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P80 lower timing belt cover bolts 974674

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

johnhb
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P80 lower timing belt cover bolts 974674

Post by johnhb » Sun Mar 05, 2017 1:04 am

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
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abscate
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Re: Unknown special bolts

Post by abscate » Sun Mar 05, 2017 2:48 am

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
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Re: Unknown special bolts

Post by johnhb » Sun Mar 05, 2017 3:07 am

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.

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Re: Unknown special bolts

Post by beigg » Sun Mar 05, 2017 3:53 am

Is your caliper still hanging off the bracket?
ugh smh 850 Turbo fridge

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Re: Unknown special bolts

Post by abscate » Sun Mar 05, 2017 5:21 am

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.
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Re: Unknown special bolts

Post by wizechatmgr » Sun Mar 05, 2017 6:33 am

Reminds me of brake sliders...
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Re: Unknown special bolts

Post by cn90 » Sun Mar 05, 2017 8:36 am

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.
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Re: Unknown special bolts

Post by MrPc » Sun Mar 05, 2017 9:44 am

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...)
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Re: Unknown special bolts

Post by beigg » Sun Mar 05, 2017 10:02 am

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!
ugh smh 850 Turbo fridge

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Re: Unknown special bolts

Post by skloon » Sun Mar 05, 2017 11:51 am

They look like the lower timing belt shield bolts

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