84 fieor-- 94 N* swap (Page 22/24)
Thunderstruck GT JAN 24, 11:05 AM
Boring you need torque plates, light honing you don't.
Neils88 JAN 24, 03:38 PM
Glad to hear you figured out the ring issue. Hopefully that solves the main issues.
mcfrandon JAN 27, 01:39 AM
ok so I got the right rings in pistons in the engine and it still smokes on deceleration.

what doesnt make sense is that it did this on the factory engine when i first got the 94 engine. smoked exactly the same. only thing that had changed was the headgaskets and seals.

now im on a completely different engine.. the 97 completely rebuilt and it still smokes the same.

I tried a leak down test but i couldnt get it to seal up to get any other reading than 100 percent leakdown but it certainly was not coming out of the dip stick or breathers. it sounded like it was either not sealing at the spark plug hole (has the o-ring) or the exhaust valves were not seating, or both. gave up tonight but i will be back at it again and with a comp test too but im sure that will come back ok.

mcfrandon JAN 27, 04:28 PM
interesting compression test results... all cylinders came in between 165 and 185psi except for cylinder 3 which came in at 225!

the only thing that has remained the same since the start of this was the right side head/lifters which cylinder 3 is in... weird.

Will JAN 27, 10:45 PM
A lot of oil on the bore can show high compression test readings.

Usually when a Northstar smokes it's due to high mileage and carbon buildup on the rings from the 80 year old owners never matting the throttle.
mcfrandon JAN 30, 12:04 AM
i was able to get the leakdown test done. seemed to come up between 10-15% on all cylinders
Will FEB 07, 06:10 AM
Rings don't flutter when the engine's stopped or at cranking speed.
IXSLR8 FEB 07, 12:16 PM
Maybe your new rings are still not completely seated just yet.

Or

Maybe you are sucking in oil from your heads through a leaking PVC tin cover in the underside of your valve cover(s).

What about your oil level? I've read on the Cadillac Forums that some say if you fill your block past the half way mark on the dipstick reading that the N* will use oil excessively.

[This message has been edited by IXSLR8 (edited 02-07-2016).]

mcfrandon MAR 08, 08:14 PM
ive tried running around with just breathers on the valve covers and no pcv. same problem


ive been driving it a bit now and it hasn't gotten any better. luckily sunday i picked a motor out of a 96 deville. im going to get started on this block and take it nice and slow. i wont be touching the cylinder walls at all. im thinking of putting pistons and rods and maybe boosting it one way or another. i see that you can get 4.4L superchargers on ebay still in packaging for $700 but im not so sure the belt routing would work or have enough room. I have read that it will bolt up to the heads though. Im going to look into it a little more cause i like the idea of its low profile and added power without having to run lines and new exhaust for a turbocharger. I'd really like to be in the 500hp area but i dont think it can be done on this engine all motor.
Will MAR 08, 09:13 PM

quote
Originally posted by IXSLR8:

Maybe your new rings are still not completely seated just yet.

Or

Maybe you are sucking in oil from your heads through a leaking PVC tin cover in the underside of your valve cover(s).

What about your oil level? I've read on the Cadillac Forums that some say if you fill your block past the half way mark on the dipstick reading that the N* will use oil excessively.




Taking technical advice from Cadillac Forums is... risky.


quote
Originally posted by mcfrandon:

ive tried running around with just breathers on the valve covers and no pcv. same problem

ive been driving it a bit now and it hasn't gotten any better. luckily sunday i picked a motor out of a 96 deville. im going to get started on this block and take it nice and slow. i wont be touching the cylinder walls at all. im thinking of putting pistons and rods and maybe boosting it one way or another. i see that you can get 4.4L superchargers on ebay still in packaging for $700 but im not so sure the belt routing would work or have enough room. I have read that it will bolt up to the heads though. Im going to look into it a little more cause i like the idea of its low profile and added power without having to run lines and new exhaust for a turbocharger. I'd really like to be in the 500hp area but i dont think it can be done on this engine all motor.



The supercharger doesn't bolt up to the non-supercharged engine.
The supercharger doesn't bolt up to the <'99 engine.