Per Sällström

don´t missunderstand me Eric, i like to listen to you since it seems to me that you´re very experienced BUT still dont get how the plug can be in a rather good shape pumping and burning oil ????

Ofcours its better to rebuild but i am not in a situation right now that its likely to happen cause i don´t have a good place to do it and no other car, exept for the wifes :-).

And i also need to rule out ANY other possibility before a tear the engine apart and it seem to be a very common problem and not a one that you should jump in to conclusions about. Yesternight a read a bout a racer here on the forum that made a perfectly good leakdown and compressiontest and still smokes and there where discussions about clogged cats(which i dont have ofcours) or mufflers so I AM listening just dont like to tear a engine down to find no obvious errors BUT ofcours i agree with you that every seal needs to be replaced but iam not convinced that it will solve my problems. The head have been of recently(confirmed by the mechanic), is there a possible ****-up in the refitting process ??

/Best, Per

Erik - Denmark

Per,
The engine is burning oil at high revolutions, so the plugs have plenty of time to burn brun - Also the type of the plugs (heating cote) has influence here!

Per Sällström

ok Eric, that is something that i have´nt thought of...

That could explain the plugs ofcours.. well iam taking it to a mechanic tomorrow and will let you all know the verdict !!.

Thanks for now guys !

/Best , Per

Erik - Denmark

Per,
Good luck - We hope the best!
Per just a simple indication, how are your V-bay? - If dry and clean = OK
If wet and dirty - Then be suspicious and check the reason

Per Sällström

it wet but not that wet.. but i have just spoken to previous owner and he says that the car has been in and out of shops for external oil leaks in the V area and iám starting to suspect that it´s infact the high crankcase-pressure that finds its way out of old hoses in to the v.

The mechanic iám seeing tomorrow is infact the one that lifted the heads to find reasons ( to what iám not exactly shoure right now! ) for the oilleaks but i tried a simplyfied version of a catch can setup today and it´s not nice.

What would you estimate the cost for a rebuild right now ?

What do you do with the cylinders if they´re not nice or are they usually ok?

Well it´s hard to answer... you trying to find some comfort...

Should i go for som mods if rebuilding to gain some fun on the way, like stroking aso???

/Best , Per

Erik - Denmark

Per,
Don't cry before that needed - See my comments mrk.: >>

What would you estimate the cost for a rebuild right now ?
>> Hard to say, depending of many things, but minimum 1500 - 2000 US@ for the parts, to this come payment for all the works - Oh no, do it yourself, and you know what you get

What do you do with the cylinders if they´re not nice or are they usually ok?
>> They can be bored and etched, see: http://www.msi-motor-service.com/dow...ren/alu_en.pdf but only expert companies can do and new pistons cost about 300 US@ each!
If the engine is too bad better to find another from a parted car, or as I did, I bought a nice donor car in Switzerland (only 108.000 km) - That's the best I ever did, because now I have two of everything, the only problem is where to place such a car, I rented space for it on a farm

Well it´s hard to answer... you trying to find some comfort...
>> I am quite conformable, I got my Porsche problem solved, but I 'paid the ticked' - I got my car back in 1995, but I can still find something to improve.

Should I go for some mods if rebuilding to gain some fun on the way, like stroking aso???
>> No! - I mean be happy if/when the car is driving as it was meant as new

Jim bailey - 928 International

Oil mist will accumulate in the intake over time then when you make a high speed high rpm run high rpm it can get sucked up into the air flow and cause a puff of smoke . It does not mean the engine is bad or that there is necessarily excessive blow by worn rings or bad valve guide seals . The GTS baffle is installed in the sump under the engine , the louvered baffle goes on top of the block under the oil separator , nearing all of the 928 Racers have improvised added additional breathers , oil lines , catch cans to try to separate oil from the normal blow by .

Erik - Denmark

That's the one I am talking about

Per Sällström

Hi & thanks Jim, i might actually be able to sleep tonight then !!

I made this deal for all the wrong reasons, bought the car with my heart but thought it was great lookin and having own around 60 cars, 5 even racecars, i thought that i should be able to "feel" if there was life left in it, and it shoure feel like it !...

Ok, it was cheap and i should probably not be surprised that there are work left to be done but this...i have own Alfa Romeos with more miles on that never showd this "diesel"-smoke...

I hope you have a point here, even if iám in to buying most of Erics arguments right now. My mechanic seems to agree with you though and he has raced 928s.. iám meeting him tomorrow.

What do you think should cause my troubles if not wear ?, it not a extreme high rev problem, it puffs in highwayspeeds at 3000rpm !!



/best, Per

Per Sällström

Hi guys!

Still smokin around and actually trying to follow Erics suggestion about a second car i found a shut-off valve at Deveks that might help me in the mean time. Anyone know if this is a valve that just shuts off the filler line in normal driving conditions and then is open when filling up new oil ?. If this is the case...is it an "ok-thing" to put in?. sounds like the guys from Devek´s know what they´re into but they where actually away when i mailed them so that´s why i ask here instead.

I know that this doesn´t cure my engine but it might be a way to survive until the new engine is ready !

/Best, Per

Erik - Denmark

Hey Per,
Any news regarding your '8 cylinder oil pump'?

Per Sällström

Hi Eric !

just came back from my mechanic nr2 who took a look, a test drive and had one teori thats interesting. It runs rich, smokes both blue and black when hitting the accelerator and he thinks that it actually mixes the oil with a lot of fuel which leads to washed cylinders, thin oil and smoke. Now, if so, the engine may have taken serious damage but should be checked further on anyway. Iám lookin for a doner car, as you suggested, and have found one that seems priced right but it´s an S4 and my mechanic thinks it´s way to much work to transfer everything to my old body, but it would be nice though, what do you think ?.

Any comments to the rich-fuel-teori, anyone ???


/Best, Per

Dennis Wilson

Per,

Before getting another engine check (or have your mechanic check) the valve guides. This can be done by pulling the intake tubes and checking the back of the valves. If caked with oil the valve guides are leaking enough to cause the blow by and oil burning. The same thing was happening on my 78 euro. The valve guides on the 928 are extremely short and if original are prone to wearing out. The aftermarket guides are a better alloy.

Dennis

Erik - Denmark

Hey Per,
I was recommended of Kim Clausen, Porsche Centrum, Koege (Expert in 928), to buy (from Switzerland) a S2/3 and not a S4, (as your man also said) too many things to change
But first as Dennis said, find out what's the reason for your 'oil pumping'
Did you made a compression test with eventual following leak down test?
If you buy a donor car, then it is important that's good car, and with the tax system you have in Sweden (Almost no tax on cars) that a question how profitable it is - Not like Denmark where we 'buy one, and pay for three' !
The donor car I found was a well kept car, 108.000 Km with a minor traffic damage (Right front and rear fenders), but possible to test-drive
Good luck with your oil pumping project