Results 1 to 19 of 19
  1. #1
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,782
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    Rides
    1

    Default Water pump replacement.

    Just wandering if it was possible to swap out the water pump without removing the timing\balancer belts?

    Just started the car up (treated it to a new battery) and something under the bonnet has some very very grumbly bearings. I've got a new pump so was wandering if anyone had swapped it.

    I've got the feeling the belts need to come off though.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  2. #2
    Join Date
    Jun 2006
    Location
    London
    Posts
    2,677
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    Quote Originally Posted by Steve Webb View Post
    Just wandering if it was possible to swap out the water pump without removing the timingbalancer belts?

    Just started the car up (treated it to a new battery) and something under the bonnet has some very very grumbly bearings. I've got a new pump so was wandering if anyone had swapped it.

    I've got the feeling the belts need to come off though.
    Pretty sure it can be done with the cambelt in place. Balance belt would probably need to come off though.

  3. #3
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,782
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    Rides
    1

    Default

    Whats the general consensus on running without the balance belt these days?

    Don't use the car enough to be worried about the extra vibration, but can the belt just come off or do the shafts need to be pegged/full on removal kit?
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  4. #4
    Join Date
    Jun 2006
    Location
    London
    Posts
    2,677
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    I have run mine like this for about 1500 miles now and have just got used to the extra vibration. Less worry, less cost.
    I did lock the front one though as it would spin with the cambelt turning the whole bearing.

  5. #5
    Join Date
    Feb 2012
    Location
    Hinckley, Leicestershire
    Posts
    237
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    I think you can replace water pump without moving the belts.

    I've been running the 156 sportwagon without balance belt and don't really notice anything from it missing.
    So will be removing the balance belt on the 16vt engine but will be removing them or locking them
    Alfa 155 Q4 skinny
    Alfa 155 2.0 8v skinny rolling shell being cut up to repair the Q4
    Alfa 155 black wb coupe 20vt engine STAYING NOW
    Alfa 155 White widey soon to be 20vt
    Alfa 155 2.5 v6 white skinny NEXT FOR SALE





    Will build alfa 155 or 145 into 20vt or 16vt or diesel's or selepeed's pm me

  6. #6
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,782
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    Rides
    1

    Default

    Quote Originally Posted by AlfaJack View Post
    I did lock the front one though as it would spin with the cambelt turning the whole bearing.
    I remember you posting up what you used to lock the front shaft, but I can't for the life of me find it now. Do you remember where you put it.

    Looking down at the balance belt pulley on the crank and there seems to be quite a bit of surface rust between the teeth, so it looks like the water pump has been leaking onto it.
    Lends weight to my theory that the water pump is making all the noise.
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  7. #7
    Join Date
    Jun 2006
    Location
    London
    Posts
    2,677
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

  8. #8
    Join Date
    Jun 2006
    Location
    London
    Posts
    2,677
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

  9. #9
    Join Date
    Feb 2011
    Location
    Surrey
    Posts
    119
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    Whats the advantage of removing the belts? The balancing shafts must have been there for a reason. As Jack says in the other thread its not the most refined driving engine in the world to begin with, i wouldn't want it feeling any 'rougher' unless i was gaining some good hp or reliability.

  10. #10
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,782
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    Rides
    1

    Default

    Cheers, do they just provide a little friction against the balance shaft or is there a flat part of the shaft?
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  11. #11
    Join Date
    Feb 2007
    Posts
    622
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    Quote Originally Posted by Steve Webb View Post
    Just wandering if it was possible to swap out the water pump without removing the timingbalancer belts?
    In one word: No!

  12. #12
    Join Date
    Jun 2006
    Location
    London
    Posts
    2,677
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    Quote Originally Posted by Steve Webb View Post
    Cheers, do they just provide a little friction against the balance shaft or is there a flat part of the shaft?
    Yes, I think it just secures them with a little friction.
    When tightening the bolt for the pulley make sure the pulley doesn't turn or it will chew up the plate and you have to start again.

  13. #13
    Join Date
    Jun 2006
    Location
    London
    Posts
    2,677
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    Quote Originally Posted by Alfa Patch View Post
    Whats the advantage of removing the belts? The balancing shafts must have been there for a reason.
    You will find the car free wheels better as there is less to turn on the engine. It seems to pickup a little nicer too.

  14. #14
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,782
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    Rides
    1

    Default

    Quote Originally Posted by Alfa Patch View Post
    Whats the advantage of removing the belts? The balancing shafts must have been there for a reason. As Jack says in the other thread its not the most refined driving engine in the world to begin with, i wouldn't want it feeling any 'rougher' unless i was gaining some good hp or reliability.
    The shafts are there to smooth out some of the vibrations, however in a reasonably balanced motor there shouldn't be much to smooth out.

    The benefits of removing the belt\shafts is that there is less rotating mass in the engine so less power lost and a little bit more going to the transmission.

    However one of the major benefits is the lack of 1 set of idler bearings and belt. Which have been known to fail and take out the timing belt, resulting in a big mess.

    I don't do enough miles in the car to be worried about harshness, so I think I'll be taking the balance belt off.
    I think at the same time I'll also be swapping over the inlet manifold, and removing the aircon pump.

    What on earth could go wrong?
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  15. #15
    Join Date
    Feb 2007
    Posts
    622
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    Quote Originally Posted by Steve Webb View Post
    The shafts are there to smooth out some of the vibrations, however in a reasonably balanced motor there shouldn't be much to smooth out.

    The benefits of removing the beltshafts is that there is less rotating mass in the engine so less power lost and a little bit more going to the transmission.

    However one of the major benefits is the lack of 1 set of idler bearings and belt. Which have been known to fail and take out the timing belt, resulting in a big mess.
    + Increase in oil pressure, probably the most important point of replacing the BS shafts.

  16. #16
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,782
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    Rides
    1

    Default

    Quote Originally Posted by Evodelta View Post
    + Increase in oil pressure, probably the most important point of replacing the BS shafts.
    Yep, but you won't get an increase if you just remove the belt and prevent the front shaft from rotating, will you?
    Last edited by Steve Webb; 10-09-12 at 21:49. Reason: Crap spelling
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  17. #17
    Join Date
    Feb 2007
    Posts
    622
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    No you certainly won't.

  18. #18
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,782
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    Rides
    1

    Default

    But will removing the belt and parking the shafts reduce pressure at all?
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  19. #19
    Join Date
    Jun 2006
    Location
    London
    Posts
    2,677
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Rides
    1

    Default

    Mine hasn't changed - still low as normal! I guess the outlet for the shaft is always under the same resistance.

Similar Threads

  1. Water pump
    By pitucas in forum Individuals classified.
    Replies: 8
    Last Post: 25-10-09, 23:45
  2. Water Pump
    By wrinx in forum Individuals classified.
    Replies: 14
    Last Post: 02-02-09, 22:43
  3. Charge cooling with water
    By Evodelta in forum Alfa Romeo Q4 Tech.
    Replies: 4
    Last Post: 05-10-08, 18:07
  4. Water Pump
    By wrinx in forum Alfa Romeo Q4 Tech.
    Replies: 15
    Last Post: 20-07-08, 22:37
  5. water pump
    By sub555 in forum Alfa Romeo Q4 Tech.
    Replies: 8
    Last Post: 12-01-07, 20:22

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •