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Discussion Starter · #1 ·
Hello..!
I´want to know that,does anyone have the same
engine noises than i have....when engine is cold it runs smoothly but when the oil(10-40w)is hot engine starts to make roughin noises.Valve clearances are ok and camshafts too and the "cups" under cams..!
Engine is 2.0 t.s 8V 135tkm on the klock..! :)is this normal..?
 
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Discussion Starter · #2 ·
Hi Mikka
I don’t have your type of engine right now, but know it from the Alfa 75 no TS and it’s not normal with the noise you describe. How is your oil pressure? It should be about 3-4 kg idling (8-900 RPM) and 4,5+ kg at 4000 kg. presuming your gauge is right reading. If your reading is much below you might have worn crank bearings. If the reading is OK, it can be a number of things; you have to listen to the engine. Have a Dealer or an Alfa specialist listen they probably know right away what’s wrong.
Good luck
Erik
 
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Discussion Starter · #3 ·
Hello Erik..!
The specialists says that you dont't have anything wrong with my engine, that it is normal and the noise isn't so bad...
And it could be only my engine that keeps that noise, but i don't like it.!
Otherwise my car runs very well...!
Oil pressures are ok. :confused:
 
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Discussion Starter · #4 ·
Hey Mikka,

perhaps you take the wrong oil. Be careful but for the alpha 155 you should take always a full synthetic oil for the engine (e.g. 10-50W Castrol or LiquiMoly).
Good Luck

Claus
 
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Discussion Starter · #5 ·
Hi
Claus is right about a fairly thick oil is best for the 8 valve engines (Alfa Nord engine) but I don't think that can explain the noises. I donøt remember whitch oil I used in my 2,0 8 valve Alfa 75 and Guilletta, but probably was Castrol 10W-40 or 15W-50 mineral oil.
If the noises are within limits it's probable the internal cylinder explations that are transmitted thru the Alloy cyl block and will not change much with thicker oil - remember how cold it is in Finland during the winter.
Alfisti regards
Erik
 
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Discussion Starter · #6 ·
Hello guys...!
I have tried 5w-40 but,somebody said that the oil is too thin ,when engine is hot..but does it lubricate better when it is thin...?
Mysterious voice anyway but i don't think that there is any mechanical damage, becuse
i have ownd it for over half year now and all the time it has keep that noise....! :confused:
 
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Discussion Starter · #7 ·
Hi Mikko
Alfa recommends 10W-40 for all 155 no matter engine version. Ask an Alfa specialist what oil is recommended in the Finish winter. Mine 2,0 16v have had 0w-40 for the first 100k km with no ill effects to it. I took over at 100k and change to 5w-40 and at 117k to 10w-60 and haven’t been able to hear any difference and oil pressure is the same and consumption is for both oils about 1 litre every 5-6k km.
I wouldn’t worry about the engine noise as long it doesn’t use more than 1 litre every 2-3k km and oil pressure is above 2 kg idling and 4 kg a 4kg RPM.
Alfisti regards
Erik
;)
 
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Discussion Starter · #9 ·
If faulty, the Timing Variator normally makes noises when the engine is cold, not hot. Have you considered it may be something simple and inexpensive like the water-pump near the end of its life? Hope you find it soon. ;)
 
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