Blue top vs Silver 582

[DieselFan]

Whats the diff?

[Morph]

The 582/99 or blue head mainly attempts to fix a cooling system deficiancy
by introducing a bypass - this in itself is a great improvement over the old
582 and seems to eliminate the possibility of cold seizures that so much
haunted the old 582.

[DarkHelmet]

The obvious difference is the blue vs silver top of the older model

I recall it had to do with better cooling but not the correct details.

From http://www.durham-microlights.co.uk/technical_tips.htm nogal by our own Rainier Lamers - just search for 582/99

The 582/99 or blue head mainly attempts to fix a cooling system deficiancy by introducing a bypass - this in itself is a great improvement over the old 582 and seems to eliminate the possibility of cold seizures that so much haunted the old 582.

[DieselFan]

Thanks for prompt help as usual!

[Ian]

Doesn't the Blue top have a bit more power as well ?

[Duck Rogers]

Doesn't the Blue top have a bit more power as well ?

No

[DieselFan]

Doesn't the Blue top have a bit more power as well ?

The article does mention "mainly", so I wonder what else?

[Spongebob]

Would it be possible to convert a silver top to a blue top? If so, is it worth it?

[Morph]

Would it be possible to convert a silver top to a blue top? If so, is it worth it?

Of course you can :D

Take your silver top to Aviation Engines. Tell them you want a Blue Top. Pay some money, viola

[RV4ker (RIP)]

Is always this option

[John Young]

Is always this option

RV – you are unique – glad they broke the mould. Gee, imagine 2 of you !!

Regards
John ZU-CIB

[RV4ker (RIP)]

[Spongebob]

RV, my top nearly split on seeing your reply, what shall I say except, we are not worthy o great orator of the electromagnetic waves :D :D

[Morph]

What scares me is the colour match is perfect. I sense this has been done before

[Boet]

The 582 / 99 ( Blue top ) has a by-pass hose from the top of the engine to the back of the water pump. When you start the mod 99 the water FLOWS around, making for more EVEN and quicker heating up, thereby largely elimanating the chances of cold seizure. With the old mod 90 (Silver top ) there is no by-pass. therefore, untill the thermostat opens, all the water pump did, was to cavitate in water that was not going anywhere.

While on the topic of cold seizures, a question I have to answer frequently. When you fire up a COLD engine, do not increase power too fast. The piston is made of aluminium. The cyl-bore is cast-iron. If you hammer a cold engine, the piston heats up much faster than the cylinder bore. The piston expands and gets too "big" for the "colder" cylinder, and this leaves no space for the poor piston rings, and too much friction caused by too little clearance then leeds to cylinder / piston seizure. A very expensive little exersize!! :D