AtlaDas

Hi all,

I'm not new to the site because I already used it a lot during the restore of my Porsche, but now I have a question and couldn't find the right topic for it.

I'm working on a Porsche 928s 1982 automatic since August last year. It's a hobby and spend time on it when it suits (which is less than I want :-))

The car was rolling when I bought it, but it sounded nothing like the V8 should sound, so I dismantled it and replaced the spark plugs, injectors and the manifold (there were revised manifolds with the buy).
Didn't do the timing belt because it was done by the previous owner.
I'm assembling him back and during the reconnection of the radiator I came to a stop ...
My radiator has 4 connections (except for the big cooling water connections). The passenger side has the automatic transmission fluid cooling and during reading different threads I learned that the other connections are for the oil cooling.
But the strange part is that I don't recall disconnecting these lines and also the block doesn't have connections to connect it to (or are shortcut by the previous owner).

So my question is: Does this model has oil cooling throught the radiator and don't I have the original radiator?
Or did the previous owner cheated and do I need lines to the radiator for the oil.

If it is the last option: can someone explain where the lines need to come, because I read a lot of different opinions about this and confused me.

Thanks in advance,
Dave

Imo000

Looks like that radiator is from a different year 928. The connections are near the oil filter, if you have one. If you don't have one, don't worry about it.

FredR

The oil cooler lines run to/from the side of the oil filter to the driver's side of the radiator - was under the impression that all earlier models cooled engine oil this way- I defer to those more knowledgeable on your model year. If the bosses are plugged then the cooler was never there when you purchased the car.

The transmission is cooled on the passenger side of the radiator and as I am aware the cooler lines should be connected to the radiator.

Maybe someone thinks in your soggy climate they did not need coolers?

Oh- and when you say the previous owner did the timing belt- when was this? Timing belts do not like to be left standing still for long periods of time- if the belt was new a few years ago you would do well to replace it- not so critical with your motor as it is a non interference engine I presume.

Rgds

Fred

mark kibort

you dont need the coolers.. I raced mine for many years without one. the left side is used for transmission cooler. driver side (US) used for oil cooler.... all those ports on the block are sealed off on your motor. you could install one, but what for.

James Bailey

78-79 had coolers , 80-84 USA spec did not, Euro S models had them.....so perhaps you have a none S model and one was never fitted.... With a 55MPH speed limit and an 85 MPH speedometer there was little need for a cooler in 1980 in the USA.

AtlaDas

According to my VIN, I should have a S model :-)

But I don't see the connections next to my oil filter ... so if the euro S model had one ... I have a special one ;-).

But appearently I don't need to worry a lot about it. So I'm going to leave it like that for now and keep a watch on the temperature if some day the time comes if I can take it out of the garage.

@Fred: No, the car was not out of driving for years

Thanks all for the quick replies !

FredR

Sounds as though you may have a US spec model. If you post the VIN number then some kind soul may be able to advise you what Porsche thought it was when they sold it.

If it has been butchered previously then you might want to consider whether you want to keep it that way.

Rgds

Fred

hacker-pschorr

A lot can happen in 30+ years.

Back around 93/94 the radiator was pierced in my 79 by the headlight arm when the c-clip fell off.

Fixed at the dealer, they installed a radiator without coolers since that arrangement superseded what the 79 came with from the factory.

AtlaDas

You make me doubting myself. I'm going to take a look to the oil filter area this evening.

My vin is: WP0ZZZ92ZCS840839

Thanks

Kiln_Red

VIN suggests it's a Euro. M28/12

Wisconsin Joe

Lots of things can happen in 30+ years.

The radiator may not be original.

The engine may not be original.

Se if you can find the engine number. It's on the top of the block, at the front, sort of under the water bridge (the pipe that goes across the front of the motor).

Imo000

You will not notice any problems with the engine temperature. That cooler is for extreme conditions that you would have to work really hard to duplicate.

mark kibort

very extreme.... and its not that effective of a cooler anyway. very surprising.... kind of an afterthought type design. hmm " lets use the hot radiator that is near 180 degrees to cool the oil that is near 220 degrees on a hot day." pretty stupid! dont worry about it or give it a second thought. ive raced the 84S design for years and never had a problem. oil temps always get in the 250F range on a 100 degree day racing. the oil cooler that i installed with the 5 liter, didnt change things much.

Rich9928p

My 1979 928s do not have engine oil cooler lines.

AtlaDas

Double checked the oil filter area, I don't see bolts there.
And found the block number: M28/12. So that clears that out ... phew ;-)

I'm going to leave it as it is now.

Started it up a while ago: he ran smooth, but the temperature went up quite quick. But I noticed that one cooler pipe was warm and the other was cold, so I next time when he's cold again I'm going to check if I have circulation in my water.
So maybe I can take it apart again for a water pump :-)

Bought it cheap and wanted a project ... I have one. Luckely I enjoy working on it