• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Engine Engine rebuild suggestions

  • Thread starter Thread starter JulianR
  • Start date Start date Mar 3, 2023
  • Tags Tags
    302 rebuild 5.0 rebuild
Prev
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • …
  • 22
Next
First Prev 4 of 22 Next Last

Hot Stang

Member
Aug 19, 2022
40
16
18
Hiawassee Ga
Jul 29, 2023
#61
  • Jul 29, 2023
  • #61

You don't need a big carb either if you're going down that road. I'm only running a little 600 CFM. I get good milage as long as I keep my foot out of it
 
Reactions: JulianR

JulianR

Active Member
Jun 13, 2016
179
43
38
Aug 3, 2023
#62
  • Aug 3, 2023
  • #62
The disassembly is progressing well. My mustang has the AC system. is there a way to pull the engine without removing the freon, or do I need to disconnect the AC lines?
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,818
3,951
183
Claremore, OK
Aug 4, 2023
#63
  • Aug 4, 2023
  • #63
Remove the factory airbox and put the compressor in that area. At least that is what I remember I did the last time the system on my Coupe was charged. May have hung it off the shock tower where it hung down where the MAF goes but it can be done.
 
Reactions: JulianR

JulianR

Active Member
Jun 13, 2016
179
43
38
Aug 4, 2023
#64
  • Aug 4, 2023
  • #64
While I'm working on pulling the engine, I'm still thinking about exactly what I want to do to it. In the mean time- can you please teach me about heads. I know CFM is the unit of measure, but what numbers do I look at when thinking about heads. Just CFM?

At this point, I haven't gotten to mine yet, so not sure what I even have, but assuming I have stock heads, what values do I compare to aftermarket heads to determine if they're bigger/better than mine or the same?
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,818
3,951
183
Claremore, OK
Aug 4, 2023
#65
  • Aug 4, 2023
  • #65
you most likely have E7 heads which flow as follows (old data I have from the now defunct powerheads.com:

Lift / Flow Rate in CFM
0.100” / 53.0
0.200” / 95.5
0.300” / 133.4
0.350” / 141.5
0.400” / 143.8
0.450” / 154.0
0.500” / 159.4

I will say that right now the most economical aluminum heads are the AFR Enforcers. TFS makes great stuff as well.

You get stupid and install a set of AFR 205’s or 225’s but they flow so much air that with that small of a NA motor it will fall on its face. It will run but not optimally.

So whatever heads you go with then build the rest of the induction system around them (cold air kit, MAF, TB, upper intake, and lower intake) i.e. make sure they will all flow what the heads will.

If you stay with the stock cam you may want to scrounge up a set of 1.7 ratio rockers to get a little more lift out of the stock cam profile.

Fuel system will need upgrades like a minimum of a 155 lph pump, adjustable FPR, and bigger injectors (match the MAF to them) but I think that has been covered.
 

JulianR

Active Member
Jun 13, 2016
179
43
38
Aug 8, 2023
#66
  • Aug 8, 2023
  • #66
2 more questions, but I'll post them in 2 separate posts.

For this post, I came across a set of gt40p heads that were being sold close to me with upgraded springs. The price was $250. When I met up to take a look, I noticed one of the bolt down holes was chipped. The seller assured me it's not an issue. I figured I take a chance because $250 is way cheaper than $1200 for the aluminum heads and I don't seem to find may of these for sale around me at any decent price.

Do you think this will be a problem?

 

JulianR

Active Member
Jun 13, 2016
179
43
38
Aug 8, 2023
#67
  • Aug 8, 2023
  • #67
Question number 2. I'm about an hour away from pulling the engine out. Where do I attach the chains or load leveler on the engine? If there ever were the stock engine lift hooks on the engine, they're no longer there I still have the accessory mount mounted on-- minus the AC and Power Steering.

