Jump to content
SAU Community

Recommended Posts

Well my silvia has been running great on the road but have not been driving it at all almost while im sorting some stuff (so its been sitting for a week or so) and I was behind the car when i had someone else driving at and it seemed when the gear was changed that white / very light blue smoke was coming out the tail pipe? i know before i had smoke coming out of the engine because i didn't tighten the bolts on the exhaust manifold but that was fixed. Any other ideas what it might be? the iacv, pcv, air filter, fuel filter, throttle body, all that is either new or been cleaned but its not that. Timing chain was fixed so the car is in time. New oil was also added in.

Or maybe the car needs to be driven on a more daily basis? I also put new fuel in.

might be a long shot but I noticed when I had a boost/vacuum leak on my 93 gtr in ran very rich and this caused the car to smoke when I would shift without boosting the car hard. anytime I boosted it would run clean as fak. also if I let the car idle to long it would stumble. I addressed the leak(iacv and intake gaskets) and havent seen smoke since or had a stumble(plugs would fowl from sitting to long in a rich state until I gave it a good boost to clean it out. mine was faint white smoke but you could smell fuel not coolant or oil. I do get the odd smell of oil here an there but I think my -5s are on the way out lol....good luck mate

On 3/18/2020 at 7:17 PM, MoMnDadGTR said:

might be a long shot but I noticed when I had a boost/vacuum leak on my 93 gtr in ran very rich and this caused the car to smoke when I would shift without boosting the car hard. anytime I boosted it would run clean as fak. also if I let the car idle to long it would stumble. I addressed the leak(iacv and intake gaskets) and havent seen smoke since or had a stumble(plugs would fowl from sitting to long in a rich state until I gave it a good boost to clean it out. mine was faint white smoke but you could smell fuel not coolant or oil. I do get the odd smell of oil here an there but I think my -5s are on the way out lol....good luck mate

thanks man but wouldnt i here if i had a vacumm leak? would this cause oil fouled spark plug to? car also has some fuel smell inside i tighted the exhaust manifold cause a while ago it smoked and it made alot of difference but then i could smell it again.,

 

ill try to keep this short. plugs could be black from fuel or oil. I would pop the oil cap off and take a sniff and see if it smells like fuel in your oil. this can be caused by fuel sneaking past rings when firing. I also over filled my oil real bad back in the day on a r32 gtr and this caused blow by and I had the black plugs with rich oil smell(also popped dipstick). im always optimistic and like to assume its not internal problems but sounds to me like your motor might be getting tired. once I dropped my oil when I over filled it and changed it to proper level my issue was completely gone and the fuel smell in oil was completely gone as well I think I caught it early enough before I did real bad damage. a motor that runs too rich all the time or to often will be very hard on the rings and can wash them out. I find even with my car I cant pussy foot it or it starts smoking a bit of white out exhaust and smells like fuel and my spark plugs start acting up. I get on it and it cleans up and goes like hell. ill keep in touch I think we can solve this. no you wont always hear a vac leak either. need to test system or spray brake cleaner around your motor when its running and listen for sputters. cheers

On 3/22/2020 at 10:02 PM, MoMnDadGTR said:

ill try to keep this short. plugs could be black from fuel or oil. I would pop the oil cap off and take a sniff and see if it smells like fuel in your oil. this can be caused by fuel sneaking past rings when firing. I also over filled my oil real bad back in the day on a r32 gtr and this caused blow by and I had the black plugs with rich oil smell(also popped dipstick). im always optimistic and like to assume its not internal problems but sounds to me like your motor might be getting tired. once I dropped my oil when I over filled it and changed it to proper level my issue was completely gone and the fuel smell in oil was completely gone as well I think I caught it early enough before I did real bad damage. a motor that runs too rich all the time or to often will be very hard on the rings and can wash them out. I find even with my car I cant pussy foot it or it starts smoking a bit of white out exhaust and smells like fuel and my spark plugs start acting up. I get on it and it cleans up and goes like hell. ill keep in touch I think we can solve this. no you wont always hear a vac leak either. need to test system or spray brake cleaner around your motor when its running and listen for sputters. cheers

Hey man i noticed about 200km ago i changed my oil and its almost all gone! I went to pull up the dipsrick randomly to check and noticed the bottom part of the dipstick only had oil on it! now im worried that ive cause major internal damage. do you think this has to do with the valve guides?

1 hour ago, GTSBoy said:

I refer you to post #2.

Do you think it could be the pcv valve? Reason i ask cause is i remember cleaning it out a while ago and there is a bit of rattle when you shake it but if you shake it in certain positions you cant hear any rattle.

 

5 minutes ago, KiwiRS4T said:

Bite the bullet - do  a compression test.

I did so many times and latest is 130 across the board. But problem is there is oil on the pistons so that might be sealing it up. I had different readings each time but the car wasnt working then but now the latest is 130.

Do a leakdown test, to see what the rings might be like. But keep in mind a few things. Compression rings are not oil control rings. Oil control rings are not compression rings. Leaking valves have nothing to do with leaking valve stem seals.

Edited by GTSBoy

could be a combination of a few different inperfections and weaknesses in the engine. I think its time for a motor rebuild m8 get her healthy again. at least that's what I would be doing at this stage. 

sorry for double post, but could try blocking pvc system and running a catch can setup to see whats going on, may be a waste of time tho...just to clarify are you running a sr20 or an rb in your car? I had a integra type r once with a b18c5 it burnt 1 litre of oil to 3 tank of fuel but would smoke like absolutely crazy from the exhaust blue. I feel like if your rings were shot it would smoke quite a bit more than just on shifts.  valve stem seals m8 or something weird internally maybe.....rebuild the engine and slap  a new turbo on it start fresh.

