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Newb Blowby question
Hey guys
So I went and started up my 300D today and I noticed a tiny bit of oil around the black rubber tube that feeds over to the air filter housing. I randomly decided to check for blowby, and I do see a little. In my opinion, it's not noticeable unless you're really looking for it. I'm wondering if this is anything to fret over? It's going in for A/C service tomorrow, so should I have a compression test implemented while it's in there?
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Never be ashamed to ask for help. 1985 300D 1987 300SDL 1970 Jaguar E-Type OTS 2002 Dodge Intrepid (Traded In) 2011 Ford Crown Victoria |
#2
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Most people here will probably say that they've never seen one without blowby... however if you want to be sure that there isn't a problem (in my opinion) is to do a leak down test:-
http://en.wikipedia.org/wiki/Leak-down_tester This is arguably more reliable than a compression test - but you could do one of those too if you want. But before you spend the extra cash why not post a video somewhere and ask advice from us good folks here?
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! Last edited by Stretch; 05-14-2011 at 02:28 PM. Reason: Added the video bit |
#3
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Quote:
If you had a lot more blow by there is little that can be done with the exception of an Engine overhaul. Consensus is drive your Car and be happy it is running well. Some things that have worked for some are: changing the Valve Stem Seals Soaking the Pistons in Marvel Mystery Oil or something else to loosen sticky Piston Rings (Marvel Mystery oil results sticky rings Original thread also has + response http://www.peachparts.com/shopforum/showthread.php?t=258757&highlight=Marvel ) Some have said using Synthetic Oil freed up their sticky Piston Rings after driving 200-300 miles. But, your Engine sounds like it needs none of the above stuff. I have changed my Valve Stem Seals and done the Marvel Mystery Oil soak and have not seen any noticeable difference in my Blow by; not any better. One of the main reasons I did the below because I was tired of the blow by Oil condensing in my Air Filter Housing and the U-intake Tube. Even with the mod I still have a little wetness from Oil when I check it every 6 months in the Intake but at least it stays away from the Air Filter element. Washable Air Filter and Intake Mod , With Larger Breather http://www.peachparts.com/shopforum/showthread.php?t=280376
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84 300D, 82 Volvo 244Gl Diesel |
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On a completely different note, however, I finally got around to posting pics of my dad's SDL, if anyone's interested?
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Never be ashamed to ask for help. 1985 300D 1987 300SDL 1970 Jaguar E-Type OTS 2002 Dodge Intrepid (Traded In) 2011 Ford Crown Victoria |
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Based on how you describe it, don't fret about it.
I can't remember if the seal on the oil filler cap can be changed, or whether you have to buy a whole new cap. In either event, if you have that little blowby, it's the seal that's the issue and not the wear in the motor. Fix the seal issue and don't worry about the rest right now. If you notice the blowby is noticeably worse in, say, a month or two, then possibly you have an internal issue and you might want to try one of the suggestions for a compression test, a leakdown test, or taking a shot at freeing up rings. But frankly it sounds like a non-issue to me. Relax and enjoy
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Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d “Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22 |
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__________________
1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
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Thanks for the responses everyone. I realize newbs like me must ask these questions a hundred times over, but for all you veterans out there, I'm speaking for all newbs: thanks for helping us along the way to becoming vets. Hopefully the meticulous amount of attention I pay to the car will pay off in the long run.
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Never be ashamed to ask for help. 1985 300D 1987 300SDL 1970 Jaguar E-Type OTS 2002 Dodge Intrepid (Traded In) 2011 Ford Crown Victoria |
#8
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blowby or whipped up oil mist?
My car has no appreciable blowby. The oil cap will sit there fairly benign, no smoke/gas coming up. However, pull off the cap and the oil whipped and flung around in there will make an aerosol mist that will make a real mess.
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Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (113k) 1991 350SD (206k) 1991 300D (228k) 1993 300SD (291k) 1993 300D 2.5T (338k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (265k) Past Diesels: 1983 300D (228K) 1985 300D (233K) |
#9
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#10
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When I first bought my 83 300D turbo, it was slow and smokey, always lot's of oil in the air cleaner housing. I have since adjusted the valves many times, put in new Monark nozzles, adjusted IP fuel pressure, adjusted the ALDA and boost, change the oil on schedule, drove it hard. The car is running better than ever and I noticed recently that the oil filter housing is clean and free of oil. I do not remember if there was blow-by when I bought the car but it does not have any now, oil cap sits
steady and no smoke coming out.
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#11
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When there is so much pressure in the crankcase that oil gets pushed out the dipstick tube, then you have bad blowby. I had a 351W Ford in an old Mercury that did that and I still drove it for a year and a half like that (sometimes at a buck thirty down the interstate, on bald tires, without wearing a seatbelt-I did some dumb stuff when I was younger).
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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar. 83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles 08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles 88 Jaguar XJS V12 94,xxx miles. Work in progress. |
#12
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Someone told me that Mobil 1 actually reduces leakage and smoking and that car was testament to the validity of that claim. Everyone thought I was nuts pouring synthetic into a beater with piston slap, but it did the job better than the snake oil 'no smoke' junk.
__________________
Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d “Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22 |
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