16V on a 8v Block "I think not"

BXrunner · Post by **BXrunner** » Tue Mar 04, 2008 6:59 pm

got a guy at work bragging he can fita 16v head to the standard BX 1095 engine is this cosher and is it easy to do only thing I've changed the head on was a Range Rover V8 that was idiot proof. if it's dohc then it aint possible if its sohc then you're the experts

cannot see the benefits

jeremy · Post by **jeremy** » Tue Mar 04, 2008 7:26 pm

The 16 valve head may well bolt on - but then the interesting bits start - like the pistons have valve cut outs - the cam drive is rather different, the oil pump is half as big again - and in fact the 16 valve has a special block which is stronger.

The 16 valve achieves its power by virtue of excellent breathing - so you will need the manifold, some if not all of the exhaust, and of course the fuel injection and ignition system.

Easier to buy the whole lot!.

8 Valve GTi is nearly as quick - and they're cheap enough.

BXrunner · Post by **BXrunner** » Tue Mar 04, 2008 7:30 pm

so in short he's talking BS

DavidRutherford · Post by **DavidRutherford** » Tue Mar 04, 2008 7:47 pm

Just because you CAN do something doesn't mean there's any point to it. I'm quite sure you could indeed fit a 16v head to a standard 8v block, but there's no point in doing so.

BXrunner · Post by **BXrunner** » Tue Mar 04, 2008 7:55 pm

a bit like the lads of a certain age fitting intercoolers to Astras or Renault 5's. I imagine the 16v is almost entirely different the carb 8v fuel injection to start with then you say different stronger block

Post by **docchevron** » Wed Mar 05, 2008 11:58 am

It's a shit idea, and the guy at your work is a moron.
You could bolt a D6C head to an XUD block, but it would be as pointless as teaching a Gazelle to juggle Penguins.

MULLEY · Post by **MULLEY** » Wed Mar 05, 2008 1:07 pm

Way2go · Post by **Way2go** » Wed Mar 05, 2008 3:53 pm

docchevron1472 wrote:but it would be as pointless as teaching a Gazelle to juggle Penguins.

Well, you couldn't teach it but you could probably juggle the biscuits in this!

Kitch · Post by **Kitch** » Sat Mar 08, 2008 12:21 pm

It's actually alot harder than it sounds. The waterways don't line up for a kickoff, and the oil pump isn't as strong. The crank is also weaker so it won't like you spinning it to the 7200rpm limiter the ECU sets it (which is imperative to successful 16v ownership

)

Basically a totally pointless operation unless you only have an 8v block and have all the bits needed to change it.

Post by **docchevron** » Sat Mar 08, 2008 12:28 pm

Me thinks, in short:

cavmad · Post by **cavmad** » Sat Mar 08, 2008 6:02 pm

docchevron1472 wrote:It's a shit idea, and the guy at your work is a moron.
You could bolt a D6C head to an XUD block, but it would be as pointless as teaching a Gazelle to juggle Penguins.

BXrunner · Post by **BXrunner** » Sun Mar 09, 2008 5:56 pm

cavmad wrote:
docchevron1472 wrote:It's a shit idea, and the guy at your work is a moron.
You could bolt a D6C head to an XUD block, but it would be as pointless as teaching a Gazelle to juggle Penguins.

a very bad idea the guy is a moron and got fired yesterday

Kevin B · Post by **Kevin B** » Mon Mar 10, 2008 9:15 am

Some time ago I bought what appeared to be an Mi 16 engine from the local scrapyard, this was a bare engine that was on the dirty Aluminium pile.

It was a bargain price of £20. It turned over and even had compression.

I only wanted it for the head, so upon stripping it down imagine my surprise to find it had two head gaskets fitted. Also there were no cut outs in the tops of the pistons (8V pistons). Further stripping revealed it to have the 8V crank, block, and 8v connecting rods which have press fit gudgeon pins.

Although dissapointed with the contents of the bottom end an unexpected bonus was as new 8v pistons, and as new 8v liners (which I still have).

The most major difference on the 8v block compared to the 16V block, is where the drivers side engine mount is bolted to the block (as it has additional bolts for the 16V engine mount, though 3 of the four 8V bolt holes were in the right location). Dipstick location is also different, and there is an absense of provision for under piston oil cooling jets.

Further more I understand the 205 fraternity are now using 8V liners in Mi16 rebuilds due to the expense and difficulty in finding the correct 16V liners (which are heavier and ridged on the outside diameter) .

In short there is no advantage in doing this unless you have a stuffed 16V cylinder block and cant cant find a good s/h replacement 16v lump. Although you can build an engine to this spec it will not have all the 16v refinements ie under piston oil cooling jets, so it will always be limited in comparison to the real thing.

simonbx17 · Post by **simonbx17** » Mon Mar 10, 2008 7:17 pm

xu7td plus 16v head is it posible