P80 lower timing belt cover bolts 974674

johnhb · Post by **johnhb** » 05 Mar 2017, 01:04

After replacing the camshaft seals, upper cylinder block to lower cylinder block seal, timing belt, water pump, tensioner wheel and idler wheel I am left with two unusual bolts.
They are M7 hex heads 43 mm long. There is 10mm of thread at the head end of the bolt and the rest is a slightly tapered shaft. They have obviously been used somewhere as they have old thread lock on them. I have looked at dozens of images on Google and searched over the engine sever times looking for two matching holes. The only item I have yet to reinstall is the auxiliary belt tensioner, but I have those bolts.
I have included a photo. Hope someone can recognise these bolts and tell me where they belong.

: bolts.jpg (67.09 KiB) Viewed 2172 times

Post by **abscate** » 05 Mar 2017, 02:48

Some of the components you replaced come with bolts, maybe you have these old ones as spares now?

Apologies for this after the cows have left the barn , but it really pays to push fasteners through paper, label them, and then store them in a box until needed. I use pizza boxes and then buy a new box at the end of the job, which comes with a free dinner

johnhb · Post by **johnhb** » 05 Mar 2017, 03:07

abscate wrote:Some of the components you replaced come with bolts, maybe you have these old ones as spares now?

Apologies for this after the cows have left the barn , but it really pays to push fasteners through paper, label them, and then store them in a box until needed. I use pizza boxes and then buy a new box at the end of the job, which comes with a free dinner

The only replacement part that came with new bolts was the water pump. They are different bolts and shorter. I did place all other bolts and parts in containers that were labelled. Also I took photos on my camera but somehow these two bolts slipped through.

beigg · Post by **beigg** » 05 Mar 2017, 03:53

Is your caliper still hanging off the bracket?

Post by **abscate** » 05 Mar 2017, 05:21

johnhb wrote:
abscate wrote:Some of the components you replaced come with bolts, maybe you have these old ones as spares now?

Apologies for this after the cows have left the barn , but it really pays to push fasteners through paper, label them, and then store them in a box until needed. I use pizza boxes and then buy a new box at the end of the job, which comes with a free dinner
The only replacement part that came with new bolts was the water pump. They are different bolts and shorter. I did place all other bolts and parts in containers that were labelled. Also I took photos on my camera but somehow these two bolts slipped through.

I'll confess I've made the same mistake a few times. Give people a few days, I'm sure someone will recognize them, they are quite distinctive.

Post by **wizechatmgr** » 05 Mar 2017, 06:33

Reminds me of brake sliders...

Post by **cn90** » 05 Mar 2017, 08:36

I agree that these look like Brake Slider Bolts, but the 850, V70 series does not use this type of bolt.
These look like a Volvo S40 slide bolts, or the Mazda Miata type.

Post by **MrPc** » 05 Mar 2017, 09:44

Those bolts look vaguely familiar..... By any chance, do you still need to install the belt guard that goes around the bottom of the crankshaft pulley? It seems to me that those bolts are similar. IIRC the long nose helps get things lined up and the threads started. (Although I still found it a kinda hard...)

beigg · Post by **beigg** » 05 Mar 2017, 10:02

MrPc wrote:Those bolts look vaguely familiar..... By any chance, do you still need to install the belt guard that goes around the bottom of the crankshaft pulley? It seems to me that those bolts are similar. IIRC the long nose helps get things lined up and the threads started. (Although I still found it a kinda hard...)

Bingo!

skloon · Post by **skloon** » 05 Mar 2017, 11:51

They look like the lower timing belt shield bolts