Edited by MoMnDadGTR

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • So, that is it! It is a pretty expensive process with the ATF costing 50-100 per 5 litres, and a mechanic will probably charge plenty because they don't want to do it. Still, considering how dirty my fluid was at 120,000klm I think it would be worth doing more like every 80,000 to keep the trans happy, they are very expensive to replace. The job is not that hard if you have the specialist tools so you can save a bit of money and do it yourself!
    • OK, onto filling. So I don't really have any pics, but will describe the process as best I can. The USDM workshop manual also covers it from TM-285 onwards. First, make sure the drain plug (17mm) is snug. Not too tight yet because it is coming off again. Note it does have a copper washer that you could replace or anneal (heat up with a blow torch) to seal nicely. Remove the fill plug, which has an inhex (I think it was 6mm but didn't check). Then, screw in the fill fitting, making sure it has a suitable o-ring (mine came without but I think it is meant to be supplied). It is important that you only screw it in hand tight. I didn't get a good pic of it, but the fill plug leads to a tube about 70mm long inside the transmission. This sets the factory level for fluid in the trans (above the join line for the pan!) and will take about 3l to fill. You then need to connect your fluid pump to the fitting via a hose, and pump in whatever amount of fluid you removed (maybe 3 litres, in my case 7 litres). If you put in more than 3l, it will spill out when you remove the fitting, so do quickly and with a drain pan underneath. Once you have pumped in the required amount of clean ATF, you start the engine and run it for 3 minutes to let the fluid circulate. Don't run it longer and if possible check the fluid temp is under 40oC (Ecutek shows Auto Trans Fluid temp now, or you could use an infrared temp gun on the bottom of the pan). The manual stresses the bit about fluid temperature because it expands when hot an might result in an underfil. So from here, the factory manual says to do the "spill and fill" again, and I did. That is, put an oil pan under the drain plug and undo it with a 17mm spanner, then watch your expensive fluid fall back out again, you should get about 3 litres.  Then, put the drain plug back in, pump 3 litres back in through the fill plug with the fitting and pump, disconnect the fill fitting and replace the fill plug, start the car and run for another 3 minutes (making sure the temp is still under 40oC). The manual then asks for a 3rd "spill and fill" just like above. I also did that and so had put 13l in by now.  This time they want you to keep the engine running and run the transmission through R and D (I hope the wheels are still off the ground!) for a while, and allow the trans temp to get to 40oC, then engine off. Finally, back under the car and undo the fill plug to let the overfill drain out; it will stop running when fluid is at the top of the levelling tube. According to the factory, that is job done! Post that, I reconnected the fill fitting and pumped in an extra 0.5l. AMS says 1.5l overfill is safe, but I started with less to see how it goes, I will add another 1.0 litres later if I'm still not happy with the hot shifts.
    • OK, so regardless of whether you did Step 1 - Spill Step 2 - Trans pan removal Step 3 - TCM removal we are on to the clean and refill. First, have a good look at the oil pan. While you might see dirty oil and some carbony build up (I did), what you don't want to see is any metal particles on the magnets, or sparkles in the oil (thankfully not). Give it all a good clean, particularly the magnets, and put the new gasket on if you have one (or, just cross your fingers) Replacement of the Valve body (if you removed it) is the "reverse of assembly". Thread the electrical socket back up through the trans case, hold the valve body up and put in the bolts you removed, with the correct lengths in the correct locations Torque for the bolts in 8Nm only so I hope you have that torque wrench handy (it feels really loose). Plug the output speed sensor back in and clip the wiring into the 2 clips, replace the spring clip on the TCM socket and plug it back into the car loom. For the pan, the workshop manual states the following order: Again, the torque is 8Nm only.
    • One other thing to mention from my car before we reassemble and refill. Per that earlier diagram,   There should be 2x B length (40mm) and 6x C length (54mm). So I had incorrectly removed one extra bolt, which I assume was 40mm, but even so I have 4x B and 5x C.  Either, the factory made an assembly error (very unlikely), or someone had been in there before me. I vote for the latter because the TCM part number doesn't match my build date, I suspect the TCM was changed under warranty. This indeed led to much unbolting, rebolting, checking, measuring and swearing under the car.... In the end I left out 1x B bolt and put in a 54mm M6 bolt I already had to make sure it was all correct
    • A couple of notes about the TCM. Firstly, it is integrated into the valve body. If you need to replace the TCM for any reason you are following the procedure above The seppos say these fail all the time. I haven't seen or heard of one on here or locally, but that doesn't mean it can't happen. Finally, Ecutek are now offering tuning for the 7 speed TCM. It is basically like ECU tuning in that you have to buy a license for the computer, and then known parameters can be reset. This is all very new and at the moment they are focussing on more aggressive gear holding in sports or sports+ mode, 2 gear launches for drag racing etc. It doesn't seem to affect shift speed like you can on some transmissions. Importantly for me, by having controllable shift points you can now raise the shift point as well as the ECU rev limit, together allowing it to rev a little higher when that is useful. In manual mode, my car shifts up automatically regardless of what I do which is good (because I don't have to worry about it) but bad (because I can't choose to rev a little higher when convenient).  TCMs can only be tuned from late 2016 onwards, and mine is apparently not one of those although the car build date was August 2016 (presumably a batch of ADM cars were done together, so this will probably be the situation for most ADM cars). No idea about JDM cars, and I'm looking into importing a later model valve body I can swap in. This is the top of my TCM A couple of numbers but no part number. Amayama can't find my specific car but it does say the following for Asia-RHD (interestingly, all out of stock....): So it looks like programable TCM are probably post September 2018 for "Asia RHD". When I read my part number out from Ecutek it was 31705-75X6D which did not match Amayama for my build date (Aug-2016)
×
×
  • Create New...