morning sickness

murt

Middle Lane Hogs
my car has a slight tap when its cold when i start it in the morning, once its warm its fine, should i worry?? i leave it run till its warm before i even drive. any idea of what it might be oil is ok just got it changed. thanks....
 
Sound like p1ssed on slap, or for the more technically minded, piston slap. Your local dealer will tell you, "they all do that sir". I can't remember the exact reason behind it but someone on here will explain in more detail. If it is piston slap it nothing to get worried about.

Alan
 
Taken from some Scoob website:

It seems a small percentage of the MY98 cars have had problems with Piston Slap after a period of 10,000 to 20,000 miles has been covered. This manifests itself as a knocking noise which is much more pronounced when the engine is cold. This should not be confused with a ticking/tappet type noise which is common on all Impreza engines , but a distinct knocking noise which is most noticed between 1,500 and 2,000 rpm. In the UK, Subaru have been resolving the problems by fitting an a completely new short engine (block, crank, pistons) , and this cures the problem completely. Some cars are apparently much worse than others, with very lightly driven cars being just as susceptible as those driven hard! All Subaru dealers should be aware of this problem, and offer to resolve (free of charge under warranty) if the problem exists. If your dealer denies all knowledge, then go to another dealer who may be more sympathetic to your cause. The work takes between 2 to 3 days to perform, and as well as running it in again, you must get your ownership document(s) updated with the new engine number. If the problem occurs on a normally aspirated engine, then a simple piston replacement can be used, instead of a whole new block.
 
its a98 sti wagon, i just had a new 2.5 bottom end put in so thers only 4500 kms on it, i sat in it till it heatad up it seems to come and go between 600 and 800 rpm,
 
Happens mine when cold too, was told exact same ........ "they all do that sir".
 
cheers i was gettin worried when i bought the car first botom end fell asunder on me hence moving up to a2.5
 
[quote author=murt link=topic=755.msg6029#msg6029 date=1163022400]
a local guy beside mei,ve found him really good so far why you ask?

[/quote]

Just curious, is he a Subaru specialist?
 
ye he builds queit allot of scoobys , its  a garage called jomo engineering i find him very helpfull , have you heard off????
 
Never heard of them before, very surprised to hear that such a newly built engine should have knock. I would get a second opinion from some independent Specialist to see what they think. I hope it is not a major problem, who mapped the car after the rebuild?
 
gonna talk to mechanic first , no harm of second opinion i suppose, you goimg to rolling road day ne xt wek
 
Westward Eng???? :lol: :lol: :lol: :lol: MMM how much for an oil change...??? e11237 mmmmm Good Deal.......... :lol: :lol: All i have to say. No Car of mine would be worked on by him anyway.. :angry: :angry: :angry:
 
But in saying that i would be talking to the builder??? Was the block a complete brand new factory un-touched block????
 
[quote author=davelegacy link=topic=755.msg6055#msg6055 date=1163026618]
But in saying that i would be talking to the builder??? Was the block a complete brand new factory un-touched block????
[/quote]

yes i seen it when it came in, spanky new in the box
 
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