Thread: New Cylinder Head

Originally Posted by BathurstTom

With the chirp, try pouring a little water on the inside of the belt as it is running. If it quiets it down - replace the belt or use some rubber conditioner on it.

Is the noise coming from the Injector pump? If so, check the lift pump. About to do mine - it doesn't have the odd thump noise, but it sounds like a tappet and is spilling some deisel over the front diff etc.

I have read other reports on the web where people attributed a thump noise to the lift pump - the noise is from the injector pump because it is starving for fuel. Is your motor down a little performance (especially uphill) and won't rev past 3k?


Tom

pretty sure thump coming from the water pump area. lift pump is pretty new, changed it when i had the timing belt done.the vacuum pump is still the same one from when i bought the car but seems quiet and screwdriver stethoscope trick you cant hear the thump in the pump. the injector pump is about 1 year old too. havent been revving it past 3k anyway as the works are just new, wanted to test everything and break it in gentle until i knew all worled. but yea when you go to higher revs it is a bit shaky and loud with no bang. thing i thought about last night though is when i first went for test drive after completed, ran smooth as silk and felt more powerful and very quickly started running rough after a few drives, and shaky and the belts making noise etc. once ive checked everything i need to im going to limp it to rovertech anyway and get them to do carbon test and few other checks anywya for peace of mind. has been a good experience but at the end of the day nothing beats a professional opinion face to face with the car instead of me trying to pin point stuff. guess thats difference between weekend mechanic and someone who does this as a living.

currently 1 million degrees in perth so need to wait a few days before i look at it. going to run it without the belt again and see if the thump is still there. i need to also find the source of the leak before i do any proper testing. if the new expansion tank is split ill have to put old one on for now. hopefully just cap like Newt says. going to try old cap as well as i know it worked. theres a far bit of water down radiator so hopefully it wasnt this that leaked. barely lasted 3 working hours if it's this.

tinkered around again today. topped up cooling system again, put my old expansion tank cap back on. whilst playing around with the heater hoses i noticed one was moving around easily. turns out the one going to top of head was loose as and almost pulled it of by hand accidentally. i tightened it up now.

would this cause anything to be sucked into the system and pressurise it? there was a little bit of coolant around but barely anything. just wondering if this may have cause previous problem. the old expansion tank seems to be working better too. i took her for a run warmed it up proper, after i got back you could hear the pressure coming out of the cap. the new one didnt do that now that i recall.

ive attached a video of the expansion tank right after i filled the car and was still cold. water moving round, some little bubbles. im assuming this look all normal? water is meant to be circulating through this all the time, not just hot?

going to be driving it to work again just short trips and keep an eye on it. still dont know where the coolant came out from last time. still not comfortable relying on her.