Right, 1st post

I have a 90 300zx biturbo auto :( i kno, automatic

 

Driving it the other day, all was fine. slowly i started to hear a clicky noise from the engine, so i thought o god, better head home. On way home, clicky noise got louder and a nasty grinding sound occurs when in D and accelerating.

 

Nearly home i have hardly any power and lots of smoke from engine bay and under car. Open bonnet, no water or anything, so i pull out the engine dip stick and smoke/steam coming from the tube and the oil is a nasty black colour. I go to clean the dipstick and the oil is so hot i got burnt through lots of paper towels. 5 mins later i touch the oil cooler to see if hot, but it's bone cold.

 

Next day, get in car, start it, runs fine......... for 3 mins, then the clicky noise started again. I towed it to my garage.

 

Bought some forte engine flush as i thought may be an oil block. Warmed car for 10 mins, added the flush, 2500rpm for 15 mins then drained it. When that sump plug came off, thick smoke everywhere and the oil was so hot it melted the bucket, not good. So off came the oil filter.

 

I disconnected the oil cooler, used an air gun n blasted it, no blocks there. But the left pipe (if looking at engine bay from front of car) seems to be blocked, 150psi of air cant go through, right one is fine tho.

 

This is as far as i can get, im stuck

 

 

 

 

Please help, i love my zx!

sounds like you have cooked the engine, is the rattle present at any RPM? or above 3k RPM?

 

oil cooler will be cool as thats what it is a cooler the hoses may be warm though.

 

oil burnt the bucket? jeez idealy you should of stopped the car as soon as you thought there was a problem, you have probably cooked the heads, and as you have carried on the engine temp has got so high its cooked, remove coilpacks if you can, id expect there melted in to the heads, seen that a few times

sounds like you have cooked the engine, is the rattle present at any RPM? or above 3k RPM?

 

oil cooler will be cool as thats what it is a cooler the hoses may be warm though.

 

oil burnt the bucket? jeez idealy you should of stopped the car as soon as you thought there was a problem, you have probably cooked the heads, and as you have carried on the engine temp has got so high its cooked, remove coilpacks if you can, id expect there melted in to the heads, seen that a few times

 

Well the oil pressure is still normal, and as soon as the power started to go i did stop immediatly. I think the engine is salvageable. Just need to find why the oil over heated. the coilpacks are fine. Any ideas why the over heat?

 

BTW the engine does not over heat

Sorry cant comment about the rattle, as i cant remember lol

overheat, did you say there was no water in the rad in your first post/ that would explain that if so, normally when the heads cook it can do a lifter in! hence the rattle

 

with the lack of coolant circulating its no surprise the oil was raging hot bud

sorry meant there is no water leaks. Coolant seems fine. Why would the coolant cause the oil to overheat?

sorry meant there is no water leaks. Coolant seems fine. Why would the coolant cause the oil to overheat?

 

with no water in an engine what cools the engine down? ;)

 

on a seperate note, you said in d and accelerating the car was making grinding noises and loosing power? not a good thing with so much heat im not surprised if the bearings have not welded to the crank. or worse

 

best thing is to have it looked at by someone who knows, its pointless guessing to what the problem may be without testing/listening ;)

yea i suppose, i hate garage prices lol.

But can you explain to me what would cause me not being able to blow air into that pipe that i said n my 1st post. is there some sort of one way valve or somthing.

yea i suppose, i hate garage prices lol.

But can you explain to me what would cause me not being able to blow air into that pipe that i said n my 1st post. is there some sort of one way valve or somthing.

at the oil filter tree there is a one way valve hence why no pressure will pass, i doubt it would be a clogged line, remove the line its not to difficult then check

Your a star mate, this is what the internet's for, not porn. Well, on some nights hahahaha, playing.

 

Seriously, thanks a lot

Your a star mate, this is what the internet's for, not porn. Well, on some nights hahahaha, playing.

 

Seriously, thanks a lot

 

you sure, it was invented for me! cant beat a bit porn ;)

MMM nice !!!! i'm hearing cooked vavle stems,warped con rod bearing the whole she bang :(. Did the head gasket blow??? if so could be that it got overheated and dropped a piston hence the rattle... Only a guess though without hearing or checking myself mate.