98 mxz 440 f/c primary - Snowmobile Forum: Your #1 Snowmobile Forum

dhridenh · 11-15-2012, 05:40 PM

ok so i got a 440 f/c ski doo here and it has a clunking noise going on under the hood i removed the clutch and took it apart cleaned it out i had one arm inside that was sticking so i cleaned that up and it moved great the spring looked good as well so i put it together put it back on and i still have a clunking noise under the hood when u get on the gas now could it be caused by a bad engine mount bushing or jack shaft or bearing when i had it apart it did not make a noise or move about on the crank i just am lost on this one any one else have this problem let me no thanks all

**smallengineguy** · 11-16-2012, 03:57 AM

Dude, you gotta use more periods... Open the hood and put the brake on. Give it throttle and see if the engine twists or lifts at all. It should have very little movement. The primary could also be sticking.

dhridenh · 11-16-2012, 11:00 AM

ok. so i put the park brake on and reved the engine. the first thing a saw was movement from the engine and then i looked and found that the adjuster from the engine to the chassis was mostly gone there was no connection between the 2. would this cause clunking under the hood i think so its mostly as low speed and getting going.
at high speed it seems to go away what to u all think.

davidnnoah · 11-16-2012, 01:28 PM

I'm thinking the adjuster you're talking about is the engine torque rod. Most torque rods are adjusted so they just touch the engine while not running. This stops the engine from shifting during acceleration and other loads.
You may wish to check clutch alignment, then square away your torque rod, then see if it still clunks.

dhridenh · 11-16-2012, 03:31 PM

ok

**smallengineguy** · 11-16-2012, 06:35 PM

X2 on the torque rod. If the engine moves too much, it will set your clutch alignment WAY off.