Timing belt/ater pump replacement on TDI?

Do the pump. Most of the cost for either is the labor and the labor with or without the pump is almost the same. It's cheap insurance.

Not an experienced anything, but lots of visits to

Make sure they replace the bolts, they "stretch" when installed (maybe the new ones don't?). There are plenty of disaster stories of broken bolts dropping engines after a poorly-done TB change.

They stretch only once. They can't do it twice so they are used only one time. Same type of thing was used on my 1965 Sunbeam Imp. Well worth the extra few dollars.

Sorry I don't know. I would go to the dealer and buy them They will not be all that expensive. They will just seem expensive.

I've always had the impression that only the head bolts "stretched". My only experience here is an 84 diesel Jetta so I may be wrong. Are there other bolts on the motor that stretch, maybe on a newer vehicle?

WhiteDog

Starting with the A4 chassis, (mid 99 model year) there are lots of stretch bolts under the hood of a tdi car. Motor mounts, sub frame, injector pump and more, a green tint is the tell tail sign. Also the A4 tdi's use the waterpump for a ideler for timing belt so it should be replaced. But this does not apply to a 98 tdi. The original poster was asking about a 98 tdi. It's a A3 and more like the earlier diesels.

JoBo

I reused my bolts on the waterpump when I replaced my A3 2.0L gas waterpump. It worked okay until I found out the brand new waterpump was faulty and had a leak out of the weeper hole. The second time around was easier and I still reused the bolts. No problems since.

||In article , ||WHTDOG469 wrote: ||>>From: Wakeley Purple snipped-for-privacy@remove.me.iglou.com ||>

||>>Not an experienced anything, but lots of visits to

||>>Make sure they replace the bolts, they "stretch" when installed (maybe the ||>>new ones don't?). ||>

||>I've always had the impression that only the head bolts "stretched". My only ||>experience here is an 84 diesel Jetta so I may be wrong. Are there other bolts ||>on the motor that stretch, maybe on a newer vehicle?

All bolts stretch under toque. That's how they work. In fact, the most accurate way to measure the torque of a rod bolt is to measure the change in overall length (stretch) when torqued. It's right when it's exactly the length specified for that fastener. Many newer engines - 1.9 Escort was the first I recall - have a type of headbolt called Torque to Yield. They do not return to their original length when removed, so they must not be removed. If your engine has this type of head bolt, there should be plenty of clues, on the gasket set, in the workshop manual. Texas Parts Guy

|| Many newer engines - 1.9 Escort was the first I recall - have a type of ||headbolt called Torque to Yield. They do not return to their original length ||when removed, so they must not be removed.

should say "..must not be reused" Texas Parts Guy

The stretch bolts are the ones that bolt the timing belt assembly on to the engine block. Many dealers don't use new bolts when changing timing belts, which is very risky. If you ask a VW dealer's parts dept. if they have them in stock and they tell you no, you have your answer. In that case, what do you suppose the mechanics there are doing?

I'd also change the water pump at the same time.

Your right about the dealer parts department not having them is a good sign. However on the A4 (second half of 99 to present) tdi's it the motor mounts use stretch bolts. The mount must be removed to replace the belt. Also some, at least my 99.5 jetta,use them on the injector pump pulley also.

JoBo