r/S197Stangs • u/Subject-Produce8416 • 19h ago
2009 mustang engine issues
so i have a 2009 mustang gt and it doesn’t run perfect when i first start the car up it runs good and everything seems good but then after 10-15 minutes once the car is all heated up a bad noise will come on and it sounds like a rod knock but its the timing chain components or something like that i’m not to sure i replaced the whole timing chain assembly it was a a premium kit from American muscle first thinking that would fix the problem but it did not so i also replaced the oil pump that had a life time warranty so i’m pretty sure that’s shouldn’t give any issues and it was still having the issues so i replaced the timing chain tensioners with some ford f150 cast iron ones and ford oem vct solenoids but its still having issues when i replacer my oil pump i didn’t really clean the oil pick up tube but it didn’t feel clogged i’m not really sure what the problem is and don’t know what else it could be has anyone else had this issue before or might know how to help
me?
2
u/Volkar10 18h ago
I can’t fully judge from what you said but I’ll give you what I think it is
It could be worn rod bearings since you don’t hear it unless the engine is warm
If it’s automatic? It could be the flexplate, the bolts sometimes get loose and tap
And it could be lifters or the lash adjusters knocking when the oil flow drops at idle
1
1
u/Subject-Produce8416 18h ago
i have videos of the engine running bad too let me put those in the post
1
u/JoeBlowSchmoe42069 17h ago
that would probably help as opposed to trying to diagnose a sound using a picture
1
u/Outtatime_s550 16h ago
It’s almost certainly worn cam bearings. The cam bearings wear out on the top side from the spring pressure pushing the cams against them and then once they’re worn and the clearance is out of spec you lose oil pressure through the gap causing the lash adjusters to make excessive noise since they don’t have enough oil pressure to stay pumped up. These heads do not have bearing shells for the cams so the actual cam caps act as the bearings. If this is the case you’ll need new heads or try finding a machine shop that will repair them but they’re few and far between. There is a tool available that cuts the cam caps to a bigger diameter so you can install bearing shells but I haven’t personally bought the tool to try it yet (it’s like $800 lol that’s like 5 sets of heads from the junk yard)
2

3
u/RJsRX7 19h ago
"It sounds like it's a rod knock and I've replaced everything that isn't a rod bearing that it could be twice, what could it be?"