head bolt question - Ranger-Forums - The Ultimate Ford Ranger Resource

4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

head bolt question

Reply

 
 
 
  #1  
Old 11-20-2011
Member
Thread Starter
Join Date: Feb 2011
Location: LaMonte, MO
Posts: 11
head bolt question

hey, i'm in he process of putting headgaskets on my 93 ranger. just started putting it back together and was curiious which if any of the head bolts need sealer. i have them all in with oil on the threads and under the heads and torqued to the first stage. i figured i could pull them one at a time and put sealer on them if it is required if someone knew exactly which ones need it. none of the articles i find on head gasket replacements on these engines specifically talk about sealant so i am wondering if any need it.

also having a hard time finding the official torque spec for the rocker shaft. i have found a spec of 50 ft/lb and wonder if that is correct
 
Reply With Quote
  #2  
Old 11-20-2011
Blhde's Avatar
Member
Join Date: Oct 2005
Location: Northern IL
Posts: 2,804
These are new bolts right? I see no sealant listed in this step, these are pulled from a ford shop manual for 99.

5. CAUTION:
Do not reuse the cylinder head bolts. They are torque-to-yield. Reuse of the cylinder head bolts may cause damage to the engine.

Install the bolts.

l Tighten the bolts in sequence in three steps:

1 Tighten to 65 Nm (48 lb-ft).

2 Tighten to 80-85 Nm (59-62 lb-ft).

3 Tighten an additional 80-85 degrees.


2. Install the rocker arm shaft assembly and tighten in two steps:

1 Tighten to 30-34 Nm (22-25 lb-ft).

2 Tighten an additional 90 degrees.
 
Reply With Quote
  #3  
Old 11-20-2011
Member
Thread Starter
Join Date: Feb 2011
Location: LaMonte, MO
Posts: 11
head bolts are new rocker bolts are not. i had heard the older ones were not torque to yield on the rocker shafts. dont know if thats true. its a 93 there could have been a change between 93 and 99. i dont have a problem replacing the bolts ithough if thats whats called for
 
Reply With Quote
  #4  
Old 11-20-2011
Member
Thread Starter
Join Date: Feb 2011
Location: LaMonte, MO
Posts: 11
well im finding some more places that are saying 24 ft/lb + 90 deg. so its looking like they are tty
 
Reply With Quote
  #5  
Old 11-20-2011
Blhde's Avatar
Member
Join Date: Oct 2005
Location: Northern IL
Posts: 2,804
The manual doesn't say new bolts for the rockers, i was just referring to the heads bolts.

The rockers will not see the same stress as the head bolts will so I doubt the need to replace them. If they are a reasonable price and the wait doesn't effect you much then buy new.
 
Reply With Quote
Reply
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
blueranger789
General Ford Ranger Discussion
3
10-25-2010 09:03 PM
4.0L OHV & SOHC V6 Tech
28
08-27-2008 10:43 PM
Du510
General Technical & Electrical
0
12-31-2007 01:01 AM
rangerrob
2.9L & 3.0L V6 Tech
1
02-20-2006 01:23 PM
rangeon99
4.0L OHV & SOHC V6 Tech
20
12-04-2005 01:36 PM


Thread Tools
Search this Thread