engine smoke - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Cars and PAG Vehicles > Ford Crown Victoria | Mercury Marauder | Grand Marquis | P71
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto EscrowInsurance

Ford Crown Victoria | Mercury Marauder | Grand Marquis | P71 Forum for discussion of the Ford Crown Victoria, Mercury Marauder, Mercury Grand Marquis and P71.

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 07-18-2007, 18:36   #1 (permalink)
Registered User
 
Join Date: Jul 2007
Posts: 1
engine smoke

i have a 1995 crown vic 4.6 romeo. it smokes on start up and acceleration the smoke color is blue and smells like oil it only uses approx 1 litre of oil in 5000klm.i have read that these cars with higher milage have valve seal issues.it has 208000klm on the engine it starts and runs great lots of power very little blow-by and the oil remains very clean between oil changes.do you think this could be a valve seal issue???
ofinterest is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 07-19-2007, 01:59   #2 (permalink)
Fire/Rescue
 
rescue76's Avatar
 
Join Date: May 2007
Location: Corbin Ky
Age: 32
Posts: 29
Re: engine smoke

Every oil change I put in a quart of lucas oil...does wonders for leaky valves.
rescue76 is offline   Reply With Quote
Old 07-19-2007, 10:17   #3 (permalink)
Registered User
 
dryelf327's Avatar
 
Join Date: Sep 2006
Location: Houston
Posts: 105
Re: engine smoke

The 92-95 4.6s were notorious for leaky valves. You're only burning approximately 1 quart per oil change and everything looks clean and good when you change it, I say don't sweat it and keep driving her. With the mileage you have (206k km = approx 130k miles) you're not losing too much oil in between changes. Just continue to monitor it.
__________________
My Fords:
'98 Crown Vic LX
-167k miles and counting. Still used as daily driver.

'99 Crown Vic Police Interceptor
-Completed full PI swap
-Marauder Airbox & 80mm MAF
-'04 CVPI Ziptube
-ADTR ported plenum
-Steeda Intake Spacer
-BOC tune
-J-Mod tranny
dryelf327 is offline   Reply With Quote
Old 07-19-2007, 20:27   #4 (permalink)
Registered User
 
RickMN's Avatar
 
Join Date: Jul 2007
Posts: 230
Re: engine smoke

If the oil is only on start-up, that points to valve stem seals rather than worn valve guides. Here's the reason--when valve stem seals age, they crack. Any oil that's left on the top of the valve at shutdown flows through those cracks and down the valve guides. Sure, the guides might be worn a little, but if the valve stem seals weren't cracked, they would do what they're designed to do--seal the valve stem. Now, having said all that, you may still have a case of bad valve guides. You're getting blue smoke on start up because the cat converter hasn't warmed up enough to burn off that oil. If the valve guides are worn to the point where engine vacuum is sucking oil down the guide, that might not show up on a warm because the converter is hot enough to burn it off. On the flip side, all that extra oil would cause your converter to run hotter than usual. And it would result in even lower post cat O2 sensor readings because the extra burn off would use up all the available oxygen in the exhaust stream. Bottom line, only a compression test can tell you if you have worn guides. You'd have to do the test at least twice to see if the valves are wiggling in their guides. Valve stem seals are cheap and the job isn't too hard.
__________________
I'm a retired ASE Master/L-1 Technician. I still keep current with the latest automotive technology. Visit my blog for cool articles and TSB's: http://www.ricksfreeautorepairadvice.com/
RickMN is offline   Reply With Quote
Old 07-20-2007, 23:03   #5 (permalink)
Registered User
 
Nathan in MN's Avatar
 
Join Date: Feb 2006
Location: Corcoran, MN
Age: 26
Posts: 283
Re: engine smoke

Yep, the early 4.6s develop bad valve seals after awhile...it's pretty much inevitable. For the trouble and expense of putting in new seals, you can put an awful lot of oil through it, so I'd say just let it smoke a little. Won't hurt anything, and it sounds like the oil consumption is low enough that you don't even need to worry about topping it off all the time (not to say that you shouldn't keep an eye on it, but you ought to do that whether it's consuming oil or not).
__________________

1989 Ford Crown Victoria Police Interceptor
2bbl Carbureted 351W V8, ported and polished E7TE heads, Edelbrock cam
AOD Transmission with B&M Shift Kit
3.55:1 Positraction Rear Axle
Visit My Car Domain Account Here Updated 1/27/07!
Nathan in MN is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Cars and PAG Vehicles > Ford Crown Victoria | Mercury Marauder | Grand Marquis | P71



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 20:34.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.