about $2000.
On the camshaft
The 2003 Honda Element has a cam chain that should last the life of the engine.
Yes it does interchange. 1990-1993 Accords have the same camshaft pulley (or cog).
Honda Element was created in 2003.
It depends. If you're under warranty, go to a Honda repair shop. If you're not, go to a reliable generic shop. They're usually cheaper and can provide the same services as the Honda repair shop.
A 2005 Honda Element should have a spark plug gap that is set at .044 inches. Almost all Honda engines are set with the same spark plug gap.
You can find a Honda repair manual at most local libraries. You can also find the repair manual at most Honda dealerships.
very carefully
http://www.autotalk.com/how-to/honda-element/honda-element-03-04-keyless-remote-programming-instructions.html
There are a lot of places in order for one to find a Honda Element for sale in London. However it is strongly suggested that one should check out from the website AutoTrader.
It is extremely important as well as all other parts of the camshaft and cylinder head.
SAE 5w20 any major brand.