Question about 2001 Yamaha YZF 600 R thunder cat

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Would a hole in the crank case cover cause to much crank case pressure

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Posted on Nov 13, 2014

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1 Answer

Would a hole in the crank case cover cause to much crankcase pressure


No, it would have the opposite effect. you would lose pressure that normally routes to the pcv hose.

Nov 13, 2014 | 2001 Yamaha YZF-R1

1 Answer

My mazda diesel fumes into the air filter and clogs it with oil.what causes this please


clean out crank case ventalation system if this is all clean and oil level is correct then carry out a compresion test to check for piston ring blow past causing excesive crank case pressure

Dec 30, 2013 | Ultraviolet Heat Shield Covers For Causes...

1 Answer

The oil dip-stick is blown out of its seat when the compressor runs


Without knowing what make or model you have, check the following:

1. Some, not all, compressor dip sticks have venting holes for the crankcase. If the vent holes are plugged or the check ball is stuck the dip stick will get forced out when the piston comes down.
2. Make sure the oil level is where it's supposed to be. Too much oil in the crankcase will cause the motor to work harder and the excess oil being splashed around the crank case can overwhelm the vents in the case or dip stick and again blow the dip stick out.
3. Worst case, you have worn or broken rings on the piston(s), a hole in a piston or a badly scored cylinder(s) and air is leaking past the piston and creating pressure in the crank case and blowing the dip stick out.

Jan 26, 2011 | Campbell Hausfeld Air Tools & Compressors

1 Answer

I HAVE A1976 SUPERGLIDE FXE AND HAVE EXCESSIVE OIL COMING OUT OF THE CRANK CASE VENT HOSE


There are a couple of reasons for that.
The simplest one is that it has been standing for a while and the oil tank has emptied into the crank case, causing increase pressure, in which case after a few minutes it should clear.
The diaphramme has stuck open and letting oil as well as vapour leave by the breather pipe.
The rings are badly worn and pressure is building up in the crank case.specialistel.jpg
It is not a good idea to route the pipe like the photo of a 1976 XLCH1000, it should flow down between the chain cover plate and the timing case.
Too much oil in the oil tank will also do that.

I hope it is the first cure and not the rings!

Jan 16, 2011 | Harley Davidson FXR Super Glide...

1 Answer

Oil in air filter wot causes this car in qustion is a jag xj8


This issue is caused by crankcase pressure issue.
Normally filtered air enters the engine, runs through the crank case and then is pulled into the intake through the PCV valve. Durning hard acceleration, the PCV valve closes (to prevent explosion of fumes in crank case and blowing valve covers and pan off) and the PCV system reverses, with fumes coming back through the filtered intake.

Usually there is minimal oil that gets back into the air cleaner.

So, when somthing goes wrong, like excessive blow by, for example, the crankcase pressure overcomes the PCV valve and intake of fumes capability, and oily starts showing up in the air filter.

Investigate the crankcase pressure and PCV system.

Oct 14, 2010 | 1998 Jaguar XJ8L

1 Answer

I juust put new valve covers on my 02 mustang gt 4.6, what would cause the oil cap to be blown off the passenger side cover?


Sounds like pressure buildup. Did the old ones have a PCV valve or some way to release crank case pressure?

Mar 14, 2010 | 2002 Ford Mustang

1 Answer

Crank bearing cap blew out on Porter cable air compressor


Your compressor is sold under various part #s depending on brand name. The link below is the breakdown for ac-0171.
http://www.devilbissparts.com/OilLubeStat%20PDF%20files/ac-0171.pdf. You will notice that there is no vent to release internal pressure. Most brands have a filler/dipstick which is also a vent. As the compressor wears there is a normal increase in crank pressure caused by pressure passing thru the rings. I have seen home made vents installed on the bearing cap. If you are creative you can make one yourself using the same cap or a metal cap (axel bearing cap) that fits the opening. A crankcase vent is a very simple device. A small hole to atmosphere with a bit of oil resistant foam behind to prevent oil from being blown out the hole. Works best when there is a vent tube about a couple of inches long to catch any oil and allowing it to run back down into crank. Remember that there is oil sloshing around inside the pump. Examine several brands of compressors for vent and try to recreate that on yours. One thing in common about vents is that they are usually located pretty high up above the crankshaft. You could also try lowering the cut-out pressure on your compressor to reduce back pressure. Good Luck on your repair.

Apr 23, 2009 | Porter Cable Air Tools & Compressors

1 Answer

The engine is making rapping noise it only has 126982km


The noise you hear along with low or no oil pressure is a sure sign that an engine bearing has failed...In most newer engines the crankshafts are so thin that once this happens, replacing a bearing without a new crankshaft is a gamble (thin walls of crank journals become egg shaped, new bearing will fail, if crank is machined, it is therefore thinner and even more prone to deforming) If you caught this very early and did not drive after it began, there is a slim chance that it will be OK after repair, but it is a gamble at best.
I'd much rather be telling you something much smaller and cheaper is wrong but the fact is that it's not.
PS: oil may be full but the bearings hold the pressure ... if failed, overall pressure drops (imagine a garden hose with a hole in it...pressure is lost at the hole and does not adequately reach the nozzle...in this case the bearing that failed is supposed to cover the hole but no longer is)

Apr 16, 2009 | 2003 Pontiac Montana

1 Answer

DVD drive/Opening Case


In the front cover of the DVD there is a very small hole. straighten out a paper clip and gently insert into hole. the Door will manually open.
The case slides off the frame. It may need a little more pressure to over come the clip pressure.

Mar 15, 2008 | Computers & Internet

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