One last thing, when spinning the pulley on the power steering pump by hand, it doesn't easily free spin-- I'm feeling some resistance. Is that normal? Power steering driving wise was never a problem.
 

limp

wrap a little cheese around it and its a done
5 Year Member
Oct 4, 2020
5,463
2,894
173
Florida
Aug 8, 2023
#68
  • Aug 8, 2023
  • #68
JulianR said:
Question number 2. I'm about an hour away from pulling the engine out. Where do I attach the chains or load leveler on the engine? If there ever were the stock engine lift hooks on the engine, they're no longer there I still have the accessory mount mounted on-- minus the AC and Power Steering.

One last thing, when spinning the pulley on the power steering pump by hand, it doesn't easily free spin-- I'm feeling some resistance. Is that normal? Power steering driving wise was never a problem.
Click to expand...
I went from one head to the other, using the 7/16 or the 3/8 bolt hole in them...Front to rear..
Jack the rear of the car up as high as you can. You will not have to tilt the engine as much...
 
Reactions: slow84lx and JulianR

keel

Active Member
Aug 23, 2020
207
72
38
Seattle, Wa
Aug 8, 2023
#69
  • Aug 8, 2023
  • #69
JulianR said:
2 more questions, but I'll post them in 2 separate posts.

For this post, I came across a set of gt40p heads that were being sold close to me with upgraded springs. The price was $250. When I met up to take a look, I noticed one of the bolt down holes was chipped. The seller assured me it's not an issue. I figured I take a chance because $250 is way cheaper than $1200 for the aluminum heads and I don't seem to find may of these for sale around me at any decent price.

Do you think this will be a problem?
Click to expand...
If that chip gets into the threads of that bolt hole I would chase the threads and clean them up before trying to insert a fastener, but otherwise it looks like there is plenty of gasket surface left in that area and plenty of threads left in that bolt hole. I don't think it will cause any problems.
 
Reactions: slow84lx and JulianR

JulianR

Active Member
Jun 13, 2016
179
43
38
Aug 8, 2023
#70
  • Aug 8, 2023
  • #70
keel said:
If that chip gets into the threads of that bolt hole I would chase the threads and clean them up before trying to insert a fastener, but otherwise it looks like there is plenty of gasket surface left in that area and plenty of threads left in that bolt hole. I don't think it will cause any problems.
Click to expand...
yea, agree there's plenty of threads. My only concern is will the bolt head have something to sit against to tighten down.
 

keel

Active Member
Aug 23, 2020
207
72
38
Seattle, Wa
Aug 8, 2023
#71
  • Aug 8, 2023
  • #71
JulianR said:
yea, agree there's plenty of threads. My only concern is will the bolt head have something to sit against to tighten down.
Click to expand...
It appears to me that the hole in question is for the intake manifold, in which case the head of the bolt will be up against the lower intake, not the cylinder head.
 

JulianR

Active Member
Jun 13, 2016
179
43
38
Aug 8, 2023
#72
  • Aug 8, 2023
  • #72
So you saying all will be good?
 

keel

Active Member
Aug 23, 2020
207
72
38
Seattle, Wa
Aug 8, 2023
#73
  • Aug 8, 2023
  • #73
JulianR said:
So you saying all will be good?
Click to expand...
As long as that chip doesn't prevent the bolt from threading in properly, I don't think you will have any issues at all. I would be careful to make sure it doesn't cross thread, but that would be my only concern.
 
Reactions: JulianR

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,818
3,951
183
Claremore, OK
Aug 8, 2023
#74
  • Aug 8, 2023
  • #74
I would run studs and not bolts. Studs are not as hard on the threads as they only exert a pulling force where bolts exert a pulling force coupled with a twisting force.
 
Reactions: JulianR and General karthief

General karthief

wonder how much it would cost to ship you a pair
5 Year Member
Aug 25, 2016
27,868
10,541
203
polk county florida
Aug 8, 2023
#75
  • Aug 8, 2023
  • #75
Wow, without seeing it in person only thing I would suggest is try to thread an intake bolt in there first to see it threads in and how much thread engagement you have.
I like the stud advice, possibly use a nut under it
Yeah I'm a hack
 
Reactions: JulianR

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,818
3,951
183
Claremore, OK
Aug 8, 2023
#76
  • Aug 8, 2023
  • #76
@General - man I would be cautious with a nut under it because if it backs off wouldn’t it fall into the lifter valley?

