Countach QV Engine remove - Page 3

raymond · #21 (**permalink**) 04-04-2005, 01:51 PM

A question for John:
perhaps you can see the lower valve spring tapet was fixed with the bloody orange silicon, shouldn't these be free to let the spring and valve turn ?

I mean part #22 of this layout:

Can you recommend a source for the valve guide seals?
If possible softer ones than these of the factory...

JRV · #22 (**permalink**) 04-04-2005, 03:10 PM

Raymond,

Yes, the Cups and Valves are supposed to rotate during use to clean the Valve Face and keep the shim from wearing a groove in the surface.

There are several manufacturers of valve guide seals, but generally only 2 types, the metal & rubber type and teflon type. Any good Head Shop in your area will likely have both types availible.

raymond · #23 (**permalink**) 04-04-2005, 10:50 PM

That must have been a true home mechanic who put everywhere this bloody orange silicone, we will now remove all of this stuff!

I will also think of replacing the two valve springs with a single progressive one, perhaps it would be an idea to replace the cup with titanium

For the valve guide seals, do you know another car with fitting seals?
Does it make sense to install them also on the exhaust valves?

Since in the parts manual the seals are mentioned with 48 pieces, but I suppose the factory saved parts, because also the Jalpa of a friend had them only on the intake side...

JRV · #24 (**permalink**) 04-05-2005, 06:44 AM

Quote:

For the valve guide seals, do you know another car with fitting seals?

All the 4V (QV) Ferraris (308, TR, 348, etc) used the same size and type of seals. Look at the outer Top Edge of the Ex. Guides to tell if they are supposed to be fitted with seals.

I see the nail you were talking about in the pic, maybe the guy who put the silicone everywhere was a Carpenter not a Mechanic.

raymond · #25 (**permalink**) 04-05-2005, 01:03 PM

John,

my mechanic knows since he worked at a Ferrari Dealer, do you know soft seals instead of originals?

JRV · #26 (**permalink**) 04-05-2005, 01:52 PM

Raymond,

I just looked closer at the pics you posted of the valve guides. I believe I can see the machined top on the intakes where the seals fit on and it appears the exhaust guides have no such cut down portion for a seal, which would incate the factory determined that 1- the ex. didn't need seals or 2- the ex. needed more lubrication & cooling from oil so seals were not used.

raymond · #27 (**permalink**) 04-05-2005, 03:07 PM

Thanks John.

I took some new parts for detailing...

JRV · #28 (**permalink**) 04-05-2005, 07:05 PM

Quote:

I mean part #22 of this layout:

Ahhhh...#22 is the Spring Base...certianly not supposed to have glue on it but it wouldn't hurt anything or prevent the valve from turning.

ALSO, ...in looking at the parts diagram more closely (& slowly) I notice that Lamborghini actually shows two different guides and the picture of the Int. Guides shows an oring AND a normal valve guide seal, while the Ex. shows only the oring type scraper/deflector seal. This is why the Ex. & Int. Guides have different tops that I mentioned. For your seals try an ELRING supplier.

This confirms that Lambo intended for the exhaust valves to have more access to oil for both lubrication and cooling.

raymond · #29 (**permalink**) 04-07-2005, 02:30 PM

An update from the parts...

before:

now:

Carbs are also completely overhouled and like new now:

raymond · #30 (**permalink**) 04-08-2005, 02:07 PM

An update from the engine side, all carbs are cleaned checked, joints replaced etc:

Cylinder Head, all valves polished:

The valve tapets removed, the silicone will also disappear soon...

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