4.6 sohc question

[coupegt]

i picked up a 1998 mustang gt 4.6 5 speed today after i got down the road noticed it had a noise kinda sounds like lower end rod knock after it warmed up. would i benifit by getting a 1999 up crown vic pi motor and dropping in it or what 4.6 pi can i put in without changing alot. Im not familar with 4.6 motor have always had foxbodys so any info would be appreciated thanks

[Dirtyd0g]

Knowing these you have a broken ring land causing piston slap, I have a good motor for it if you need one.
Alan

[coupegt]

What motor do you have it a pi motor. How much would you want for it

[Dirtyd0g]

no it is a complete 97 NPI motor with 95k on it it does have the aluminum crossover.
I want $350 for it if you need it installed I can do that as well. I will guarantee it if I install it.
Alan

[coupegt]

ok going to check it out and try to find a pi motor do you know if crown vics or f150 99-up would be more horse power than my npi and if they are diffect fit

[Dirtyd0g]

Avoid truck engines, I have some PI heads I can have rebuilt and put on this motor with pi cams and intake but the cost would probably be $1200-$1500 that way the gaskets and stuff are expensive. That does give a slight compression increase from the NPI block with PI heads. For hat matter I have a few markVIII shortblocks too but then you are high octane only.
Alan

[HawksWR37]

you'd be better off to get a complete running motor for 350 then get the parts to swap pi heads on it and different cams.

[Stangman]

Good to see ya got a stang again Billy

[CincySR]

Using PI heads and intake on a 97 block will yield somewhere in the neighborhood of 60-70hp due to the higher compression it will create with that combo. If you keep your eyes open, you can pick up a set of PI heads/intake for a couple of hundred bucks and swap them yourself later on down the road.

[coupegt]

Do crown Vic's have pi heads I see them all the time at junk yards

[coupegt]

Yeah Jesse I have been wanting one with a 4.6 just sucks I don't know much about building a 4.6 but guess I will learn lol I have rode in a few 4.6 cars and they always seemed to run good so wanted to give one a shot

[Dirtyd0g]

Crown vic didn't get PI heads until 2002
Alan

[coupegt]

would pi cams work in a npi head would i notice a difference until i do i pi head swap have seen pi cams on e bay i have been trying to look up some basic info on 4.6 motor since have never had one before.

[JIMS SVT]

I wouldnt go throught the trouble of swappin those cams in.Alot of work for very little gain. Prolly gain more from a cold air intake lol.

[coupegt]

Oh ok I already have a cold air intake will just wait and do the complete pi swap plan on pulling my motor out next week

[coupegt]

after taking car to store today noise in my motor got louder but not constant repeating niose i have tried looking up problems with timing chain in 4.6 motors the symptoms sound like mine so has anyone had timing guides fail in a 4.6 planned on pulling motor out this week but think i will take front timing cover off first to check guides and tensioners

[akagreg3]

lol ooh man,,

you really dont know what you have gotton your self in too, do not losen the timming chians with out the otc tool to lock the cams or be prepared to either pay someone to degree the cam or do it your self, 4.6 are nothing like a 302 they come from the factory 4 degrees off on the drivers side cam i believe?

like jim said to much to type out,, get a crown vic motor or even a better 4 valve engine swap it out, everything will fit right up, get the ecm/computer to the crown vic tho thats where the power comes from

just my 2cents gl man.

[coupegt]

started pulling it apart last night decided to just pull motor out and check it out or replace it will see what i find internally wrong with it and go from there

[Dirtyd0g]

if you need help with timing just let me know I have done it many times. I don't trust the wedge tool I mark the chains and line up the marks.
Alan

[bobtsgt]

Like Alan said mark everything so it all goes back together again nicely when your ready. Hopefully its just weak chain adjusters

[chris91]

I bet its the tensioners. Had em go bad on my old engine and it sounded like a knock almost. It wiped out the guides too.

