E16 motor smoking

Gavin · Nov 22nd, 2004, 07:00 AM

Hi,

I recently overhauled my sentra 1.6 carb motor, doing the rings bearings and cylinder head. The prob i'm having is that everytime u start the car up it smokes being bluish in colour.After startup no smoke. If u drive normally there is no smoking. If let to idle and then rev it it smokes as well also bluish white in colour. I also have a little oil in the air cleaner box, but is not bad more like a smear of oil. And the air filter is still dry. I still need to do a compression test today to check the motor out, but my gut feeling is telling me that either the guides or valve stem seals are leaking. Any thoughts.

Dean GXE · Nov 22nd, 2004, 08:34 AM

Sounds like your right

Crazy-Mart · Nov 22nd, 2004, 12:03 PM

had that same problem since my rebuilt too ... problem on mine is that i was blowing up a few valve seal from the guide... IMO i didnt gap the piston rings correctly and might be getting to high of compression on the middle cylindres ... As i gapped the first piston rings (they were mostly perfect without any adjustment) i taught they were all the same so i didnt mind too much about the other 3

... if you dont have like me 2 valve spring on, you might be able to look at them just by opening the valve cover...

I could also be too much oil in the pan ... i do get smoke a lot when i change my oil ... as i fill the 4litre completely into the engine ... and smoke like hell in the 1st week...(tends to clean the carbon build up !! lolllll)

Slacky · Nov 23rd, 2004, 12:24 AM

i'd deff say valve seals also, especially if it consumes a lot of oil

Gavin · Nov 23rd, 2004, 03:34 AM

Thanks for the reassurance guys. I did a compression test last night and all the cylinders are 12bar. Which is good. I also preformed a wet test, resulting in only a minor increase in pressure uptp 12.5. So i guess i'm going to have to see if any of the stem seals are loose, otherwise strip the head off.

Slacky · Nov 23rd, 2004, 12:11 PM

i actually have valve seals for a e16i that i will never ever use, where are u located?, lol actually i have a whole engine also

recycled_toddler · Nov 26th, 2004, 11:56 AM

I don't know if any good wrencher has ever told ya: All new or rebuilt engines burn some oil during break-in. So, with that in mind: (a) How'd you break-in your car? (b) How many miles now? (c) How much oil being used...quart per ??? miles? Lemme know... --RT