Engine knocking

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
DanDrath
Posts: 1393
Joined: Sun May 10, 2009 8:19 am
Car: 1990 Nissan 300ZX 2+2 TT
Location: Long Island, New York
Contact:

Post

I dont know how to diagnosis what kind of knock it is but i know its something with a piston on the drivers side. Its making a horrible loud sound and when i rev its even louder and starts backfiring from the cylinder and injector Is she dead? Please help me i need to fix this very soon or im f***ed with school..


User avatar
NolimitZ32
Posts: 7042
Joined: Fri Jun 27, 2008 9:07 am
Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

Post

can you tell if its detonation or is it a physical metal on metal bang bang? sorry ho hear man.

DanDrath
Posts: 1393
Joined: Sun May 10, 2009 8:19 am
Car: 1990 Nissan 300ZX 2+2 TT
Location: Long Island, New York
Contact:

Post

I think its a blown head gasket cuz i have exhaust coming out of the cylinder and oil mixed in with my radiator . How long do you guys give her till she dies im driving it as little as possilbe but have like a 5 miles trip to school every day ive been shifting at 2k its killing me. IOnly good thing is now i am twin turbo swapping her

User avatar
NolimitZ32
Posts: 7042
Joined: Fri Jun 27, 2008 9:07 am
Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

Post

I would park it if I were you, its impossible to tell when it will give out but likely it will leave you stranded and you'll have to pay for a tow, thats taking money out of the TT swap fund so park it if you can man. and I'm really sorry to hear that but hey at least now your gonna get Forced Induction.

DanDrath
Posts: 1393
Joined: Sun May 10, 2009 8:19 am
Car: 1990 Nissan 300ZX 2+2 TT
Location: Long Island, New York
Contact:

Post

Im just praying because i need it to get to school. So every morning i will just hope she starts.Hopefully i can order my clip this week. I would love to have my car up and running again by December.

User avatar
NissanFairladyZ32
Posts: 2137
Joined: Sun Aug 31, 2008 2:58 pm
Car: 91, Twin Turbo, 99 Miata 1.8L
Location: Allen, TX

Post

2+2 TT = JDM YO

User avatar
Pieceofsand
Posts: 1895
Joined: Thu Dec 25, 2008 8:07 pm
Car: 91 300zx Twin Turbo

Post

i've had similar problem before my blew my TT engine. yeah the less you drive it the better it will be obviously. are you getting any smoke out of your exhaust?

DanDrath
Posts: 1393
Joined: Sun May 10, 2009 8:19 am
Car: 1990 Nissan 300ZX 2+2 TT
Location: Long Island, New York
Contact:

Post

I will be jdm tyte yo lol, I was actually thinking of having it swapped to right hand drive since the clip has everything needed any opinions on this? No smoke yet but it just runs and sound like s*** and every time its in neutral it idles at like 100 rpm and sounds like its going to stall.

DanDrath
Posts: 1393
Joined: Sun May 10, 2009 8:19 am
Car: 1990 Nissan 300ZX 2+2 TT
Location: Long Island, New York
Contact:

Post

my oil is mixing with my coolant so im hoping i dont have to much water going in the oil because thats whats going to cause my engine to seize and blow.

User avatar
andrez
Posts: 183
Joined: Sat Sep 19, 2009 5:16 am
Car: 1990 300zx na / 1995 f-150 4x4 / 05 focus xr4 99 blazer s-10 jacked

Post

sounds like the intake side of the head gasket ....how are your mecch skills?

DanDrath
Posts: 1393
Joined: Sun May 10, 2009 8:19 am
Car: 1990 Nissan 300ZX 2+2 TT
Location: Long Island, New York
Contact:

Post

I would say beginner to intermediate im learning more as a i go and as i do things.

User avatar
andrez
Posts: 183
Joined: Sat Sep 19, 2009 5:16 am
Car: 1990 300zx na / 1995 f-150 4x4 / 05 focus xr4 99 blazer s-10 jacked

Post

dude water in the oil ....water has a grit to it so not only is the viscosity been broken down but you are whats called potato chipping the cylinders....not much time left on that engine...replace the head gasket soon....a good weekend should do it 50 bucks for a fel-pro gasket

DanDrath
Posts: 1393
Joined: Sun May 10, 2009 8:19 am
Car: 1990 Nissan 300ZX 2+2 TT
Location: Long Island, New York
Contact:

Post

Is it the signs of a head gasket i dont want to waste the time pulling the plenum for it to be something else. Also on the front of the drivers side halof od the plenum theres all blackish like carbon/exhaust. Another reason i think its the head gasket. t.y wherewould be the cheapest place to get the head gasket. I dont want ot spend to much more $ on this engine since my new one is coming in about a month or little longer

DanDrath
Posts: 1393
Joined: Sun May 10, 2009 8:19 am
Car: 1990 Nissan 300ZX 2+2 TT
Location: Long Island, New York
Contact:

Post

yay ordering from z1 for 29 bucks. aha

User avatar
andrez
Posts: 183
Joined: Sat Sep 19, 2009 5:16 am
Car: 1990 300zx na / 1995 f-150 4x4 / 05 focus xr4 99 blazer s-10 jacked

Post

while you are at it you may wanna pick up a foot of vacuum hose just in case my first plenum pull encountered some brittle hoses specially them fkn 3" pcs


Return to “300ZX (Z32) Technical”