Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: BazaJT on 23 March 2016, 21:58:35

Title: Are they necessary?
Post by: BazaJT on 23 March 2016, 21:58:35
So far I've spent a fair wedge of dosh buying the oil cooler+various washers seals and a timing belt kit and a few other bits like oil filter,oil etc.Now before I find someone to come and fit them for me I've been scanning Haynes manual in which it says when refitting coolant pump and power steering pump pulleys new bolts must be used,so are they another necessary item I need to have on hand for whoever does the job or can the old bolts in fact be re-used?
Title: Re: Are they necessary?
Post by: Nick W on 23 March 2016, 22:09:06
Quote from: BazaJT on 23 March 2016, 21:58:35
So far I've spent a fair wedge of dosh buying the oil cooler+various washers seals and a timing belt kit and a few other bits like oil filter,oil etc.Now before I find someone to come and fit them for me I've been scanning Haynes manual in which it says when refitting coolant pump and power steering pump pulleys new bolts must be used,so are they another necessary item I need to have on hand for whoever does the job or can the old bolts in fact be re-used?


I wouldn't worry about it. The only reasons to replace them are because they're damaged or if a new waterpump, shorter ones are required. The same applies to the 6 bolts holding the outer pulley to the crank.
Title: Re: Are they necessary?
Post by: Andy H on 23 March 2016, 22:21:27
A lot of the bolts are intended to be tightened to a torque and then angle tightened to stretch the bolts beyond their elastic limit.

If you re-use bolts repeatedly and angle tighten them each time then they will be weakened each time they are stretched.

Most people probably just tighten them to a torque and then stop.
Title: Re: Are they necessary?
Post by: minifreek on 24 March 2016, 10:05:28
Only bolts that really need to be new each time, are the headbolts....
Title: Re: Are they necessary?
Post by: Nick W on 24 March 2016, 10:10:39
Quote from: minifreek on 24 March 2016, 10:05:28
Only bolts that really need to be new each time, are the headbolts....

You could make a very good case for the big-end and flywheel bolts as well.
But the basic M6 bolts on the pulleys? Unlikely to be necessary.
Title: Re: Are they necessary?
Post by: Bojan on 24 March 2016, 10:17:54
Quote from: minifreek on 24 March 2016, 10:05:28
Only bolts that really need to be new each time, are the headbolts....

con-rod bolts too!
Title: Re: Are they necessary?
Post by: Kevin Wood on 24 March 2016, 10:18:10
The most likely reason that they specify new bolts is that they are pre-coated with a locking compound, IMHO.

Always use locking compound on the water pump pulley bolts and don't overtighten them. I've recent experience of them coming undone. ::)