The V8 Owners Forum -

Still busy dismantling and cleaning parts in preparation for reassembly. I've completely stripped down and cleaned the plenum chamber and have a question about the small aluminium plate fixed to the underside of the plenum throat by four bolts. It has two metal tubes, presumably for rubber pipes and appeared to have a diaphram of some sort within it (which was damaged during strip down). What is this curious plate and what is its purpose?

Re-assembly of the plenum bits and pieces will require some gaskets. Can you let me know where I can buy these?

And finally......I still can't budge the crankshaft pulley bolt having tried big bars, extension tubes, penetrating oil etc etc. Does any kind soul within 20 miles of Doncaster have an electric or battery impact wrench and socket they would lend me? I'd be happy to leave a cash deposit for safe return.

Thanks in anticipation of anyone's advice.

Steve

The curious assembly underneath the butterfly is a small water jacket. It's fed from a small outlet on top of the inlet manifold, and I can't recall where the other pipe goes.

Are you locking the crankshaft before trying to remove the bolt?

Chris.

Lord Steve wrote:a question about the small aluminium plate fixed to the underside of the plenum throat by four bolts. It has two metal tubes, presumably for rubber pipes and appeared to have a diaphram of some sort within it (which was damaged during strip down). What is this curious plate and what is its purpose?

Re-assembly of the plenum bits and pieces will require some gaskets. Can you let me know where I can buy these?

http://www.vintagemodelairplane.com/pag ... pot01.html

http://www.roversd1club.net/forum/topic ... hot%20spot

page 58 - home made gasket.

ChrisJC wrote:The curious assembly underneath the butterfly is a small water jacket. It's fed from a small outlet on top of the inlet manifold, and I can't recall where the other pipe goes.

Are you locking the crankshaft before trying to remove the bolt?

Chris.

Hi Chris, crankshaft locked on the end of the crank and blocks of wood in the internals. Crank isn't budging but neither is the bolt. I've had it stoof on end so that I could soak it with penetrating oil but so far it's resisting brute force and bad language.

ramon alban wrote:

Lord Steve wrote:a question about the small aluminium plate fixed to the underside of the plenum throat by four bolts. It has two metal tubes, presumably for rubber pipes and appeared to have a diaphram of some sort within it (which was damaged during strip down). What is this curious plate and what is its purpose?

Re-assembly of the plenum bits and pieces will require some gaskets. Can you let me know where I can buy these?

http://www.vintagemodelairplane.com/pag ... pot01.html

http://www.roversd1club.net/forum/topic ... hot%20spot

page 58 - home made gasket.

Ramon
Very interesting and useful website - thanks for the link but I'm afraid that I couldn't find anything on home made gaskets. Can you give me further directions?

Thanks

Steve

perhaps you cant see the pictures as an unregistered forum member - if so u need to register.

The picture of the final gasket is on page 58



You would need to read the passages about the problems he (john) faced and how we (various club members) solved the problem with him by a process of elimination and investigation on pages 56, 57 and 58.

The remnants



the first (incorrect) attempt



The pictorial evidence from exploded diagram



The second (correct) attempt



The final result

Lord Steve wrote:

ChrisJC wrote:The curious assembly underneath the butterfly is a small water jacket. It's fed from a small outlet on top of the inlet manifold, and I can't recall where the other pipe goes.

Are you locking the crankshaft before trying to remove the bolt?

Chris.

Hi Chris, crankshaft locked on the end of the crank and blocks of wood in the internals. Crank isn't budging but neither is the bolt. I've had it stoof on end so that I could soak it with penetrating oil but so far it's resisting brute force and bad language.

Fair enough.

I have used a scaffold bar on a 3/4" drive socket set in the past for particularly truculent bolts.

Chris.

Or, you could succumb to the devil of the tool store and buy yourself a Rattle Gun. They come in electric form if you don't have access to enough air.....

unstable load wrote:Or, you could succumb to the devil of the tool store and buy yourself a Rattle Gun. They come in electric form if you don't have access to enough air.....

Yes - they're sold as wheel nut removers and work differently to a normal impact driver. They spin up to speed then whack the nut, then repeat the process until it moves. Mine says 250 ft.lb. Cost about £30 from Maplin. A normal cordless impact driver would be several times that cost.

It worked on my crank pulley bolt (auto, so couldn't even put it in gear) Also used it to undo the cylinder head bolts.

Excellent device for the odd occasion you need it. Seen them on Ebay too.