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1.8 T Timing belt tensioner torque settings

20K views 4 replies 3 participants last post by  Rusty  
#1 ·
Just signed up here (though I've been "lurking") for a week or three. A great store of information.

I'm in the middle of doing the Timing belt on my 98 1.8T (UK spec AEB) & have got the new tensioner & belt installed

....and realised I can't find the torque settings for the following bolts:

1) The big one that holds the new big roller to the block
2) The 10mm bolt that holds the brass thing to the big roller
3) The Bolt that holds the small Auxilliary roller to the new tensioner

My Haynes manual says 20Nm/15 ft/lb for the two bolts that hold the tensioner to the block.

Can anyone help on this? Are there specific settings or not.

rgds

Iain
 
#3 ·
Sorry it took me a day to get back to this. I'm not sure that I found much that will help; it's probably too late for you anyway, but here goes...

My Bentley specifies AEB but doesn't differentiate for UK versus US specs. I don't know my information applies directly. Also, when looking at the blow-up picture in the manual I can't identify the bolts as you have decribed them. Here is my best guess...

1. Big Roller to Block - 25Nm (18 ft-lb)

2. I can't find what you are referring to.

3. Small Aux. Roller to Tensioner - 25 Nm (18 ft-lb) Note - this is from the AUG engine as the Bentley diagram for the AEB only shows the old tensioner.

The most important thing I can tell you is that there are only two bolts identified which require high torque. They are the Crankshaft Sprocket Bolt (this is for the timing belt sprocket, not the ribbed belt pulley) and the Intermediate Shaft Sprocket Bolt. Neither of these needs to be removed during timing belt replacement. All the other bolts shown in the blow-up are specified at 10, 20 or 25 Nm, depending on their diameter.

HTH.
 
#4 ·
Jaero,

thanks very much - I set them to 25Nm so all is well. Car is back together & running fine. I had/have a slight issue where the belt is running slightly off centre on the camshaft sprocket - its sitting maybe 1/2 to 1 mm back from the edge of the sprocket (which I guess means its ovehanging slightly at the rear). I took it to my local independant today & they looked at it through the top timing cover & said it was fine - quite a few of them sit like that apparently.

If anyone wants a picture of this for reference I'll post one.

Thanks for your interest.

rgds

Iain