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

Fox Rockers coming loose

  • Thread starter Thread starter J576
  • Start date Start date Jun 7, 2019
J

J576

Member
Oct 25, 2018
13
5
13
Nanaimo, BC
Jun 7, 2019
#1
  • Jun 7, 2019
  • #1
So I've just dropped a 91 f150 302 in my fox, and I keep having issues with the vavle train come loose. I pulled the push rods out and inspected when the motor was out and they went back in exactly how they came out. I've now adjusted them twice and have come loose both times after running for 5 mins. Stock motor nothing been changed.

What the hell am I doing wrong I'm getting annoyed please help
 

RangerJoe

I leave the horn on while driving
15 Year Member
Apr 26, 2010
2,560
1,146
184
Georgia
Jun 7, 2019
#2
  • Jun 7, 2019
  • #2
If putting back exactly as they were with no other changes, such as different push rods, lifters, cam, head gaskets, etc., then you should tighten each rocker arm while the cam is on the base circle, meaning valve fully closed. This will mean that the engine needs to be rotated several times to get each valve closed. They should be tightened to 20 ft lbs.

Joe
 
Reactions: 90sickfox

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,899
10,554
203
polk county florida
Jun 7, 2019
#3
  • Jun 7, 2019
  • #3
I may be wrong (imagine that) but I feel there is something missing. If you look at one of these videos you will see that there is a u shaped piece that goes between the rocker assembly and the head. I am not seeing this in your pic.
 
J

J576

Member
Oct 25, 2018
13
5
13
Nanaimo, BC
Jun 7, 2019
#4
  • Jun 7, 2019
  • #4
General karthief said:
I may be wrong (imagine that) but I feel there is something missing. If you look at one of these videos you will see that there is a u shaped piece that goes between the rocker assembly and the head. I am not seeing this in your pic.
Click to expand...

I don't think there's anything missing, its exactly how I got it out of a running truck, and it matches the motor I pulled
 

a91what

SendMeUrDataLog
10 Year Member
Apr 6, 2011
10,739
6,720
214
Hillsborough county
Jun 7, 2019
#5
  • Jun 7, 2019
  • #5
@General karthief is talking about the u shaped tray that the two rocker assembly's bolt through, this tray keeps the rockers aligned with the valve.
You may not be showing it in the pic but I can see the tray under the set of rockers adjacent to the ones you have pulled. This tray must be used.
 
J

J576

Member
Oct 25, 2018
13
5
13
Nanaimo, BC
Jun 7, 2019
#6
  • Jun 7, 2019
  • #6
General karthief said:
I may be wrong (imagine that) but I feel there is something missing. If you look at one of these videos you will see that there is a u shaped piece that goes between the rocker assembly and the head. I am not seeing this in your pic.
Click to expand...

I know what you meant by the "u" thing haha its there just not in the photos it connects the bottom of the rockers ! And it was installed
 
Reactions: General karthief

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,899
10,554
203
polk county florida
Jun 7, 2019
#7
  • Jun 7, 2019
  • #7
Damn! That's twice this week
 

CarMichael Angelo

my rearend will smell so minty fresh,
15 Year Member
Nov 29, 1999
10,641
8,909
234
Birmingham, al
Jun 7, 2019
#8
  • Jun 7, 2019
  • #8
I'm just gonna go out on a limb and say cam failure. If the same two rockers are torqued down and the bolt backs off, that's one thing. But if they aren't loosening, and the pushrod is all kinds of loose after running....I'll take dead cam for 1000 alex.
 

RangerJoe

I leave the horn on while driving
15 Year Member
Apr 26, 2010
2,560
1,146
184
Georgia
Jun 7, 2019
#9
  • Jun 7, 2019
  • #9
Mike makes a good point. Are the bolts physically backing out, or are the rockers loose?

Joe
 

darkfader

5 Year Member
Feb 16, 2017
249
342
83
Davis, WV
Jun 7, 2019
#10
  • Jun 7, 2019
  • #10
Not sure about your rockers but the oil puddled in the rocker in the first pic looks a little off.
 
J

J576

Member
Oct 25, 2018
13
5
13
Nanaimo, BC
Jun 7, 2019
#11
  • Jun 7, 2019
  • #11
RangerJoe said:
Mike makes a good point. Are the bolts physically backing out, or are the rockers loose?

Joe
Click to expand...

The bolts are physically backing out
 

96pushrod

I think they're a little easier to get off
5 Year Member
May 15, 2018
1,530
871
133
Savannah
Jun 7, 2019
#12
  • Jun 7, 2019
  • #12
darkfader said:
Not sure about your rockers but the oil puddled in the rocker in the first pic looks a little off.
Click to expand...
Looks like Yoohoo!

Never seen the pedestal bolts back out before. Had them break...
 
Reactions: darkfader

Wayne Waldrep

Before I post a pic, do you have one of yours?
20+ Year Stangneter
Apr 14, 2003
1,338
659
143
Cuba, AL
Jun 7, 2019
#13
  • Jun 7, 2019
  • #13
Sorry I don't have an answer but those are great pictures. If everyone with a question posted that quality of pic it would be nice!
 

RangerJoe

I leave the horn on while driving
15 Year Member
Apr 26, 2010
2,560
1,146
184
Georgia
Jun 7, 2019
#14
  • Jun 7, 2019
  • #14
J576 said:
The bolts are physically backing out
Click to expand...

I don't believe a bad cam would cause them to back out. Did you use the procedure I listed to tighten them?

If you do it with the valve open, the valve springs and the spring in the lifter will absorb some of the torque load and give you a false reading.



Joe
 
Reactions: General karthief
J

J576

Member
Oct 25, 2018
13
5
13
Nanaimo, BC
Jun 8, 2019
#15
  • Jun 8, 2019
  • #15
RangerJoe said:
I don't believe a bad cam would cause them to back out. Did you use the procedure I listed to tighten them?

If you do it with the valve open, the valve springs and the spring in the lifter will absorb some of the torque load and give you a false reading.



Joe
Click to expand...
I did it how you told me too last night, started tdc of cylinder 1 on compression stroke and tightened to 20ft pounds, and then just followed my firing order around, double checked through the order once more and then ran the car for 10 mins. Seems to run really good (besides doing the timing) cable train stayed quiet the whole time
 
Reactions: General karthief and RangerJoe
J

J576

Member
Oct 25, 2018
13
5
13
Nanaimo, BC
Jun 8, 2019
#16
  • Jun 8, 2019
  • #16
Might be premature cause I'd like to run the car a little longer but I just want to thank everyone for the help, I really appreciate it ! Now on to the next issue. Coolant looks like its coming from the timing chain cover
 

Wayne Waldrep

Before I post a pic, do you have one of yours?
20+ Year Stangneter
Apr 14, 2003
1,338
659
143
Cuba, AL
Jun 8, 2019
#17
  • Jun 8, 2019
  • #17
J576 said:
Might be premature cause I'd like to run the car a little longer but I just want to thank everyone for the help, I really appreciate it ! Now on to the next issue. Coolant looks like its coming from the timing chain cover
Click to expand...
Oh no. That's best taken care of before the engine goes in. Much easier to drop the pan, install the timing cover with new gaskets, then the one piece oil pan gasket and pan. I did mine in the car last year. It sucked. If you get to that point there's help to be had.
 
J

J576

Member
Oct 25, 2018
13
5
13
Nanaimo, BC
Jun 8, 2019
#18
  • Jun 8, 2019
  • #18
Wayne Waldrep said:
Oh no. That's best taken care of before the engine goes in. Much easier to drop the pan, install the timing cover with new gaskets, then the one piece oil pan gasket and pan. I did mine in the car last year. It sucked. If you get to that point there's help to be had.
Click to expand...
Haha I didn't know the seal was bad before I put it in the car ! Pretty bummed out on it
 
You must log in or register to reply here.

Similar threads

C
Valve stem tip tap?
  • Coolen
  • Apr 6, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
20
Views
858
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Apr 14, 2025
Noobz347
J
Help Figuring Motor Choice(Possible future turbo)?
  • jaygee15
  • Dec 14, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
13
Views
612
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 3, 2026
Jarhead67
J
G
Engine Pushrod Length Question
  • germain101
  • Sep 22, 2025
  • Fox 5.0 Mustang Tech
Replies
12
Views
549
Fox 5.0 Mustang Tech Sep 25, 2025
Noobz347
J
2004 Mustang 3.8L V6 vibrations above 65 MPH and differential leaks
  • joeybuddy96
  • Mar 16, 2026
  • SN95 V6 Mustang Tech
Replies
16
Views
525
SN95 V6 Mustang Tech Yesterday at 2:38 PM
joeybuddy96
J
S
Help with window and possible engine
  • StefRena22
  • Jun 12, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
19
Views
878
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 21, 2025
Willybill32
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
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?