4.6 motor problems HELP!!!! please - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 11-30-2006, 06:34 PM   #1
Registered User
Newbie
 
Join Date: Nov 2006
Region: Texas
Posts: 1
4.6 motor problems HELP!!!! please

ya so my car has this bad knocking sound and it gets loud around 2200 rpms or just when iam at a constant speed, so i took it to get looked at and they said the rod is bad in piston 4 .....they said they could patch it and i was wandering what that means???? also they said they could rebuild my motor but i would like to know if i can put in a bigger motor in it and how hard would it be to put a Cobra motor in it???? or should i just drive it tell it just doesnt work ???also if you know anything on replacing the rod and piston how hard is it for me to do it myself? Thanks
taustin is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-30-2006, 07:00 PM   #2
Legacy Member
Legacy
 
Kiljosh's Avatar
 
Join Date: Oct 2004
Region: Pennsylvania
Posts: 1,282
Send a message via AIM to Kiljosh
Re: 4.6 motor problems HELP!!!! please

Dont quote me, but I think a cobra motor has the same block just differnt heads and timing chain setup. They are DOHC instead of SOHC.

You could probrobly find a cobra topend but after that and the bottom end rebuild it will cost alot.

I wouldn't really try to replace a rod bearing if you aren't going to do it yourself. And its very hard, you have to have special tools and measure incredibly small clearances.

Look for a whole cobra motor, or else just a refurbished GT motor.
__________________
Kiljosh is offline   Reply With Quote
Old 11-30-2006, 07:31 PM   #3
Legacy Member
Legacy
 
Thomas91169's Avatar
 
Join Date: Sep 2003
Region: California
Posts: 2,280
Send a message via AIM to Thomas91169
Re: 4.6 motor problems HELP!!!! please

I would go with a reman GT motor for the cheapest route.

If youre looking to mod, id get a mod5.0 bottom end and take the motor out yourself and strip it down to just the block all yourself and then take the new bottom end rotating assembly (Crank, Rods, Pistons) to a engine shop and have it all installed and balanced and whatnot professionally.
__________________
-Thomas-

1998 Eclipse GST Spyder - 14b turbo | 3" Catback | Evo8 BoV | 170fwhp if that

2003 Redfire Cobra - 448whp/435wtq - Sold
Thomas91169 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-30-2007, 12:02 AM   #4
DSQ
Registered User
Newbie
 
Join Date: Jan 2007
Posts: 9
Re: 4.6 motor problems HELP!!!! please

did you let your 17 yr old son drive it.? I did. ...besides that, I have a 2000 saleen 4.6l at 28000 mls and just out of warr. the eng blew. called ford dealer and first words were, is it the #8 cylinder.? seems it has happened more than once. the #8 exploded and took cyl wall with it. I ordered new block yr 2003, $3200.00 and saleen sc, $3400.00 also gears,bearings and install. everything done in local shop was $11000.00. like i said this was in 2003-2004 and prices have risen a little. its a toss-up as to rebuild to save a little or go new w/warr. just as a note, i'm selling mine if interested, opting for much larger eng/hp etc. 25000 mls on engine/sc. 4.6L if interested pm me.
DSQ is offline   Reply With Quote
Old 01-30-2007, 06:27 AM   #5
Legacy Member
Legacy
 
MonteCitan's Avatar
 
Join Date: Aug 2004
Region: California
Posts: 2,506
Send a message via AIM to MonteCitan
Re: 4.6 motor problems HELP!!!! please

by "patching it" they mean remove just that piston and rod, replace that and the bearings for that, then put it back together..