I’m not a fan of the aluminum threads on the heads to torque an intake down. Pulled a couple on the AFR’s using bolts and had to heli coil them so that is when I switched to using studs and zero problems since.
 

General karthief

wonder how much it would cost to ship you a pair
5 Year Member
Aug 25, 2016
27,868
10,541
203
polk county florida
Aug 8, 2023
#77
  • Aug 8, 2023
  • #77
AeroCoupe said:
@General - man I would be cautious with a nut under it because if it backs off wouldn’t it fall into the lifter valley?

I’m not a fan of the aluminum threads on the heads to torque an intake down. Pulled a couple on the AFR’s using bolts and had to heli coil them so that is when I switched to using studs and zero problems since.
Click to expand...
I told you I'm a hack I wouldn't be scared to do it.
 
Reactions: AeroCoupe

JulianR

Active Member
Jun 13, 2016
179
43
38
Aug 9, 2023
#78
  • Aug 9, 2023
  • #78
AeroCoupe said:
I would run studs and not bolts. Studs are not as hard on the threads as they only exert a pulling force where bolts exert a pulling force coupled with a twisting force.
Click to expand...
Wow, learning something new. Had to google it. I thought a bolt is a bolt is a bolt Found ARP 354-2103 online-- unless you know of something cheaper.
 

General karthief

wonder how much it would cost to ship you a pair
5 Year Member
Aug 25, 2016
27,868
10,541
203
polk county florida
Aug 9, 2023
#79
  • Aug 9, 2023
  • #79
JulianR said:
Wow, learning something new. Had to google it. I thought a bolt is a bolt is a bolt Found ARP 354-2103 online-- unless you know of something cheaper.
Click to expand...
Can't go wrong with ARP. Yeah there is cheaper stuff but be honest, not that much cheaper and no warranty.
 
Reactions: JulianR

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,818
3,951
183
Claremore, OK
Aug 9, 2023
#80
  • Aug 9, 2023
  • #80
I used Dorman studs from the local parts store. Took an intake bolt in with me and found some coarse thread by fine thread studs that worked. Grabbed the corresponding nuts and then some plain finish williams washers. Washers were suggested by my engine builder so I took his free advice and haven't looked back. Fastenal had the washers but if you have a Grainger or McMaster/Carr they have them as well as will a really good local fastener supply.
 
Reactions: JulianR
Prev
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • …
  • 22
Next
First Prev 4 of 22 Next Last
You must log in or register to reply here.

Similar threads

Engine Suggestions on an engine rebuild. Stock cam/GT40Ps or aftermarket on both for a fun weekend driver?
  • MadSquirrelTech
  • Apr 28, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
23
Views
626
Fox 5.0 Mustang Tech May 7, 2026
MadSquirrelTech
9
Engine Donor '00 Mountaineer meet '91 Fox
  • 91firecracker
  • May 11, 2026
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
41
Views
716
Fox 5.0 Mustang Tech May 28, 2026
91firecracker
9
P
Engine Mysterious coolant leak at back of engine
  • palerider94
  • Jan 18, 2026
  • Fox 5.0 Mustang Tech
Replies
1
Views
175
Fox 5.0 Mustang Tech Jan 19, 2026
AeroCoupe
J
'04 3.8L V6 mineral deposits and oil on #3 cylinder. Does it need a rebuild or something simpler?
  • joeybuddy96
  • Mar 18, 2026
  • SN95 V6 Mustang Tech
Replies
5
Views
218
SN95 V6 Mustang Tech Jun 9, 2026
joeybuddy96
J
D
Engine HO cam in non HO roller block ‘93 f150
  • DanC1993f150
  • Mar 21, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
229
Fox 5.0 Mustang Tech Mar 29, 2026
General karthief
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?