[Dirtyd0g]

If you turn these motors over backwards at any time the tensioners will click out one and eat the guides. Be careful when rotating the engine .
Alan

[coupegt]

Got motor pulled out today timing guides look good one side adjuster was alittle loose but not to bad it will get all new timing parts anyway. And it is a Romeo motor

[Dirtyd0g]

The trick flow kit is the best deal if you need one let me know they ship to me fast. You can get the adjustable lower if needed too but if you are using stock cams you won't need it.
Alan

[coupegt]

Got motor out and apart to find the problem a spun rod bearing that wasted crank and must have pushed a spark plug out in the past 3rd plug on pass side had a long 14mm plug with what apeats to be a retapper on the end so time to save up for parts or new motor

[chris91]

Personally I'd just get ya an entire PI engine. Will save ya money in the long run.

[coupegt]

Yeah have to save up and hope to find a good one when I get the money together plan on putting some good rc cars on eBay this week that I no longer use

[the"game"]

you can just put the p.i cams and intake on a non p.i motor and gain right around 30 to 50hp just buy doin that. or just use the p.i intake and get u some comp cam stage 2 cams it will run real good. and just a reminder if u use the non p.i motor and u use the p.i intake make sure u use the non p.i intake gaskets... because if u use the p.i intake gaskets on a non p.i motor it will leak..

[coupegt]

ok im new to 4.6 motor so any info is helpful and will be written down so i dont forget any tips

[Dirtyd0g]

Thats not how I do it, I use the PI gaskets and a little silicone, done it many times.
Alan

[the"game"]

if u use the p.i intake gaskets u will have to use alot of silicone around the water ports.. i have seen alot of times it fails... so u use the non p.i gaskets. but its up to u

[coupegt]

Does anyone know if a 2002 up crown Vic motor will be a direct bolt in on a 98 gt or what will I have to change

[coupegt]

I got a set of pi heads but discovered they are windsor heads after i got home casting xl3e-6090-cz0d and I have a Romeo motor can I use these heads on it or should I get Romeo heads I also thought Romeo heads had 11 valve cover bolts and windsor had 13 and 14. But these Windsor heads have 11 and cam gears are pressed on not bolted like Romeo.

[coupegt]

heads do have more than 11 bolts forgot to count bolts that are in timing cover just counted ones on head since i dont have the valve cover for the heads yet

[akagreg3]

been a long time since i messed with a 4.6 but i thought i read you can use windsor heads on a romeo motor you just have to use windor valve cover, but dubble check on that.

gl either way

[akagreg3]

http://www.stangnet.com/mustang-forums/threads/pi-headswap-write-up.717166/

[coupegt]

A lot of good info in that sight posting but think I will just get Romeo heads just to be safe

[Dirtyd0g]

Don't fear windsor heads if you have valve covers for them, you do need bolts for them as well they use larger bolts to attach the front cover.
Alan

[JIMS SVT]

I have a nice set of valve covers that have 11 bolt holes in them if your interested

[coupegt]

I have the valve covers but seen some postings on Internet and they say not to mix Romeo and Windsor parts it will cause problems gas anyone on here put windsor heads on a Romeo block I just don't want any problems that can be prevented.

[akagreg3]

alan porbably has done everything there can be done to a 4.6 lol if he say it will work then it will.

[na svt]

I have the valve covers but seen some postings on Internet and they say not to mix Romeo and Windsor parts it will cause problems gas anyone on here put windsor heads on a Romeo block I just don't want any problems that can be prevented.

You can use any mod motor head (2v or 4v) on any mod motor block (4.6 and 5.4).

[Dirtyd0g]

I am not very familiar with 3v and coyote motor changes but I know for certain you can use any NPI or PI head on any block, teksid blocks need the water jacket drilled out for 2v head use.
Alan

[Dirtyd0g]

if u use the p.i intake gaskets u will have to use alot of silicone around the water ports.. i have seen alot of times it fails... so u use the non p.i gaskets. but its up to u

NPI gaskets restrict the port horribly, I have compared the gaskets, I don't know what you determine as a lot of silicone I use a small spot of it. Everyone else I know does it the same way as me. You have to let the silicone semi harden before tightening and don't smear it. There was a write up about it with pictures on a forum a while back I just don't remember where. Having done this many times I completely disagree with you on this.
Alan

[coupegt]

Are windsor and Romeo intakes the same on a 4.6

[Dirtyd0g]

Yes the intakes are only changed by year, NPI or PI.
Alan

[coupegt]

Ok thanks Alan