Honestly that would work for 95% of cars on the road, but it depends on how hard you drive your car... and whether or not the block was damaged at all...
__________________
2012 IS F Blue IS F Sport
2006 Mustang V6 wannabe
MonteCitan is offline   Reply With Quote
Old 01-30-2007, 06:28 AM   #6
Legacy Member
Legacy
 
MonteCitan's Avatar
 
Join Date: Aug 2004
Region: California
Posts: 2,506
Send a message via AIM to MonteCitan
Re: 4.6 motor problems HELP!!!! please

Also, it might be worth listening around the valve cover... you could have a broken spring that would make a pretty damn loud knocking sound... how many miles on the car?
__________________
2012 IS F Blue IS F Sport
2006 Mustang V6 wannabe
MonteCitan is offline   Reply With Quote
Old 02-28-2007, 10:11 AM   #7
Registered User
Newbie
 
Join Date: Feb 2007
Posts: 2
Re: 4.6 motor problems HELP!!!! please

We just found out the bad news about our 01 4.6 gt, noise in and around the valve cover starts at about 2,000 RPM's, the shop indicated that it would be best to buy a motor vice having tear it down etc, much cheaper. Wasn't ready for this bad news since i am restoring an 72 Nova and 79 TRANS-AM. Not sure which way i'll go with this mustang.
CAKID49 is offline   Reply With Quote
Old 02-28-2007, 10:31 AM   #8
Legacy Member
Legacy
 
MonteCitan's Avatar
 
Join Date: Aug 2004
Region: California
Posts: 2,506
Send a message via AIM to MonteCitan
Re: 4.6 motor problems HELP!!!! please

Quote:
Originally Posted by CAKID49 View Post
We just found out the bad news about our 01 4.6 gt, noise in and around the valve cover starts at about 2,000 RPM's, the shop indicated that it would be best to buy a motor vice having tear it down etc, much cheaper. Wasn't ready for this bad news since i am restoring an 72 Nova and 79 TRANS-AM. Not sure which way i'll go with this mustang.
I'd be willing to take it off your hands for you :pnoid:

There's a TSB out about this noise, heard most from the fenderwells outside of the car with the hood closed, with the hood open and a stethoscope it can be heard around the valve covers, I had this issue with my 02 GT... it appareantly does not affect performance or longevity, but to cure the noise they had a cylinder head replacement kit, with one or both heads..

With the new heads on my 02 GT, the noise was gone ... if that helps
__________________
2012 IS F Blue IS F Sport
2006 Mustang V6 wannabe
MonteCitan is offline   Reply With Quote
Old 02-28-2007, 05:15 PM   #9
Registered Member
Regular
 
bullitt482's Avatar
 
Join Date: Apr 2006
Region: Mississippi
Posts: 1,106
Re: 4.6 motor problems HELP!!!! please

Cobra blocks and GT blocks are different. 96-99 and some 01 Cobras blocks were made by Teksid, a Ferrari block maker. They were aluminum with steel sleeves and with aftermarket rods/pistons/crank they're good for 750 or so hp. The GT blocks are just typical iron blocks and are only good for 500 ish hp.
__________________
01 Bullitt
bullitt482 is offline   Reply With Quote
Old 02-28-2007, 05:16 PM   #10
Registered Member
Regular
 
bullitt482's Avatar
 
Join Date: Apr 2006
Region: Mississippi
Posts: 1,106
Re: 4.6 motor problems HELP!!!! please

Oh, and as far as the thread topic goes, :hmm: :hmm:
__________________
01 Bullitt
bullitt482 is offline   Reply With Quote
Old 02-28-2007, 11:54 PM   #11
Registered Member
Regular
 
1234's Avatar
 
Join Date: Feb 2007
Region: Missouri
Posts: 1,292
Re: 4.6 motor problems HELP!!!! please

Quote:
Originally Posted by DSQ View Post
did you let your 17 yr old son drive it.? I did. ...besides that, I have a 2000 saleen 4.6l at 28000 mls and just out of warr. the eng blew. called ford dealer and first words were, is it the #8 cylinder.? seems it has happened more than once. the #8 exploded and took cyl wall with it. I ordered new block yr 2003, $3200.00 and saleen sc, $3400.00 also gears,bearings and install. everything done in local shop was $11000.00. like i said this was in 2003-2004 and prices have risen a little. its a toss-up as to rebuild to save a little or go new w/warr. just as a note, i'm selling mine if interested, opting for much larger eng/hp etc. 25000 mls on engine/sc. 4.6L if interested pm me.
I think they over charged you
__________________
03 GT Charcoal Silver Metallic - Stolen
1234 is offline   Reply With Quote
Old 02-28-2007, 11:55 PM   #12
Registered Member
Regular
 
