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Discussion Starter #1
Hey everyone, I've been doing some research on here on a problem with my car. It's a '99 GT 5spd and for the past several months it's been knocking/rattling pretty bad under load usually above 2000-2500 rpm. Now that it is finally a little bit dry outside I'm planning on crawling around it to try and pinpoint where it is coming from. If worse comes to worse and it ends up being a main bearing or something else catastrophic, would a 32v 4.6L out of a '98 Lincoln work as a swap? Also, would I need to to anything to the ECU or any other electrical management system? Thanks in advance.
 

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it can be made to work but is hardly worth the hassle (280hp vs the 260 you have), not to mention they use a return style fuel system which your car doesn't have, something that is a real pita to deal with, I'd just find a new shortblock or entire used PI motor...cheap and plentiful on Ebay
 

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The knocking/rattling sound, does it occur only under load or can you duplicate it just by revving?

I ask because the first thing that comes to mind is detonation. But that typically occurs only under load, so... If it's something mechanical; rod knock, valvetrain, etc. usually stuff like that is more consistant and you can hear it at any engine speed.
 

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Might be handy to mention WHICH 32 valve Lincoln we are talking about.

Mark8 rear wheel drive=yes
Continental front wheel drive=no
 

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Discussion Starter #5
The only info I have is it is from a '98 Lincoln unfortunately. As for the knocking I thought it might be ping at first but I'm on my 3rd full tank of premium and it hasn't changed. I can now get the knocking to happen now around 2000+ rpm but only after it is at operating temp. I'm starting to lean towards a main bearing.
 

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my main thing is mustang swaps. and a 98 mark is a very good swap for you . the return fuel system is easy to deal with. but you will need cobra parts to do it . your oil pan with 96-98 cobra oil pick up tube , and cobra exaust manifolds or headers. and your motor injection harness and lower. the injection harness needs to be rearranged to fit the mark induction. and the imrc valves need to be wired open or better deleted 300.00 . fyi i charge 300 to set up a mark motor for a mustang with your parts. wires, pan etc. if you look at my pitures you will see a 98 mark motor set up for a 98 mustang . your motor sounds like a rod bearring hammered out but has not turned yet. make shure you get the mark motor complete, you will need the thermostat housing and hoses. i am setting up a 98 mark motor for a mustang today. i can help with info, and if you want i will modify your injector harness for you. if you want more info email. and 98 mark is 295 hp compared to 305 cobra. and if you add the mustang exaust and air inlet you are about there . for tunning after the swap wait and see if your ecu can adjust the fuel . the 96-98 do adjust. many tunner guys say i will need tuned. but if no check engine light you are good to go. these ecu are very smart and will make adjustments for just about what aver you do . but a tune will boost performance, but at a cost . maks shure you get the mark mass air . and you will need a air tube for a 99-01 cobra or a 03-04 mach 1 see my pitures.fyi the 97-98 mark motor induction will fit a mustang 93-96 will not
 

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Discussion Starter #7
Thanks for the good info! Looks like as of right now this will be more work than I am willing to take on especially with very limited work space. Looks like I will keep looking for a standard 4.6 and go from there. Thanks again everyone for the help. This place never fails for great info!
 
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