OP: Oil Pump Oil Pump and Oil Feed Alternatives

[Martyn Goodwin]

Paid CASH for our last car - Brand New VW Passat. Dealership went into a flap when they saw we had a bag of the folding stuff - said they did not have the facility to accept cash. After some time where the term "Legal Tender' was bandied about 3 (three) of them got together to count it. Then there was a pile of anti-money laundering paperwork filled in and signed by all.

 

[highbury731]

Nigel my handsome, fit an extra pump.
Over 300k on same MK 2 cams, first 100k 5 to 10 thou worn next 200k 2 to 4 thou.So they will see me out Because I fitted a Honda oil p/p and have a constant 0.5 to 1.0 bar pressure squirting through cams onto stelited followers.
bananaman

What pump do you fit, and how do you go about it?
Paul

 

[davidd]

It is often a Honda oil pump. It is run off the large idler. It is a complicated project. See MPH 420 at page 20.

David

 

[Marcus Bowden]

This is the item £32 each have gone up £2 in three years.

 

[Marcus Bowden]

First stage is to plug the scavenge hole with a pipe creating a wear , raising the oil level so leaving a reservoir for the Honda pump to suck from.

 

[Marcus Bowden]

Don't know how that happened two pictures on previous transfer.[edit, I fixed it]
I'm doing them individually so I can get a higher resolution picture on here.
Here the pipe is threaded through c/case hole looking up, top left securing Alan bolt of idler boss is a hose clip to retain hose in position. There is also another pipe clamp inside c/case drilled & tapped 3/16th" BSF securing the pipe, previous picture one can just see it at the top.

 

[Marcus Bowden]

A narrow pinion 1/8" to 1/4" wide is mounted on a shaft through a bearing all retained in a steel housing which is later milled off to allow engagement of gear into idler wheel, outlet pipe is led up to the front inlet cam follower spindle with banjo and the nut is machined so it is spiggoted into banjo giving and extra thread, Drill through the side of the spindle thread to allow oil to pass and I've plugged the spindle so no oil is going to liner. nor the rear cylinder.
The latest p/p fitted is the high capacity which has a wider element and had to machine p/p cover to take countersunk Alan screws as it was touching inside of timing cover, the jet holder in top of timing cover I had removed to fit 4 mm ball bearing so all oil went to cams now with bigger p/p I've left ball out and I have 2 bar (30 psi) at start up and about 1 bar when warm. The reason for the 4 mm ball was to act as a non return valve (NRV) so if the Honda pump failed the original would take over by pushing ball out of way.

 

[highbury731]

Very ingenious! It looks to me that blocking the scavenge hole and fitting the feed pipe have to be done with bare cases, but the rest is a bolt-on modification. I think that this means the standard pump just has to feed the big end, so it gets an increased supply as well.

 

[Nigel Spaxman]

I like this extra pump. I wish I had done it on my engine, I think I will do it on my next engine. It doesn't look as though there is any way to do this on my Rapide without taking the engine right down to the bare cases. I don't want to bother with all that work. If with the oil system standard and MKII stelited cams I can get he wear down to .005 to .010 in 100,000 miles that will be good enough. I wonder if on my second engine I put in the Honda pump and use hardened cams and stelite followers if the wear will be reduced to reasonable levels. I haven't heard of people using hardened cams and stelite followers, but that is the way most of the other British machines were made and that worked for BSA, Triumph and Norton (usually).

 

[davidd]

Nigel,

Godet's Flashes have a high pressure oil pump and no stock oil pump. He had the advantage of building the case from scratch. The oil pump chamber is used as a distribution chamber for the pressurized oil. If you were to buy a 500 engine from him you also have to have his ufm as they are a matched pair. The ufm is designed to work with the high pressure pump and it also distributes the oil differently than stock.

I was not aware that many bikes had hardened cams as it is relatively expensive. I have my cams hardened when I order them.

The followers from the Club, I believe, are already hardened and do not need Stellite. I have had them tested and the have turned out to be 60. The hardened cams tend to run 60 to 65.

David