silent shaft?

pajeroboy · Post by **pajeroboy** » Tue Jan 02, 2007 11:07 am

hey all,just had to do my waterpump on my 91 pajero,noticed when i removed the timing belt cover that there is a second belt system in there,after doing some homework and digging round to find out what it is i found that it the silent shaft belt.

heres the question what does the silent shaft do? and what would happen if it wasnt there? because the belt was broken.

any help would be nice

NJV6 · Post by **NJV6** » Tue Jan 02, 2007 11:22 am

Diesel or Petrol?

matwelli · Post by **matwelli** » Tue Jan 02, 2007 11:26 am

silent shaft or ballance shaft ? - mitzys run a balance shaft to dampen engine vibration on their 4-cylinders

pajeroboy · Post by **pajeroboy** » Tue Jan 02, 2007 11:32 am

mighty 4d56 diesel powerhouse, i had a feeling it mite be something to do with keeping it quiter and less vibration,is it ganna be a prob not having one?

NJV6 · Post by **NJV6** » Tue Jan 02, 2007 11:33 am

I suspect it will be the balancer shaft and a 2.5 turbo Diesel. I don't know what they run like without one - ie how smooth but if it has broken and not done any damage - wow! I have just got one and the cam belt picked it up and broke the rocker gear.....

I'd replace it or at least remove the broken belt if you haven't already.....

pajeroboy · Post by **pajeroboy** » Tue Jan 02, 2007 11:37 am

yeah i pulled the broken belt out,seam so run fine,havent got a clue how long it been broken for,cam belt was done bout 20000 k ago,from looks of pulleys they havent been used for some time.never really had a prob

De-Ranged · Post by **De-Ranged** » Tue Jan 02, 2007 1:56 pm

I killed the top end on my motor when the balancer/silenticer shaft cam belt broke I was at full revs doing a soft shingle crossing :roll:

....I'm guessing it put it out of balance enough that the cam belt slipped a couple of teeth bottoming out 2 valves which shattered the rocker arms and just on feel bent two other valves..... I decided to bin the motor ... its the white wanker in my avitar

Be carefull if you decide to run it with out :wink:

Oh and I did a bit of asking round as mine was 40k into a new cam belt... :evil:

seems some of the car yards will do the cam belt to help sales.... problem is they do only the cam belt :shock:

if I had enough prof I'd name them, but either way I'll never buy from them :lol:

Cheers Reece

matwelli · Post by **matwelli** » Tue Jan 02, 2007 2:06 pm

My wifes truck is due for the cam belt in about 10K or so, and I am planning on doing both belts (cam and balance), have to take most of the crap off the front to get to the cam belt so may as well do both and save any probs later on

pajeroboy · Post by **pajeroboy** » Tue Jan 02, 2007 2:08 pm

yeah it a bit of a pain to do,hardest part 4 me was getting the man pulley off,lots of muscle power and swearing and cursing.

NJV6 · Post by **NJV6** » Tue Jan 02, 2007 9:11 pm

pajeroboy wrote:yeah it a bit of a pain to do,hardest part 4 me was getting the man pulley off,lots of muscle power and swearing and cursing.

To undo the bolt - got a really long bar and held onto it then got someone to give the starter a quick flick... worked a treat.

Then the pully without pully pullers... - got 2 long bolts with the same thread as the holes in the middle of the main pully that the other pully bolts to and threaded them in half a turn at a time, the pully came off nice and gently.