ka is nocking.

[Riubens]

OK ,so heres the story,when I start to rev my car the engine nocks a little and then the noise goes away it only does it some times and then youwill not hear any nock noise coming from the engine. ok the only thing I did was changed from 10w/40 dino oil to 10w/30 mobil 1 not synthetic and I started using 89 octane gas I used to use 93 octane before this problem started.so do you guys think I may have a bent valve or what could cause my engine to nock in that way ??

btw I have a 95 obd 1 zenki do you guys think the head of a 91 240sx could bolt on to my 240sx .

and am going to change back to 10w/40 and 93cotane tomorow to see if the nock goes away..

any ideas guys??

[Riubens]

does anyone have an idea ?????????????

[supra brit]

Are you sure its knocking and not ticking/rattling? I know my SOHC's timing chain rattles like a bish for a few seconds after cold start, but it's normal until the oil is pumped to the head. I don't think DE's should do that though, but it still could one of the guides broke off or the tensioner is going bad.

And yes a 91 ka will work in a 95, but you prob have to use the s14 intake manifolds and some other things...not sure on that though...

[Riubens]

thanks bro ill look into that.

[i2ice4m3]

i had a knocking noise in my KA24e as well. it was a knocking/ rattling noise. My UD pulley wobbled a lot while it ran, too. When i pulled the oil pan off i discovered a beraing shiled all twisted, and lots of metal particles. Turns out the front bearing went out and the shield got chewed up

[oki_bum]

Lowering your octane can cause the knocking....i know that cuz my old Lancer GSR use to have bad knocking until i upped the octane.