4.6l problem

mb93gtconv · 12-24-2009

ok,i just bought this 01 gt about a month ago.it has 112,000 on it.it runs good and all but here in the last week or so i am noticing it has started burning oil out the tailpipes.if i let it idle for a little bit it smokes like crazy. the only thing i have done is i put a mac prochamber on it with mil eliminators.
i read that 4.6's with over 100k have valve guide seal problems.is this true?? anyone else run into this problem?? i changed the pcv thinking it may be stuck but no luck.please help,i know nothing about the 4.6 motors.i am a 5.0 guy.haha.

thanks

JROC · 12-24-2009

The only Modulars that I know of that are know to develop oil burning issues as a common problem are the early 2v's that came in 91-97 Lincoln Town Cars and Ford Crown Vics I believe. I'm no expert though, and thats just what I've heard. I've owned a couple of Modular Mustangs,(both 2v and 4v) and neither ever seemed to burn any noticable oil, and my parents own a couple of 2v Modular vehicles with high mileage and they don't burn oil either.

Hopefully it is a problem with your valve seals, and not with your piston rings.

I use to own a 95 Integra GSR that burnt oil like crazy, and it had busted piston rings in atleast one cylinder. That motor had a cylinder go out at 124,000. Ofcourse that car has the popular B18C1 Honda motor.

Beernut · 12-25-2009

A lot depends on how ruff the 112K were before you bought the car.. Also depends on IF the car was ever parked for a "extended" amount of time.

BEST way to tell is to do a compression leakdown test. Unless you want to pull the heads off lol lol.. A regular compression test can be "misleading" . IF it passes a leakdown test you know the rings are good and its a seal/guide issue.

mb93gtconv · 12-25-2009

Quote:

Originally Posted by red89coupe

A lot depends on how ruff the 112K were before you bought the car.. Also depends on IF the car was ever parked for a "extended" amount of time.

BEST way to tell is to do a compression leakdown test. Unless you want to pull the heads off lol lol.. A regular compression test can be "misleading" . IF it passes a leakdown test you know the rings are good and its a seal/guide issue.

that was the next thing for me to test.i have to wait till the snow melts first.don't think it has been abused to bad.the car is really clean.maybe it has the wrong weight oil in it or something.will know more after the leakdown test is done.

12-24-2009	#1 (permalink)
mb93gtconv mustang junkie Real Name: MARK Join Date: Jan 2007 Location: Fountain,co Posts: 437 iTrader: (1) Friends: (4) Last Online: 07-04-2014 02:02 PM Time Spent Online: 1 Day 22 Hours 37 Minutes 39 Seconds My Album's: mb93gtconv's album My Garage: mb93gtconv's Garage Thanks: 0 Thanked 2 Times in 2 Posts	4.6l problem ok,i just bought this 01 gt about a month ago.it has 112,000 on it.it runs good and all but here in the last week or so i am noticing it has started burning oil out the tailpipes.if i let it idle for a little bit it smokes like crazy. the only thing i have done is i put a mac prochamber on it with mil eliminators. i read that 4.6's with over 100k have valve guide seal problems.is this true?? anyone else run into this problem?? i changed the pcv thinking it may be stuck but no luck.please help,i know nothing about the 4.6 motors.i am a 5.0 guy.haha. thanks __________________ 2008 Dodge Charger SRT8 69 dodge charger r/t 440,auto.currently under restoration(again) 41 dodge luxory liner.318/auto

12-24-2009	#2 (permalink)
JROC SCIENCE DAMN YOU!!! Join Date: Mar 2007 Location: South Carolina Posts: 314 iTrader: (0) Friends: (2) Last Online: 01-11-2014 08:11 PM Time Spent Online: 1 Day 20 Hours 21 Minutes 54 Seconds My Album's: JROC's album My Garage: JROC's Garage Thanks: 0 Thanked 0 Times in 0 Posts	Re: 4.6l problem The only Modulars that I know of that are know to develop oil burning issues as a common problem are the early 2v's that came in 91-97 Lincoln Town Cars and Ford Crown Vics I believe. I'm no expert though, and thats just what I've heard. I've owned a couple of Modular Mustangs,(both 2v and 4v) and neither ever seemed to burn any noticable oil, and my parents own a couple of 2v Modular vehicles with high mileage and they don't burn oil either. Hopefully it is a problem with your valve seals, and not with your piston rings. I use to own a 95 Integra GSR that burnt oil like crazy, and it had busted piston rings in atleast one cylinder. That motor had a cylinder go out at 124,000. Ofcourse that car has the popular B18C1 Honda motor. __________________ Born: 9/2/02 # 2512 of 8394 Mods: Magnaflow Catback, MAC Prochamber, Steeda Tri-Ax, K&N FIPK, 2.93" upper pulley, MM FLSFC, MM K-Member Brace, MM Coilovers, Complete Delrin and Aluminum IRS Bushings, Billetflow IRS Brace, etc. IROC FTW!

12-25-2009	#3 (permalink)
Beernut A.K.A red89coupe Real Name: Jayson Join Date: Aug 2006 Location: back in the big O Posts: 2,280 iTrader: (3) Friends: (8) Willy Wonka Chocolate Factory Take Over Champion! Mario Bros Pipe Panic Champion! Assault Paintball Champion! Last Online: 03-07-2018 04:23 PM Time Spent Online: 1 Week 2 Days 8 Hours 53 Minutes 46 Seconds My Album's: Beernut's album Thanks: 0 Thanked 2 Times in 2 Posts	Re: 4.6l problem A lot depends on how ruff the 112K were before you bought the car.. Also depends on IF the car was ever parked for a "extended" amount of time. BEST way to tell is to do a compression leakdown test. Unless you want to pull the heads off lol lol.. A regular compression test can be "misleading" . IF it passes a leakdown test you know the rings are good and its a seal/guide issue. __________________ NEVER do business with Sam Rivera AKA Sam Wilson of Rivera Race Chassis. Paid 2800 to put car together. NO work was done, never gave back my turbo kit. Now I see old adds of my parts being sold on craigslist while car was at his shop.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
little problem	fr50089	5.0 Mustang	20	06-11-2009 09:55 PM
about that problem	svtsilversnake	Engine Talk	3	10-04-2007 12:09 PM
has anyone had this problem	svtsilversnake	Engine Talk	13	10-02-2007 08:12 PM
I have a problem	BB90GT	5.0 Mustang	18	04-20-2007 09:42 AM
Next problem	Ghostang99	5.0 Mustang	12	09-19-2006 03:43 PM

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