New Manifolds, OEM or Aftermarket?
05-24-2016, 07:50 AM
#11
05-24-2016, 07:56 AM
#12
On a scale of 1 - 10 with 10 being most difficult I would rate it a 7 with the potential to be higher. It is not impossible for a good back yard mechanic but it ranks up there as one of the ****tier jobs I ever had to do. I planned up having the truck off the road for a week, just in case. I took my time and walked away when I started to get frustrated or needed some time to consider a better way to do something. I didn't use the entire week but I spread it out over a number of days just for that side.
FWIW I could do it much faster now but would still not like to.
Do lots of research, plan out the needed tools, especially extractors and have a welder handy just in case.
OP
I guess I have helped derail two of your threads now.
IMHO I would use OEM if you are going with manifolds. There are far too many stories of people going with Dorman and having issues shortly down the road. If you are keeping the truck any length of time, OEM. Selling in the near future, Dorman.
FWIW I could do it much faster now but would still not like to.
Do lots of research, plan out the needed tools, especially extractors and have a welder handy just in case.
OP
I guess I have helped derail two of your threads now.
IMHO I would use OEM if you are going with manifolds. There are far too many stories of people going with Dorman and having issues shortly down the road. If you are keeping the truck any length of time, OEM. Selling in the near future, Dorman.
05-24-2016, 08:59 AM
#13
F150 Forum
I am partial but I would stick with OEM, I have never heard of the OEM manifolds failing prematurely. The part numbers for a 07 5.4L F-150 are RH: original part number supersedes to three part numbers 9L3Z9K494A (http://parts.lakelandford.com/p/Mani...L3Z9K494A.html), 9L3Z9A462C (http://parts.lakelandford.com/p/Heat...L3Z9A462C.html), W716090S437 (http://parts.lakelandford.com/p/Heat...16090S437.html) & LH: 7L1Z9431A (http://parts.lakelandford.com/p/EXHA...7L1Z9431A.html)
05-24-2016, 09:15 AM
#14
Mark
iTrader: (1)
I am partial but I would stick with OEM, I have never heard of the OEM manifolds failing prematurely. The part numbers for a 07 5.4L F-150 are RH: original part number supersedes to three part numbers 9L3Z9K494A (http://parts.lakelandford.com/p/Mani...L3Z9K494A.html), 9L3Z9A462C (http://parts.lakelandford.com/p/Heat...L3Z9A462C.html), W716090S437 (http://parts.lakelandford.com/p/Heat...16090S437.html) & LH: 7L1Z9431A (http://parts.lakelandford.com/p/EXHA...7L1Z9431A.html)
05-24-2016, 01:33 PM
#15
F150 Forum
I would consider 70k premature but when reading this thread I seen most people posting about their OE manifolds going over 100k without issue and I haven't sold an abundance of them.
05-24-2016, 01:35 PM
#16
I had to do my passenger side a couple years ago, the bottom bolt on the rear cylinder snapped off in the head. Got all new OEM hardware and gaskets and reused the manifold as it looked fine to me. While doing my 02 sensors this past weekend I noticed the same bolt location but on the drivers side has snapped off in the head as well but it is not leaking yet. When the time comes I will be doing headers on both sides with OEM gaskets and possibly hardware. On a side note I think I would rather do this job again than deal with that passenger side 02 sensor again mainly because of the electrical plug.
passenger side done around 90k and the truck now has 125k with the drivers side needing to be done
passenger side done around 90k and the truck now has 125k with the drivers side needing to be done
Last edited by RA010223; 05-24-2016 at 01:37 PM.
05-24-2016, 01:49 PM
#17
Mark
iTrader: (1)
I would suggest a stainless steel stud and nut set.
10-24-2016, 09:33 AM
#18
Senior Member
Since I posted in this thread I would like to update my response.
I cheaped out and used a Doorman manifold. IT lasted 8 months and started leaking. The warranty replacement lasted only 2 months and is now leaking.
I am going to do the job one more time with an OEM manifold this time. Likely used but milled back perfect flat. This is on the advice of a mechanic friend that does these often. So long as they are not crack, they send them out to be milled (under $50 Canadian) and put them back on with new studs and gaskets. Never have returns for issues.
I cheaped out and used a Doorman manifold. IT lasted 8 months and started leaking. The warranty replacement lasted only 2 months and is now leaking.
I am going to do the job one more time with an OEM manifold this time. Likely used but milled back perfect flat. This is on the advice of a mechanic friend that does these often. So long as they are not crack, they send them out to be milled (under $50 Canadian) and put them back on with new studs and gaskets. Never have returns for issues.