Please let me introduce myself as a new owner of an 1982 928. As an owner of an 1981 SC and member on another site, I have to say there is a lot more 928 members on Rennlist, rather than on the competition site..but both sites are helpful when it comes to the Porsche hobby. Owning my SC, I have always wanted a 928, but the fact you need a special breed of mechanic to repair this brand of V8 motor rather than air cooled engine. Attached is the photos of my 928. It literally has been documented in every aspect by the PO who is now at a age which makes harder to work on, which is the only reason I purchased it from a small town in Texas. within the last 2 years, and history of the car, it has had the fuel tank replaced, fuel lines replaced, transmission and oil pan gaskets replaced, new cooling fans installed, new timing belts, water pump, new motor mounts, Even the A/C works..But of course every if you get a great deal you find there is always some type of surprise, in my case when you drive it, the temp gauge will gradually increase up to red line..I have done a lot of reading, and there seems to be lots of data on this issue..so maybe one of the specialist who figured out the solution can chime in..Here are the facts..the timing belt has been changed along with the WP. Both Fans have been replaced and are triggered either by the A/C and or temp probe..The PO also replaced the radiator with a new aluminium radiator. All of these additions were completed by a Porsche specialty shop. The only thing I cannot find that was addressed was the Thermostat..there is no documentation that it was replaced...so hopefully that will solve the temp issue..again thank you ahead of time for any help and hopefully I will be able to contribute some help at this site.
Al

 

Nice 928. Welcome to the club. Tons of information on this site to make ownership more enjoyable. Especially if you like getting your hands dirty occasionally.

 

CWO,

Congratulations on your purchase. Beautiful car! Great job on the pictures. So where are you from and where are you dragging it back to?

 

welcome to the 928 section of rennlist and congratulations!

regarding your temp issue, if you don't own an IR temp gun, get one today! the gauges are notoriously inaccurate
and you should first know what your true temps are and document at the hoses, radiator, and thermostat under varying
conditions. (cold, warm up, full operating temps) that way you will know for certain where you stand

best of luck

 

 

Nice car! I am a new owner myself for one year now and restoring my 928. Learnt a lot from the members here so this is what my observation is:

A post here tells if you do not have a thermostat installed at all the engine temperature will slowly rise because the fluid will short-circle as a result of the abcense of the thermostat. The waterflow finds the short way back into the engine the most easy route, so less is directed into the cooler.

 

Welcome! Car looks great. I'm not an expert - only 2 years in - but seems like thermostat failing to open is a leading candidate as cause of your temp issue. Documented on Rennlist and findable via Google or Rennlist search.

I will speak for many new owners and state: I sure wish my car had as much recent work as yours before I got it.

 

Thank you all ..I found this gem in Victoria Tx, and will be taking to its new home in San Antonio Tx. The PO was very happy that I purchased this car, as he was hoping to sell it to a Porsche Fan..I know that with all the service records and work the PO did, I am lucky on the condition of the car... if this site anything like Air cooled sites, then I am in good hands...This engine design is a lot different than an air cooled design, and have rebuilt my SC 3.0 engine and many other small blocks in the past..so I am in a learning process early Porsche water cooled motors....Since the water pump has been replaced as well as the timing belt, I am hoping that the Thermostat is the problem, as recommended, of which I have one on order.. ..I do have an IR gun and have tested the hose temp at various stages, and as Mantinger states, I think its a lack of Thermostat or fault one..I will post the results as soon as I get my replacement. Again thank you to all and hopefully I can contribute to this site eventually..
Al

 

 

I look forward to seeing you in person the first weekend of November in Marble Falls at the Third Coast Event. Go to 928sRus.com for more information.

 

Welcome!

It is much better - it has to be. These are more complicated cars - water pumps, radiators, thermostats, oh my! It's really the only 928 forum, which is good, too.

 

Congratulations on owning the first true Porsche! Should I take it by the fact that labeled yourself a '928 pilot' that you're an aviation warrant?

 

This is key. You may look in there after you remove the old thermostat and think there's nothing there. The seal that goes behind the thermostat is actually a thin metal ring that is originally encased in rubber. When I got my car and found that it was running too hot, I did this job, and thought there was no seal at all, but in reality the rubber had all disintegrated. If you gently pry at the ring that's left, you can deform it enough to grab it. BE WARNED: If you're not careful, it will pop out like a spring and head straight for the hole that leads down to the water pump, so stuff a rag in there before you go prying.

 

It's an 82. They started using the gasket it 83, before that the rear of the thermostat sealed directly against the water bridge. So no worries there.

Most likely the thermostat needs to be replaced, just make sure the small hole is at the top of the thermostat or else it wont bleed air out of the system.

 

Good Morning Shawn, I use the term pilot as a "Term of Endearment", but was an electronics Warrant Officer i did work with Aviation and Mechanized equipment in the Army, and was rated to work on almost any electronic equipment in the Army...

My next question, is according to "The Forgotten" My 82 does not have a rear seal on the thermostat in the water bridge..does it need a front seal?? but not the back??
hat to try and put one on if it does not need it..
again thank you all for your support..
Al