156 jtd mystery noise
I've just about finished resurrecting a dead 2003 156 SW 2.4JTD. It had done 90k and had been laid in someones garden 2 years. I've done cambelt and tensioners, oil, oil filter, air filter, fuel filter,front top arms, arb links all 4 springs, rear shocks, rear arb links, handbrake cables all 4 discs and pads, gaitors, bits of trim. I got it MOT'd last week and am dead chuffed apart from a clutch thats slipping a bit and a noise i'm keen to get to the bottom of...
I've had 2 2.4's before and they have both made this noise... When you get past about 2900 revs (will check tomorrow) whilst accelerating hard, there is a sound best described as a "chatter". Once letting off the accelerator it goes away i.e. at in 5th at 3000 rev's coasting along at a very good speed with the window down listening there is no sound. Also no other nasty noises with this engine, no rattles at tickover, or knocks of big ends/mains/dmfs etc.
I'm thinking it must be either: Turbo wastegate (do these have them?)/egr valve/crankshaft damper pulley/aircon pump(its not working).
Anyone else had a chatter at 3000rpm ish on hard acceleration? Or is this a charactertistic noise on these? All 3 i've owned have done it and done it for 40K plus on the last two. Final thing, you can't hear it with windows up.