Quick96Z

I gotta thank everyone for all the help with my car, she runs like a raped ape. I did ported lt1's with 230/236 and all the fun stuff to go along.

I got one minor question...i have a few spark plug wires zip tied together just to keep them out of the way, could they arc to one another and cause a miss at all? i have msd 8.5mm.

My oil kinda has a gas smell to it, and i was just curious what would cause this. My PCM has been tuned for my 30# injectors. What do u guys think?


trav

scoobysnax83

Honestly, if you have any gas in your oil you are getting blowby, which happens when you have worn out piston rings. You should be fine with the wires though. How many miles on the LT1?

Quick96Z

86,000 miles on her. When i had the heads off i was looking at the cylinder walls, and they looked great. Still had the cross hatch and everything. Damn piston rings!! You think a little bit of blowby is a big deal? I'm prolly gonna leave the motor as is for a year or two, then 383 here we come!

trav

scoobysnax83

nah I think you will be fine. It may fix itself with some time if the motor had been sitting for awhile. My Z with 158,000 miles still had the crosshatches, so I don't know how good of a comparison that it. Best of luck with the engine.

Quick96Z

i'm gonna drive it to college and back tomorrow (70 miles round trip), then change the oil and re-torque intake and exhaust bolts for the second time. Does that sound like a pretty good plan to you?


trav

JodyJ

I'm having the same problem with the oil smells like gas. Does your motor burn oil? Mine does both and my motor was rebuilt last year with all new parts.

Just curious, did you have your heads milled? I heard that if you have milled you heads some many thousands of an inch, you will have to mill the intake also. Please somebody correct me if I'm wrong.

Thanks,

Jody J.

scoobysnax83

Sounds like a good plan to me.

Quick96Z

i dont burn a drop of oil, and my heads didn't have to be milled down. Sorry man, but i cant help you with your issues.

good luck to us both


trav

scoobysnax83

Well, if you have milled your heads A LOT, then you probably will have to have the intake matched up, but that is only in extreme conditions. Another thing is that every time you mill your heads you raise the compression in a cylinder. Which if taken to the extreme could raise the compression to a level which cause blowby in a higher mileage engine.

JodyJ

Thanks for the feed back Dave. Yes, I think my heads have been milled .020 of an inch or more, but I'm not sure since the rebuild and my engine builder no longer exist.

Is there a way to test for blowby for each cylinder to find out which one it is?

Thanks,

Jody J.

P.S. Sorry for hijacking the thread.

scoobysnax83

Unfortunately it is hard to find blowby with a simple compression test on all the cylinders due to the fact that the combustion of gas in a cylinder raises the pressure substantially over just air being compressed in a standard test. Hopefully someone will be able to come along and help you with this, but you could still possibly narrow it down with a compression test.

However, if you are doing rings on one cylinder than you will be doing it on all the cylinders, so either way determining which cylinder it is is pointless. What is relevant is that you determine that you are getting blowby.

Someone will for sure be by in the morning with some help. I would suggest starting your on thread and maybe linking to this one so you don't have to reexplain yourself

RE AND CHERYL

The easiest way to check for blowby is to do a leakdown test. It will tell you what percentage of the pressure the cylinder is keeping in. You can also listen in the exhaust, intake, and valve cover oil cap to hear where the air is going. A new engine with normal rings will be between 4 and 8%, over around 25% the engine is prety worn out. A leak down test is a bit more complicated than a compression test, but it can tell you more about your engine.