| Author |
Message |
ashley bradley (Ash232)
New member
Username: Ash232
Post Number: 5
Registered: 1-2003
| | Posted on Thursday, January 23, 2003 - 11:51 am: | |
hi andrew
how would you surgest that we check this out
|
Andrew A. Illes (Andyilles)
New member
Username: Andyilles
Post Number: 2
Registered: 10-2002
| | Posted on Wednesday, January 22, 2003 - 7:04 pm: | |
Ashley...
Hate to say this, but you need to consider broken 2nd piston rings. You'll still get good compresson and leakdown rates... but still pump all kinds of oil/etc out of the crankcase.
|
ashley bradley (Ash232)
New member
Username: Ash232
Post Number: 3
Registered: 1-2003
| | Posted on Sunday, January 19, 2003 - 5:51 am: | |
If any more information please reply thank you all Ashley. |
Michael N. (Man90tr)
Member
Username: Man90tr
Post Number: 749
Registered: 4-2001
| | Posted on Saturday, January 18, 2003 - 12:20 pm: | |
Ashely,
Tell us exactly the procedure you use to add oil to your engine. More specifically, how do you check your oil levels and decide its time to add a quart or two?
Michael |
matt (Matthewmag)
New member
Username: Matthewmag
Post Number: 10
Registered: 11-2002
| | Posted on Saturday, January 18, 2003 - 10:12 am: | |
ashley, imo there really aren't that many problems that can cause the symptoms you are describing. I think that they have all been covered in the replies here - namely:
1. too much oil in the crank-case
2. blocked breather system
3. excessive blow-by past the pistons
(best checked in that order too)
....and the problem definitely has nothing to do with oil pressure.
as jrv says, there are pleny of people who mistakenly think that putting too much oil in has no consequences. It's worth noting that there are different length dipsticks and different dipstick tubes on different 308 models - unlikely that the wrong dipstick tube has got on to the car (you'd have to modify one to fit!) but it is just possible that it has the wrong dipstick. Question: how much did you put in when you changed the oil?
Blocked breather system can be checked by the method paul described - venting into a catch tank is a good idea if you do this. It's a simple breather system though and easy to make sure it's all clear.
but what exactly did they check at the garage? did they do a compression test or a cylinder leakage test? Although this could be relevant, if the problem is serious, any decent garage should be able to tell if there is a lot of blow-by by simply feeling the pressure at the breather, dipstick tube, and oil filler - and having a sniff of the gasses in the crank-case. i think that i'd go as far as saying it is one of the above 3 problems...... Having said that, how serious is the problem? You will get a little oil condensing in the filterbox on a worn engine - if there's oil coming out of the top of the dipstick tube, that sounds like a fair bit of crank-case pressure - although it's also worth asking if the o-ring at the top of the dipstick tube is present.
|
Jeff Edison (Euro308guy)
Junior Member
Username: Euro308guy
Post Number: 162
Registered: 7-2002
| | Posted on Saturday, January 18, 2003 - 8:44 am: | |
interesting thread. I'm following. |
JRV (Jrvall)
Member
Username: Jrvall
Post Number: 611
Registered: 11-2002
| | Posted on Saturday, January 18, 2003 - 7:54 am: | |
>>and it says that the oil pressure is adjustable by means of the valve sutuated on the crankcase front cover <<
1) Oil Pressure has No Relation to the problem you describe, crankcase pressure is NOT oil pressure
2)Don't touch that adjustable pressure valve
3)problem sounds like too much oil in the engine (actually far more common than one would think)
or
4)crankcase vent system plugged (doesn't sound like this problem because the seals will blow out in this case) |
Paul Sloan (Sloan83qv)
Member
Username: Sloan83qv
Post Number: 461
Registered: 3-2001
| | Posted on Saturday, January 18, 2003 - 7:47 am: | |
Disconnect the Blow by setup and vent naturally then see if problem continiues. How much presure is being vented by each bank (valve cover)? |
ashley bradley (Ash232)
New member
Username: Ash232
Post Number: 2
Registered: 1-2003
| | Posted on Saturday, January 18, 2003 - 7:13 am: | |
The car has 34.000 and the engine was tested at the garage all was ok it has had the problem for
about a year and runs ok i have look in the book and it says that the oil pressure is adjustable by means of the valve sutuated on the crankcase front cover but which way is it to decrease the the pressure. i live in leicester thanks for the reply ashley |
matt (Matthewmag)
New member
Username: Matthewmag
Post Number: 9
Registered: 11-2002
| | Posted on Saturday, January 18, 2003 - 6:29 am: | |
ashley, that doesn't sound good. assuming that the oil level is roughly ok, from your description it sounds like you're getting crank case pressurisation - and imo you're going to want to do a cylinder leak test before anything else really. You could carefully remove the oil filler cap with the engine running and feel with your hand if there is excessive pressure but a leak test is going to tell you a lot more.......
How many miles has the engine done? Has this problem appeared suddenly? how long have you had the car? whereabouts are you in the uk? i might know someone who can help. A leak test is pretty quick and easy but without wishing to be pessimistic, it sounds like you should at least be prepared for an expensive repair. |
ashley bradley (Ash232)
New member
Username: Ash232
Post Number: 1
Registered: 1-2003
| | Posted on Saturday, January 18, 2003 - 4:24 am: | |
Hi i have a problem with my mondial Qv. Oil comes out of the dipstick and in to the air filterbox i have cleand the blow-by system out and put in different grades of oil as 10w50 and 15w40 the oil pressare seems ok at all times and runs ok i hope some one can help me. |