1234's Avatar
 
Join Date: Feb 2007
Region: Missouri
Posts: 1,292
Re: 4.6 motor problems HELP!!!! please

Quote:
Originally Posted by bullitt482 View Post
Cobra blocks and GT blocks are different. 96-99 and some 01 Cobras blocks were made by Teksid, a Ferrari block maker. They were aluminum with steel sleeves and with aftermarket rods/pistons/crank they're good for 750 or so hp. The GT blocks are just typical iron blocks and are only good for 500 ish hp.
That would be 96-98 in 99 they changed who made the block
__________________
03 GT Charcoal Silver Metallic - Stolen
1234 is offline   Reply With Quote
Old 03-01-2007, 08:50 AM   #13
Registered User
Newbie
 
Join Date: Feb 2007
Posts: 2
Re: 4.6 motor problems HELP!!!! please

Unfortunately this 01 GT only has 29,000 miles, garaged all the time. The shop told us the noise was coming from the #8 side. I won't know what i am going to do with this car as far as go re-manufactured or re-build it, i guess best thing to do is pull it and tear it down, The only bad thing is since this is the wifes car, i am not familiar with 4.6's, i have a 7.3 diesel and some other brands, so not sure what these ford 4.6's can do if modified ?????
CAKID49 is offline   Reply With Quote
Old 03-01-2007, 10:38 AM   #14
Moderator Emeritus
Legacy
Regular
 
SpectorV's Avatar
 
Join Date: May 2003
Region: Alabama
Posts: 26,049
Send a message via AIM to SpectorV
Re: 4.6 motor problems HELP!!!! please

it depends on what you modify. If you build the engine with a stronger block etc etc you can make massive hp/tq. You could drop in an 03/04 cobra engine/transmission those in stock form with just a blower/fuel/pulley change and a tune can push out 700hp and hold together. Very strong stock engines.
__________________
2003 Cobra Vert (Redfire) #3938 of 5082 @ 05/27/2003
472rwhp/493rwtq -Modification List - Dyno Sheet
2012 Mustang 3.7L M6 (Kona Blue)
2011 Ford Edge Sport (Red Metallic)
SpectorV is offline   Reply With Quote
Old 03-01-2007, 10:42 AM   #15
15.3 Second V8 Killer Yo
Legacy
Regular
 
PureVenom's Avatar
 
Join Date: Aug 2004
Region: Louisiana
Posts: 7,212
Send a message via AIM to PureVenom Send a message via MSN to PureVenom Send a message via Yahoo to PureVenom
Re: 4.6 motor problems HELP!!!! please

Check out Welcome To VT Engines and look at their 2 valve offerings. You can make a ton of power with a 2 valve if you build it right...it all depends on what your plans are. Run it NA or run a power adder...you just have to decide up front to make sure you build it right the first time.
__________________
"When I know more, I'll be forthcoming. Or I won't be forthcoming, and I'll be honestly deceptive." - Les Miles
PureVenom is offline   Reply With Quote
Old 03-01-2007, 04:24 PM   #16
Registered Member
Regular
 
bullitt482's Avatar
 
Join Date: Apr 2006
Region: Mississippi
Posts: 1,106
Re: 4.6 motor problems HELP!!!! please

Quote:
Originally Posted by 1234 View Post
That would be 96-98 in 99 they changed who made the block
Actually 99's and some 2001's had them... The same way ford leaked over some forged pistons into the 92 model year when they supposedly switched to hypereucraptic pistons... I mean hypereutectic.


