Triumphrat

Caulky

As an addition to the other thread, `blessing in disguise`. The paraffin flush was quite clear.
So I filled it with the cheapo oil for an oil flush.
When kicking her over to check for scavenge return, these clicking sounds appear. The balls seem to be engaged with the cups.
I can feel something that seems to be a double click by feeling the exhaust tappets.
My original thought was piston hitting valve/s, but how?

Now some advice please.
This last rebuild needed new barrels, head refurbished...new guides, valves...etc.
I bought standard 650 valves, but I have no idea what what camshaft is fitted. IF someone has put a high lift camshaft in, would this cause the pistons to hit the valves? Are some valve stems shorter?

BTW, no scavenge...new oil pump out for inspection. It never rains...

pookybear

Caulky,

Easy question comming right back at you here. When you did
these oil changes, did you reprime the sump with a little oil first?


Usually a pint does the trick. It gets the return working right
away, and lube the rocker right away as well. That clicking
noise might have been just a dry top end.

Pookybear

OzBloke

Good post, Pooky.

__________________
Per Ardua Ad Astra
(Through difficulties to the stars)

Caulky

pb, I am in the process now of flushing the system out. The reason was unexpected grot in the oil after mistakingly topping-up (less than 1/2 pint) the reservoir with old oil. I expected some thick, black, horrible stuff, but not lumps of metal. As previously mentioned, something nasty has happened to this engine in the past...bits of broken valve collets dont appear normally!
First question is how would I get oil into the sump? Pour it into the rocker boxes?
OK, I should have flushed it out properly the last time.
There seems to be a lot of small sticky lumps of hylomar (gasket cement) in the oil, which is making me suspicious of blockages in the small oil-ways.

pookybear

Caulky,

Yep, right through the rocker box, just take off one of the covers
and use a long funnel to get some oil in there. It really takes too
long for enough oil to build in the sump the other way, so it is
best to prime it up for the sake of your valve train.

Got compressed air at your place? You can always put some air
to it. However, you have to get the oil pump off and go right
to the ports. Just a little burst of air, if the passage is clear you
will hear it.

You can also try just a little transfluid in the oil. Transmission
fluid is full of detergents. Run for only ONE MINUTE and drain.
The transmission oil will break down the oil viscosity, so this would
be a last resort before a rebuild.
Note read little (in the statement above) as a half of a pint.

Pookybear

Caulky

Update, the clicking happens to both exhaust valves, BUT only immediately just past fully open (tappets down).
My triumph mate is stumped...check the pushrods aren`t fouling the tube, cant feel it.
The only places I can feel it is on the tapppet rockers and on the intermediate pinion shaft. All others nil.
Today I removed the exhaust rocker box and refitted it, to check the balls and cups are engaged...OK. Gapped the tappets.
Any comments, ideas?

jimmy bush

Valves hitting top of piston? That is about where it would happen. The exhaust is closing and the intake is opening (overlap). Loosen your tappets some and see if it still does it. Cams could be out of time?

pookybear

I notice in your original post you were not sure of what
cam you got over there. Now might be the time to find out.

Pookybear

George F

Caulky,
To more accurately identify where the clicking is coming from you might try the old schoolboy trick of using a long screwdriver....
With a decent sized screwdriver hold its point against various parts of the rocker boces and the handle part of the screwdriver against you ear. The noise resonates along the length of the screwdriver and where it is loudest is normally where your problem is!! Make a comparison between inlet and exhaust. This might help.
Additionally is there any lateral movement of the tappets on the rocker arm/spindle. When I recently rebuilt an inlet rocker box I managed to mistakenly compress the sprung washer (on either end of the rocker spindle) which allowed the some lateral movement - hell of a clicking noise. Put your fingers in the inspection cap holes and check.

Hope this helps - sorry for insulting your intelligencve if you already knew the screwdriver thing

George F

Caulky

Dont even think about that George...every and all suggestions are welcome.
Cheers, I`ll give it a go.
If I have to take the head off...again, I would give the garage a very wide berth.