugs. After more research I will not be running seafoam in the oil, ill simply use some MCCC since its free to me. I like the water idea, might try that. I will also run a head gasket check in the coolant to see if there is any carbon traces.
just to clarify it was 6 months ago when i originally scoped it so what i remember as clean may not really be that clean, so one or more day till i get the car back and ill be able to overwhelm everyone with pictures and data.
Here are the NEW leak down numbers
Cyl1 25%
Cyl2 30% Leaking through cam vents (audible)
Cyl3 31% Leaking through cam vents (audible)
Cyl4 26%
Cyl5 23%
Cyl6 30% Leaking through cam vents (audible)
I also scoped the cylinders which i will upload pictures of shortly. my observations from the scope were as follows. cylinders 1,2,5,6 all looked similar. I could see the different heights on the pistons, there was dry carbon on the pistons with areas where the piston was clean. piston 2 had the most carbon. Cylinders 3 and 4 were both wet and appeared to have a thicker layer of carbon. This looked more like wet sludge than actually hardened carbon. Cylinder 3 especially looked bad. I have just put in the cylinder cleaner and will let it sit for a little bit. ill upload the bore scopes after my meeting with my professor about a school project.
edit: Just to point out I am not really looking for a solution, just kinda of documenting where the engine is and just getting opinions on anything that looks abnormal. At the end of the season, if the engine lasts that long, i will tear it down and inspect everything and update this thread again.
Borescope pictures
cylinder 1
cylinder 3
cylinder 3
cylinder 2
cylinder 5
cylinder6
Yes i realize they are terrible and just about useless but until i get a rca video card on my computer that is the best I can get.
Cyl1 25%
Cyl2 30% Leaking through cam vents (audible)
Cyl3 31% Leaking through cam vents (audible)
Cyl4 26%
Cyl5 23%
Cyl6 30% Leaking through cam vents (audible)
I also scoped the cylinders which i will upload pictures of shortly. my observations from the scope were as follows. cylinders 1,2,5,6 all looked similar. I could see the different heights on the pistons, there was dry carbon on the pistons with areas where the piston was clean. piston 2 had the most carbon. Cylinders 3 and 4 were both wet and appeared to have a thicker layer of carbon. This looked more like wet sludge than actually hardened carbon. Cylinder 3 especially looked bad. I have just put in the cylinder cleaner and will let it sit for a little bit. ill upload the bore scopes after my meeting with my professor about a school project.
edit: Just to point out I am not really looking for a solution, just kinda of documenting where the engine is and just getting opinions on anything that looks abnormal. At the end of the season, if the engine lasts that long, i will tear it down and inspect everything and update this thread again.
Borescope pictures
cylinder 1
cylinder 3
cylinder 3
cylinder 2
cylinder 5
cylinder6
Yes i realize they are terrible and just about useless but until i get a rca video card on my computer that is the best I can get.
Last edited:
wow mccc! havent heard mention of that stuff in forever. i had a pinging issue with my old motor due to carbon build up. i used the mccc after a few recommendations from a couple dsm guys. what i did was suck some thru a vac line and let some burn off. then pulled the plugs and poured it directly in the cyl. let it sit overnight, sucked out the excess, then dropped the oil. checked pistons again and they were amazingly clean and no more pinging!
right, wrong or indifferent, that's what i did and worked better than expected.
right, wrong or indifferent, that's what i did and worked better than expected.
The MCCC is now out of the system. Not sure if it helped the motor but i do know it hurt my wideband. Which is my mistake I should have pulled the sensor out but I forgot so now my wideband reads way wrong. It says I am at like 13.8:1 at WOT when yesterday I was at 10.5:1. I will recalibrate the sensor tomorrow before I go to the drag strip and see if that corrects it.
dbsupra90;1542916 said:
Yes I went.
1st run it ran 12.8:1 the whole way down the track. I confirmed that the gauge is correct because my MPH was up 2.5 over my previous best with no changes the car, and that is corrected for altitude. I was able to richen it back up with the safc 2 I have but i kept hitting fuel cut so I did not get a clean run. Ill be removing the MBC today and if the rain stops doing some on ramp pulls to see where it is at.
I'm confused on why all the sudden it got lean. The only thing that changed is I went from a stock elbow to a full ebay downpipe. Im on stock injectors, afm and ecu and never tuned the car. I figured since the karmen afm up front is measuring air flow directly that it would compensate for the better exhaust flow.