From Ford Mustang SVT Cobra - Wikipedia, the free encyclopedia


While 2001 Cobra shares almost all the same components of the 1999, some changes were made. The changes included:


The engine block was changed from the Teksid block to the Windsor Aluminum Plant or WAP block. The WAP block is regarded to be weaker than the previous Teksid block. Some 2001s received the Teksid, either from the factory or as a replacement motor.
__________________
01 Bullitt
bullitt482 is offline   Reply With Quote
Old 03-01-2007, 04:28 PM   #17
Moderator Emeritus
Legacy
Regular
 
SpectorV's Avatar
 
Join Date: May 2003
Region: Alabama
Posts: 26,049
Send a message via AIM to SpectorV
Re: 4.6 motor problems HELP!!!! please

what about the 00 cobras?
__________________
2003 Cobra Vert (Redfire) #3938 of 5082 @ 05/27/2003
472rwhp/493rwtq -Modification List - Dyno Sheet
2012 Mustang 3.7L M6 (Kona Blue)
2011 Ford Edge Sport (Red Metallic)
SpectorV is offline   Reply With Quote
Old 03-01-2007, 04:32 PM   #18
Registered Member
Regular
 
bullitt482's Avatar
 
Join Date: Apr 2006
Region: Mississippi
Posts: 1,106
Re: 4.6 motor problems HELP!!!! please

There are no 00 Cobras, just the saught after 2000 Cobra R(think AARRRrrrrr ). And they have the DOHC Lincoln Navi motor with more aggressive heads/cams. 385 hp and tq of pure road course lovin'.... MMmmmmm..... Ford didn't really have time to make a 2000 Cobra, because of all the recalling they had to do to fix the issues with the 99's. They had problems not delivering the power that Ford promised.
__________________
01 Bullitt
bullitt482 is offline   Reply With Quote
Old 04-02-2007, 01:40 AM   #19
Registered Member
Regular
 
alwaysthefinest's Avatar
 
Join Date: Apr 2007
Region: Montana
Posts: 88
Send a message via Yahoo to alwaysthefinest
Exclamation Re: 4.6 motor problems HELP!!!! please

Quote:
Originally Posted by Kiljosh View Post
Dont quote me, but I think a cobra motor has the same block just differnt heads and timing chain setup. They are DOHC instead of SOHC.

You could probrobly find a cobra topend but after that and the bottom end rebuild it will cost alot.

I wouldn't really try to replace a rod bearing if you aren't going to do it yourself. And its very hard, you have to have special tools and measure incredibly small clearances.

Look for a whole cobra motor, or else just a refurbished GT motor.
I guess I'm confused.... I was told at the shop that my motor is DOHC not a single.... Above you stated that the 4.6 GT was single???? Is that an error??? I also would like to replace my engine with a cobra's.... just curious about the SOHC and DOHC thing though...
__________________
PrOjEcT MaYhEm
alwaysthefinest is offline   Reply With Quote
Old 04-02-2007, 03:39 AM   #20
Registered Member
Regular
 
Join Date: Jul 2006
Region: South Carolina
Posts: 996
Re: 4.6 motor problems HELP!!!! please

Quote:
Originally Posted by alwaysthefinest View Post
I guess I'm confused.... I was told at the shop that my motor is DOHC not a single.... Above you stated that the 4.6 GT was single???? Is that an error??? I also would like to replace my engine with a cobra's.... just curious about the SOHC and DOHC thing though...
94-95 Mustang GT's and Cobras use a 5.0L OHV motor.

96-98 Mustang GT's use a 4.6L SOHC motor.

96-98 Mustang Cobras use a 4.6L DOHC motor.
JROC is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Idle Problems on warm motor in Park? 91StangGT5.0 1979-1995 Mustang GT 2 03-06-2010 12:50 AM
hot to tell the dif between PI motor and reg motor Keto77 1996-2004 Mustang GT 13 07-29-2009 01:03 AM
new motor rswan112 Pre-2005 V6 Mustang 3 03-06-2007 10:50 AM
New Best On the Motor v6stanger Pre-2005 V6 Mustang 4 02-25-2006 09:04 PM
New Motor GT-Eater Pre-2005 V6 Mustang 30 07-18-2005 01:01 AM

» Like Us On Facebook



09:52 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.