blown motor?

For the RWD SR20DET cars! Sponsored by Wiring Specialties.
cdoyle360
Posts: 39
Joined: Tue Aug 11, 2009 7:03 am

Post

ok my friend was running around 15 pounds on a stock t25 with stock side mount, 255 fp, pretty much stock sr20det... ok will we was doing a pull just messing around and he was in the top of 4th and then white smoke comes pooring out of the bottom of the car. He told me the car shut off as soon as it happen. we pop the hood and there's oil everywhere , the dip stick got blown almost all the way out, but there wasn't any signs where oil could come from besides that.. we turned over a couple times and it sounded like there was no compression... we pulled the plugs... cylinder 1 look like detonation.. the spark plug was not black at all and the tip of it was kinda chiped/scrached off. cylinder 2 3 4 was full of oil.. which is not good... we need some of ur opinions.. we think that it might have jumped timing and when that happen the cam shaft sensor would make the engine cut off.. but how would the cylinders have oil in them?

It sill turns over fine with no knocks we can here.the boost was cranked up but it should be know where near breaking internal wise.Cylinder 1 could have detnat when all the vavles where closed and when that happend it had no where to let the pressure out so it blew off the dip stick and runind the rings in the other cylinders..

Theres a couple more things.. we just wanna make sure we have a good start so we can figure out what went wrong.. well no f***ing flamming for those that wanna be faggits

scroll down and check pics.. :D
Modified by cdoyle360 at 9:38 PM 3/21/2010


User avatar
Sleeper_RMS13
Posts: 49
Joined: Sun Oct 25, 2009 12:21 am
Car: 91 FB W/Blacktop SR

Post

15 psi on a stock t25 was not smart at all. You maxed our your fuel and leaned out. Your gonna at least need new rings, hg, machine work and a new turbo.

User avatar
Beems240sx
Posts: 457
Joined: Mon May 19, 2008 5:16 pm
Car: built S14, E30, R6 raven

Post

i have run 15 psi on my t25 for over a year with no issues. stock fuel pump still, but i have a wideband which helps A LOT. something else went wrong here.

User avatar
Justin35ll
Posts: 1421
Joined: Fri Oct 17, 2008 6:57 pm
Car: s13 coupe sr20det

Post

i have also ran 14 psi with no problems

User avatar
Hijacker
Posts: 14373
Joined: Wed Aug 13, 2003 4:57 am
Car: '92 240sx Convertible
'94 F-150
Location: Fredericksburg, VA

Post

I bet you all have an upgraded intercooler though.

The stock side mount is notorious for heat soaking past 12 psi.

OP, have your friend yank the motor and tear it down. It's really the only way to know if he screwed the pooch. But from the sounds of it, he caused a melt down.

cdoyle360
Posts: 39
Joined: Tue Aug 11, 2009 7:03 am

Post

yea i told him it wasn't smart either lol stock side mount all that air got hot..but where gonna tear it down today.. ill get back and see what we find

cdoyle360
Posts: 39
Joined: Tue Aug 11, 2009 7:03 am

Post

Ohh.. my god.. check this s*** out lol first thing we did today was take off the vavle cover and check the timing... it was perfect... next step was compression test... this is where it got bad... cylinder 1 30 psi cyl 2 0 psi cyl 3 30 psi cyl 4 0psi.. lol wtf??? rings are gone.. so we tear down to see how bad it is.. and what went wrong .

so we found out that cylinders 1 an 3 leannnnned out hard .. so yea there we go


User avatar
s13-t
Posts: 419
Joined: Wed Jun 18, 2008 6:07 pm
Car: s13 pig nose w/blacktop sr20det

Post

static/icons.html#

didnt you also post this on the 240sx/silvia board?

User avatar
USMCgetsome
Posts: 2030
Joined: Wed Apr 14, 2004 7:38 pm
Car: OWN S13.5 RB25DET/2003 G35
Contact:

Post

sorry for your loss. Although the lesson learned was you need some supporting mods when you start uping the boost

User avatar
OM3GA
Posts: 3041
Joined: Fri Apr 14, 2006 11:41 pm
Car: A Sexy Mobile, 1993 Nissan 240sx 180sx Hatcher

Post

I also saw this in the 240/silvia section lol rad

User avatar
drftsx
Posts: 414
Joined: Wed Jan 04, 2006 1:47 am
Car: 90 240sx(sr)

Post

Man your friend surely screwed up your motor. Theres so many threads about friends messing up peoples cars, its insane.


Return to “SR20DET Forum (rear-drive)”