Imo000

Charles,

I beleive there is a typo in your reply to my post. Second paragraph, second line should be ball not roller.

Charles Navarro

Thank you, correction made.

Charles Navarro

How about a memory refresher:

http://986forum.com/forums/boxster-p...ines-sale.html

http://986forum.com/forums/general-d...g-failure.html

GLIDE

mattie_k

This thread is almost as good and twice as informative as the "45 vs. 9mm" threads on the gun sites!
Always more ways than one to skin a cat......

Flat6 Innovations

To be effective, you have to hit the target.

No matter what I'm shooting, I hit the target.

mattie_k

Accuracy over power is always my preference. That's why I favor my 1911.

That said, when the time comes I'm sending my car to Jake for a hot rod build.

Flat6 Innovations

I'm all for short, fat and slow, too.

Ahsai

Since you guys changed topic, let me switch as well. I was able to trace all the internal coolant passages cast into the block. My question is "Is the green path of coolant flow correct?"

Dashed line means the line is internal hence not visible externally. The red path is provided by the oil pump assembly (removed and not shown in the pic). The water pump sucks up the coolant from the center circular port (red and green flow) and pumps out the yellow flow for bank 1 and the blue flow for bank 2. Cooling the cylinders and heads from the bottom up to the top of the engine. Then the (yellow and blue) flows merge at the upper right then into the red arrow which goes back to the pump.

The return side of the green flow is controlled by the thermostat so when the coolant is not up to temp, the green flow is not flowing but when the thermostat starts to open, the green flow will start to flow. The thermostat is sensing the temp of the red flow.

Flat6 Innovations

Thats fairly close, BUT the front console enters the equation, and changes things up a bit.
You'll learn the coolant path in my classes. We go over this first, in the 101 class, online.

Ahsai

Jake, it's good to know I will learn this in your engine rebuild class. By "Front console", did you mean the heater core? That seems to be just another parallel circuit similar to the cylinder/head circuits? I've added that (black flow) and the coolant temp sensor, which taps into the lower part of the red flow in the diagram.

If the green flow (and its direction) is correct, that begs the question why people say the coolant temp sensor is at the RETURN path AFTER the radiators when it's actually at the return path of the coolant right after the cylinders and heads?

Flat6 Innovations

The front console bolts onto the engine, and houses the oil pump, and provides for completion of the coolant paths.

Ahsai

Got it. The front console is not shown in the pic and I tried to represent it by the red flow. I found it interesting that there are multiple parallel flows which are controlled (metered) by the cross section areas of the opening of each flow. ...must be very carefully designed as one flow affects the other as they are in parallel and coolant will try to find the path of the least resistance.

Flat6 Innovations

Absolutely. You also have bypasses and heater return that enter into the equation of the front console.

Some aspects of the cooling system don't make sense.... Epoxy can change everything :-)

Ahsai

Yea, the front console is a big merger of a few flows.

Another question. Do you know what are those 6 circular dots on the top of the craddle in the pic (of course you know. I should have asked if you could tell me...)? I can't find any documentation of those.

Pic is courtesy of autopartsboutique01 on eBay