So of course when your remove and replace so much there is a chance that some issues will accrue. So start and runs real nice! In fact better than ever. But when you go for a drive, if you squeeze the throttle any more than you foot just touching the throttle. It makes a metallic rattly sound. However if you stop to have a look and give her some revs, you get nothing but awesome revs with no noises! what is this? Plus my Aux fan is always on??? I didn't touch anything to do with this! Why?
Fan on all the time is more than likely the temp sensor terminal off - corroded - dodgy wires or a bad sensor. Rattle noise could be any thing but be sure to check the crank bolt and especially the timing belt tensioner for correct setting and the timing belt idler pulley bearings and make sure you used new pulley bolts. Cheers Dave
Detonation? The light rattle at light throttle sounds like pinging or detonation. The ignition timing at those light throttle moments is quite high. About 45 degree's. As to why you dont get it when you pop the hood and have a look, well, the engine is not under any load, and hence no pinging. It may not be that. But if sounds like deep rattling coins, sounds like pinging. What did you do in your 120K service?
I did everything! And followed all the directions in a number of write ups. So new everything. Mark it does make the sound past the light throttle, it's usually on very feather light throttle when you won't get it My temp sensor is reading as usuall.
Yes, CAS and turn clock wise a bit to retard the spark a bit. Now the Cam sprocket is in the correct place the timing would be advanced from the old position.
Yeah I think your right! It was out a tooth! I have a DET sensor bypass in so I might take that out to see if it helps for now as I have work in the morning
If the AUX fan is on sometimes there may be an issue with the wiring or corrosion to the coolant temp sensor. When it next comes on wiggle the wiring around the coolant temp sensor to see if it'll go off. Even if the wiring or sensor is failing it can still give a reading on ECUtalk at times. The ECU depends on the coolant temp sensor for air fuel mixture to be right. If this dependant is off then it could be also fuelling your detonation that you may be experiencing. Also check the timing when a timing light. There is no other alternative way to getting it stock! Congrats on building the courage to do major maintenance like this!
Ok so pulled my DET bypass this morning and success! No more knocks. So with that I tried to sort out the mystery Aux fan issue. I checked out the temp sensor which is only say 6 months old, but it seems ok (clean) and free of corrosion...the plug is just as old too. I checked the water level in the radiator and there you have it the water level is not up the top! I must of forgotten to re-fill this in my rushing about (mind you I didn't empty the radiator completely). So thought that was my issue, alas it wasnt I ran out of time this morning and I had to drive to work. On the way I notice my temp was up at 120! I pulled up and had a look, no leaks/steam or hissing. I thought this was strange and felt the top rad hose, it was up to pressure. I knew the radiator was full and free of air. I was near work so I set off again keeping a close eye on the temps. My dash temp was up and my ECUTalk was up on the 120 range. Strangely the temp dropped rapidly all of a sudden, then climbed. It wasnt up at the high temps and gradually increased. It was all over the place but preferred up around 117-120. All this time, the Aux fan is still on. Is that on because of a faulty temp sensor even if its not raising an error code? Or is it causing this temp spike because its on draining power and causing spikes? Just a thought also, I have the UR pulley in... This isn't whats causing these odd temps is it? I apologise for grammar and spelling, I wrote this out on my phone
Gotta love auto correct on phones Have you retarded the timing a little ? Advanced timing can cause higher temps. When you did the service did you replace the thermostat ? Sudden drop in temps for no reason is a possible sticking thermostat. A sticking thermostat will KILL a motor very quickly. Also look at the outside temps you guys have been having lately. That does not help.
aux fan cuts in on mine just over 95deg. you may still have an air lock let it cool right down and recheck radiator not the bottle, silly question but this does happen, did put the thermostat in facing the right way.
All I did this morning was took out my DET bypass so that the DET sensor fault code will retard my timing for me....for now. I replaced the Thermostat as a part of the service...its facing the correct was and the arrow is pointing up. I've been reading up on the UR Crank pulley....is it true ill also need a overdrive water pump pulley? or does it not explain the fact the temps are erratic?
Success! Basically what happened this morning is my incompetence in filling a radiator up! Lol there were still air locks in there causing the water to drop below the sensors and every now and then I guess pass by them which resulted in the crazy temp fluctuations. So once it was up to temp (well, passed operating temp) I fill it back up. The thermostat was now open, compared to this morning and the engine/rad was able to expel the air for the system. The Aux fan was on because it was thinking the engine it damn hot and was trying to aud the cooling. So now that it's all proper, the aux fan is off. Temps are reading as normal now. No more knocking has occurred since setting the knock sensor error on retarding the timing as a temp fix. I will get it all timed up with a light soon. My guess is due to the shockingly banged out crank sprocket the timing had be slowing been retarding, so the previous owner adjusted the CAS to compensate. Then since putting a new crank sprocket in, the timing has advanced too far causing the ping. No leaks or anything so far.
Thanks Adam, just some teething issues I suppose. I will be keeping an eagle eye on the front of that engine for a while! It always takes me a week or two after something major like that for me to get my confidence back in the Z haha
Congrats on the fix-up. Surprising how much trouble such a small piece of metal (woodruff key) can cause. If the key had completely sheared in half the motor would have been totalled and a major expense. Dodged a real bullet there eh?
Yeah I tell you what! Did you see the photo of the woodruff key I my other thread? You can see how the Tourque over the many years has made a perfectly square step!
