I am calling around to a few local shops this morning to get it in there for a compression check and a leak down. 
Engine Build Gone Wrong?
Thread Starter
TECH Fanatic
iTrader: (13)
Joined: Sep 2006
Posts: 1,434
Likes: 3
From: Houston TX/Worldwide
Ok get this car went back to the builder and here was the details.
Car used a total of 5qts getting there (4.5hrs)............... She pulled over a few times to check it.
They pulled the plugs and all were soaked in oil
Pulled the intake and it had oil all in it.
Catch can was full of oil.
So guess what they removed the catch can out of the loop and added a filter on the valve cover however this makes really no sense to me. Wife said it stopped smoking. I have still yet to get him to do a leak down test. Its almost like there is something to hide. To top it off he put it on the dyno and made a few pulls with still not understanding why it ate the oil. This is driving me crazy............
Can anyone explain this........
Car used a total of 5qts getting there (4.5hrs)............... She pulled over a few times to check it.
They pulled the plugs and all were soaked in oil
Pulled the intake and it had oil all in it.
Catch can was full of oil.
So guess what they removed the catch can out of the loop and added a filter on the valve cover however this makes really no sense to me. Wife said it stopped smoking. I have still yet to get him to do a leak down test. Its almost like there is something to hide. To top it off he put it on the dyno and made a few pulls with still not understanding why it ate the oil. This is driving me crazy............
Can anyone explain this........
Thread Starter
TECH Fanatic
iTrader: (13)
Joined: Sep 2006
Posts: 1,434
Likes: 3
From: Houston TX/Worldwide
What I think it is.....
1. Rings were gaped wrong.
2. RA on the cylinders was incorrect causing the rings not to seal
3. In correct ring size.
I think it has so much blow by that its pushing the oil into the intake and oil catch can. Its coming from the rings not sealing and the only way you can see this is with a leak down test. A compression check was done and he said it checked good but that does not tell me what % of leakage I have.
Thread Starter
TECH Fanatic
iTrader: (13)
Joined: Sep 2006
Posts: 1,434
Likes: 3
From: Houston TX/Worldwide
Ok lil update. They made 10 dyno pulls and did not use oil. Car made 390rwhp and I guess this ok???? for a low comp n/a 408 combo thru a auto with a 3800 stall.
Wife is on her way home and will be checking the oil again. If it uses any then she will be back tomorrow and they will rip the out out for a complete rebuild.
Wife is on her way home and will be checking the oil again. If it uses any then she will be back tomorrow and they will rip the out out for a complete rebuild.
Thread Starter
TECH Fanatic
iTrader: (13)
Joined: Sep 2006
Posts: 1,434
Likes: 3
From: Houston TX/Worldwide
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
I am pretty sure that it isnt in Houston. I think I know where it is but I am not letting the cat out of the bag just in case...
Good luck getting everything worked out!
It's either the rings were filed incorrectly, or just put on wrong. Each piston/ring has it's own home in each cylinder. Sounds like to me the builder or machine shop didn't do their job.
don't know if thats the case here but you would be surprised at some of the things that get done
Thread Starter
TECH Fanatic
iTrader: (13)
Joined: Sep 2006
Posts: 1,434
Likes: 3
From: Houston TX/Worldwide
Why would you spray a low compression engine that was built for FI. No doubt the heads and pistons will make for a poor nitrous application.The HP/TQ will be relatively low in comparison to a purpose built 408 nitrous engine,also the engine won't produce much grunt N/A either.
.Ok the builder wanted it back however I had a leak down and compression check done on the motor by a 3rd party.
Cylinder #1 10%
Cylinder #2 20%
Cylinder #3 8%
Cylinder #4 8%
Cylinder #5 5%
Cylinder #6 20%
Cylinder #7 10%
Cylinder #8 10%
Compression was 145-150.
So everything is within range from what I know besides cyl 2 & 6. Guy pulled the plugs looked caked up with oil crap. Thinks its not venting enough for the crack case.
Why would I be having excessive crankcase pressure?
Last edited by 1INSANEGTO; Oct 16, 2009 at 03:24 PM.
If i paid a machine shop to build a engine it better be less than 8% ...10% absolute MAX!
Leaking 10% of your combustion into crankcase is like pouring CRAP into your oil...engine aint gonna last veryt long!
I bet your oil looks dirty fast.
Leaking 10% of your combustion into crankcase is like pouring CRAP into your oil...engine aint gonna last veryt long!
I bet your oil looks dirty fast.
I really hate to tell you this....anything over 5% is too much. I hope you get it solved with out too much stress on you.
Thats also why your compression is a little low..i would expect at least 160 arcross ALL the cylinders in a fresh motor.
Thats also why your compression is a little low..i would expect at least 160 arcross ALL the cylinders in a fresh motor.
Thread Starter
TECH Fanatic
iTrader: (13)
Joined: Sep 2006
Posts: 1,434
Likes: 3
From: Houston TX/Worldwide
Cylinder #1 10% OK but pushing it
Cylinder #2 20% BAD
Cylinder #3 8% GOOD
Cylinder #4 8% GOOD
Cylinder #5 5% Very GOOD
Cylinder #6 20% BAD
Cylinder #7 10% OK but pushing it
Cylinder #8 10% OK but pushing it