V8 timing belt or chain? (2008)

volvothirdtime · Post by **volvothirdtime** » 08 Oct 2010, 15:35

I have some time before I should have to address this.
Can anyone definitively tell me if the Volvo V8 (which I
gather Yamaha designed and built) uses an external timing
belt (as many previous Volvo models do) or an internal chain ?

I ask only as I have talked with several dealer service departments
and it is about 50/50. I am guessing the service advisers honestly don't
know and pick an answer.

Best info I have is a marketing brochure showing a cut way view.
It shows what looks like a chain, but it is a sales piece.

Thanks to all.

Post by **dcarlson12** » 14 Oct 2010, 17:07

I don't know, but can't you look at the 'front' of the engine for a clue? Sounds pretty sad if the dealer(s) can't tell you....

Dapple3 · Post by **Dapple3** » 26 Oct 2020, 10:07

Timing chain. Engine was designed by Volvo, built by Yamaha

Post by **RickHaleParker** » 26 Oct 2020, 18:11

Dapple3 wrote: 26 Oct 2020, 10:07 Engine was designed by Volvo, built by Yamaha

Design specs by Volvo. Engineering and manufacturing by Yamaha.

Same engine block is used for the Yamaha F300V8, F350V8, and XTO Offshore outboards. Got to wonder if the lower end from a Yamaha outboard can be used to get up to 5.6 liters of displacement and up to 425+ hp. The XTO 425 is 5.6L 425 hp.

Post by **volvolugnut** » 26 Oct 2020, 18:33

RickHaleParker wrote: 26 Oct 2020, 18:11
Dapple3 wrote: 26 Oct 2020, 10:07 Engine was designed by Volvo, built by Yamaha
Design specs by Volvo. Engineering and manufacturing by Yamaha.

Same engine block is used for the Yamaha F300V8, F350V8, and XTO Offshore outboards. Got to wonder if the lower end from a Yamaha outboard can be used to get up to 5.6 liters of displacement and up to 425+ hp. The XTO 425 is 5.6L 425 hp.

RickHaleParker, I encourage you to try the 5.6 L modification after you get your V8 project sorted out.

volvolugnut

Post by **RickHaleParker** » 26 Oct 2020, 19:24

volvolugnut wrote: 26 Oct 2020, 18:33 RickHaleParker, I encourage you to try the 5.6 L modification after you get your V8 project sorted out.

I don't think so. The 5.6 is only two years old and they are $45,000 engines. I would need the crankshaft, rods and pistons from a 5.6. Different stroke and bore. In other words a short block 5.6. That is if the crankshaft will bolt to the Volvo transmission. Heads on the 5.6 are reverse flow, exhaust manifold is between the heads. Would need to use the Volvo heads unless I route the exhaust out the hood.

The 5.3 is the same bore as the 4.4.