knocking noise

81_TE_gem · newbie Joined: 07 Apr 2003 Posts: 7

alrite, i gotta knocking noise coming from the front of my engine and i don't know what it is. It only happens once the engine warms up and i'm accellerating and when i ease off it stops. Any ideas what it could be?

Soop · backyard mechanic Joined: 30 May 2002 Posts: 748

Timing chain rattle maybe ?

If the guides are fucked it knocks really loud and the engine sounds like a truck.

IDAREU2 · tinkerer Joined: 07 Oct 2001 Posts: 423

Could be you big end or conrod bearings aswell but then again should do it all the time or might just do it when the oil thins out..

also could be a gudgen pin knock thats the pin that hold your piston to the con rod..

cheers

ExGem · tinkerer Joined: 10 Feb 2003 Posts: 110

Sounds like a big end to me. Time to save for a new motor, drive it very carefully and make sure it's topped with oil.

DOHC_TF · tinkerer Joined: 11 Feb 2003 Posts: 123

Probably Big End bearings. Had a commodore that knocked when i accelerated and it turned out to be the big end. If it was a Gudgeon Pin it would do it all the time.

Cheers

Frederick Stienheld · petrol head Joined: 05 Sep 2002 Posts: 2719

Is gudgeon noise common in G180s ? I have a gudgeon knock and my mechanic reakons its common for these engines? I reakon he's just too lazy to fix it!! heh

rob_w · tinkerer Joined: 19 Feb 2002 Posts: 395

it sounds like a big end.

i had the same symptoms with my g200...

you have 2 options, replace the motor...$300 will get you a decent secondhand g161,
or rebuild the old one. if you have a 1600, ditch it and replace. if its a rarer g180-g200, rebuild.

a crank grind requires rods resized, and all up,[excluding bearings, and if you do the labour], shouldnt cost more than $220. [mine cost $211.20].

bearings will cost up to $110 for a complete bottom end kit. [acl].

so its up to you.

hope this helps, and be prepared to get dirty,

rob.