| Author |
Message |
Mark Eberhardt (Me_k)
Member
Username: Me_k
Post Number: 813
Registered: 5-2002
| | Posted on Monday, October 27, 2003 - 6:50 pm: | |
I like to test the engine warm, but those number look fine for a cold engine. Your oil could still be coming from worn guides, a pluged vent or your turbo. |
Mike (Adesalos)
New member
Username: Adesalos
Post Number: 46
Registered: 3-2003
| | Posted on Monday, October 27, 2003 - 12:22 pm: | |
What about a leak down test?
I heard that a compression test isn't as much of a truth teller than a leakdown test...
Any results? |
Rick Oliver (Ooisdfa)
New member
Username: Ooisdfa
Post Number: 14
Registered: 10-2003
| | Posted on Monday, October 27, 2003 - 9:42 am: | |
Elevation. Something like 700 ft. |
Mike Procopio (Pupz308)
Member
Username: Pupz308
Post Number: 610
Registered: 10-2002
| | Posted on Monday, October 27, 2003 - 9:14 am: | |
On each bank, for pre and post oil, take the difference in the max and the min cylinders. This is one useful metric.
Also figure this difference a percentage of the min cylinder--this shows the variance as a maximum percentage, another useful metric.
Others on the thread can interpret this variance and comment...
What elevation are you at?
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Rick Oliver (Ooisdfa)
New member
Username: Ooisdfa
Post Number: 13
Registered: 10-2003
| | Posted on Monday, October 27, 2003 - 8:07 am: | |
I did the compression test this weekend and not sure what to make of the results. The front bank of cylinders I got 168, 173, 157, 167 on the rear bank I have 170, 168, 162, 162. Keep in mind that this without warming up the engine. I then added a few drops of oil to each cylinder and got, in the same order as above, 182,198,169,189 and 187,184,170,204 any ideas out there on these results? I am going to repeat the test tonight and see if I get consistant results.
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Rick Oliver (Ooisdfa)
New member
Username: Ooisdfa
Post Number: 12
Registered: 10-2003
| | Posted on Friday, October 24, 2003 - 7:58 am: | |
Verell,
Thanks for the comments and suggestion. I am ready to do the compression test. I will have the results by Monday. It was suggestions and comments like yours, that led me to believe without a test, I should overhaul the engine. I pretty much have my mind made up. I'm doing the test for peace of mind. I don't know if it related to anything but I noticed a pool of coolant resting on the top of my heads. Is it there from a previous problem that's been fix or and existing one? I'm sure I find out. I am curious as to all that I'll find as I dive deaper into the engine? I have a feeling it has a lot in store for me.
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MICHAEL MORETT (Thecarreaper)
New member
Username: Thecarreaper
Post Number: 40
Registered: 9-2003
| | Posted on Thursday, October 23, 2003 - 3:44 pm: | |
wow! Verell, great links!!!!!!! |
Verell Boaen (Verell)
Intermediate Member
Username: Verell
Post Number: 1298
Registered: 5-2001
| | Posted on Thursday, October 23, 2003 - 12:02 pm: | |
So you're 'assuming' you're going to need a rebuild & doing contingency planning.
Thought maybe you'd gotten some new info that hsdn't been posted in either place.
You've already seen my diagnosis suggestions in the other thread. |
Rick Oliver (Ooisdfa)
New member
Username: Ooisdfa
Post Number: 11
Registered: 10-2003
| | Posted on Thursday, October 23, 2003 - 11:57 am: | |
(How did you go from your last post in the "308 turbo oil spray in exhaust?" thread to here?)
Easy if I understand your question. I have a new (replacement)turbo that, from what I gather, is pointing out a sick engine. Do to poor idle, smoke and oil leaking and spraying out the exhaust. Sounds like an overhaul to me(rings, valves, headgasket or pistons?) . I am still in the diagnos stage so if you have any ideas I'd love to hear them. I hope to have the results of my compression test by Monday. |
Verell Boaen (Verell)
Intermediate Member
Username: Verell
Post Number: 1290
Registered: 5-2001
| | Posted on Wednesday, October 22, 2003 - 4:27 pm: | |
Search the "Technical Q&A Archives" for
"engine removal" rebuild .
There are even some threads with pix of engines being pulled. (No, they don't drop)
If you don't already have both the factory service manual & a factory parts catalog for your model, best to get copies of them(see below).
BTW, the Ferrari service manuals assume you're a very experienced & Ferrari trained mechanic that just needs a reference for detailed specs, etc.
It's nowhere near the kind of a detailed step by step book that the big3 & japanese car mfg. service manuals are.
CAUTIONARY NOTE:
Unless you are a very experienced mechanic, better get a couple of very good books on engine rebuilding, then consider very very carefully whether or not you're up to rebuilding your own engine. The consequence of blowing a rebuild is a ~$10,000 lump of scrap metal. If you haven't successfully rebuilt several engines, then reconsider a 2nd time.
BTW, how did you go from your last post in the "308 turbo oil spray in exhaust?" thread to here?
---------------------------------------------
Here are some pointers to other online resources that you'll probably find useful:
'Online Service Manual' - http://www.cameragear.com/ec/
308 GTB Register TechTips - http://www.r-design.net/308/index_e.html
Ferrari Club of America:Northwest Region Site: FerrariFAQ - http://www.ferrariclub.com/faq/
(Click on Ferrari FAQ & scroll down)
FerrariList.com:
DIY and Mechnical information and instructions - http://www.ferrarilist.com/?query=docs&action=catlist&cat=5
Forum: Technical/DIY - http://www.ferrarilist.com/forum/list.php?f=3
Also the FerrariList archives are searchable.
Another, quite new, forum is: http://www.ferrari-talk.com/
Ferrari 308 FAQ - http://home.att.net/~ferrari/308faq1.htm
Technical Articles and Writings by Tony Palladino - http://www.modena-motors.com/Technical%20Articles.htm
SERVICE & PARTS MANUALS, SPECS & SERVICE BULLETINS:
Private Ferrari Document Collection - http://ferrari.jenkins.org/books/
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Rick Oliver (Ooisdfa)
New member
Username: Ooisdfa
Post Number: 8
Registered: 10-2003
| | Posted on Wednesday, October 22, 2003 - 3:27 pm: | |
Does anyone know of an 308 engine removal or overhaul thread? Any reference material would be helpful. How does one remove a 308 engine? Drop or pluck? I suspect I need a ring, valves, gaskets... you know the works! |