ROG100

That is a Hamburg Technic Chinese build pump and buy at your peril.

Only use a new water pump - we sell the Laso 78 to 86 new with plastic impeller and Porsche gasket for $285.
Let me know if I can help you - roger@928srus.com

Imo000

I'll see if I have pics of the WP, but I'm very sure it wasn't plastic.

ROG100

Imre,
If it was metal we were very very unlucky and for some strange reason. They stopped making them with metal impellers at the beginning of 2010.
So all new WP's since May 2010 have been plastic and my supplier was the first to get them from Germany. Your invoice even says plastic and if it was metal I wished you had said something as I would have replaced it immediately.
Roger

Jakkq

Ahh I figured as much... Defiantly do not want to buy some Chinese POS. When it comes around time to order a new Water Pump I will contact you, Rog. I had also e-mailed you awhile back on a Fuel Line Kit. Searched 928sRus, but did not see anything. Still need to get a hold of that Fuel Line Hose Kit.

Would buying a Used Radiator be a good investment, or would I be better off going brand new?

Landseer

New and self-install it.
Did you identify a certain weakness or leak in the old one?

blown 87

Why would you need two used radiators?
You have a used one all ready.

Jakkq

What are some self checks I can do to identify if the Radiator and Water Pump are functioning correctly/incorrectly ?

Jakkq

Okay, I drained the coolant. I unscrewed the Drain Plug to reveal that not a drop of anything came out... I looked up into it to notice blockage, so I jabbed at it with a screwdriver to reveal about a handful of muddy muck that fell out, before the coolant then began to drain.

Here are some pictures of the outcome: http://porsche928workblog.blogspot.c...ant-check.html

I don't believe this is oil mixed with the coolant. It isn't exactly a milk chocolate color, and it smells only like coolant. I trailed the cooling hoses to the Thermostat Housing, which when I removed the housing, a good amount of this "mud" poured out along with some extra sitting coolant.

Probably a good sign the radiator is shot? A Combustion Leak test was recently done, which came back negative.

Is this debris build up, rust, or is this really oil, maybe coming from the Oil Seperator?

Mrmerlin

you also need to drain the block drains and then add some water to flush out the system,

it looks like a coolant system thats not been serviced in a long while,
and the coolant has stopped protecting the block and headgaskets and heads

jeff spahn

I am willing to bet you really should replace your head gaskets. If my head gaskets on my 90 were in the condition they were I can bet yours are just as bad or worse. Bite the bullet, put new head gaskets in and drive it for another 100,000. Your coolant is toast. Best to do the right thing. I think I spent a total of $1500 doing the job myself with the workshop manuals and a dozen calls to different Rennlist people when I got stuck.

Pull the engine, if you have the garage/space and do it on a stand. It is 1,000 times easier than doing it in the car. Best advice I got was to buy a quality torque wrench. Spend the $500, get a Snap On digital angle wrench and sell it for $495 when you are done. Cheapest tool rental you can find.

Also, when you torque the heads on the two (or three depending on year) 90 degree torques and the washer moves, start over. (thank you Greg and Greg).

Pulling the engine with a hoist seems hard and scary but isn't. Just disconnect the electronics in the passenger footwell and figure out the way to feed the wires through, they'll go, trust me. I didn't think they would and they did. While you are at it, replace the motor mounts, heater hoses (all of them), Power steering hoses, AC hoses, fuel lines. It is all so, so easy when the engine is out. You can stand in the engine bay and just put things in like they did at the factory.

Then you can clean, clean, clean everything. Might as well put a super clamp in too while you are at it (didn't see if you had auto or manual.) It's the perfect time to do it.

Jakkq

Wow, what do you guys think I should do with this? I spent $3400 on the car in the first place, and it looks like I'll be needing to put into close of $4,000 to the engine, not to mention it needs new paint, interior parts, new tires, and so forth.

I think this might be worth parting the car out, and taking the 928 engine into my Automotive Shop to work on, and rebuild/replace what needs it, study and learn the entire 928 engine, then sell it. This gives me the advantage of knowing what I'm dealing with on the engine of the next 928 I get, which is obviously going to be a better example than this one I have at the moment.

Don Ashe

Austin-
Don't get ahead of yourself.
So far, all those pictures show for sure is that your coolant is shot, and your thermostat is scary looking. It says nothing definite about the condition of your radiator, engine etc. other than they need looking into.
You need to take this one step at a time, identify the known issues and resolve them.

Fluid from the exhaust and the empty coolant reservoir were probably just coincidental, since filling the reservoir did not result in continued fluid. As Wally said, there is plenty of fluid generated by the engine itself that would account for the wet exhaust.
Are you certain the coolant reservoir was full prior to discovering it empty? It is very probable it was not.

If your radiator is leaking, it is possible to repair it, depending on where the leak is. They often leak at the seam where the side tank meets the aluminum core, especially the passenger side, and there are several good write-ups on replacing this gasket. There are also radiator shops that do Behr radiators that can take care of this for much less than the cost of a new radiator.
Either way, if the leak isn't too major, you can work with a leaking radiator while you address the other known issues, especially since this is not your daily driver.

As for the water pump, I am highly skeptical of their ability to properly diagnose that with the engine in it's current condition.

My next step would be to flush the cooling system and replace the thermostat (with one from one of our vendors). Plenty of good write ups on that procedure here. While you've got the garden hose out, clean the engine some more so you can inspect for leaks.
Once you have that done, you'll be able to better assess the condition of your engine and cooling system, and it won't cost an arm and a leg to do so.

I would certainly plan on doing the water pump and timing belt soon, but it may not be so urgent, if the cooling system flush and thermostat replacement resolve your issue.
That way you can acquire the parts over time, and plan and research the job more calmly and methodically.

HTH,
-don