[MENTION=46681]awpsome[/MENTION] , thanks for all the info. i appreciate it. i was saying the same, looks like its a time consuming job for sure and hate to do the tearing apart 2 times, but also at this time of the year, i think i may have to do things more on a budget and to do the harness, gaskets and swap each sensor for now and see what happens. looks like ill be tearing into it very soon. ill probably be taking pics to post on a thread showing a process. i do appreciate your suggestions and offering help. happy holidays!
no problem, i found a few pictures from when i did my swap, none of the actual swap but some that will help you understanding the overall situation better.
Yeah I'm kicking myself for just doing the wire harness and not the sensors. I'm still throwing the P0325 code and have to go back and re-do it all. I replaced the gaskets when I did the wire harness and I'm hoping they'll still be good and I can get it all apart again without damaging them. It was a pain in the arse, especially some of the bolts and nuts towards the back of the lower intake manifold. You don't have to disconnect the fuel rails though. The write up I read the guy disconnected them. You don't have to do that.
Yup exactly what i didnt want to end up having to do.. tearing it apart more than once. If i remember correctly, i did not disconnect the fuel rails either. just lift them up as a unit.
Before I order my sensors, [MENTION=46681]awpsome[/MENTION] can you confirm both knock sensors are the same part number?
Yes, i ordered two of the same knock sensors.. ill post a picture below on this reply. both were Denso and part number is on the picture on the box.
Airtex 5S2254 which is just the box i think and the distributor. its denso stamped inside.
I've had the same issue on my own vehicle and many others. I've always replaced both sensors and the harness. It's the best way to have the piece of mind you wont be coming apart again and again. And for me the best way to guarantee the repair to customers long term.
There where 2 Knock sensor suppliers on these trucks. Denso and Matsushita. Make sure you check the markings on the ones you take out and replace it with the same. Mine where Matsushita... could go either way on yours.
If you want to play pinch pennies or just check them out for kicks they can be tested by removing them and hooked up to a DVOM set to AC volts with one lead on the connector pin and the other on the sensor housing/case. Then tap the senor, they should generate a AC voltage reading when tapping them and not when you are not. The FSM only instructs you to do a resistance test. Since these sensors do not operate by changing resistance values but by generating AC voltage a resistance check alone has proven to be an extremely inaccurate way of testing them.
Hell replace it all anyway. But thought some people might be interested to read how you test them or why they still have a code after they only checked resistance and thought it was ok but turned out not to be.
Are you saying that the two brands are not interchangeable?
I'm having new heads put on mine soon, and I have the P0330 so I'm going to replace the sensors and wiring harness as well. Want to make sure I don't have any issues.
The two brand are interchangable.
I didnt pull them out to check what they were first hand then place my order because there was no way i could afford to have my truck down for that long. I needed and wanted to do the swap in one day.
Come to find out i ordered denso knock sensors, two of the exact same model and when i pulled my OEM ones out they were the Matsushita brand. both sides were both the matsushita and both stamped the exact same.
I was hesistent and worried at the time as i was limited to the exact same information everyone else was reading to make sure to keep the brands same and such but i have been running them for close to a year now and have not had any issues or had my check engine come back. so its perfectly fine.
Now to reply to everyones post with some photos, because we all love photos.
Here are a few from my swap, but none of the actual swap just some photos in between to show my journey on the swap.
Felpro intake gasket part number:
Felpro gasket:
Comes with (2) lowers and (2) uppers
OEM knock sensor harness and part number:
close up of the harness clips:
Knock sensors and part numbers:
This was in the box, Denso Goodness:
bottom view and stamp:
an image of the job half way:
OEM Old knock sensor on the left
Denso NEW knock sensor on the right
you can faintly see the "M" stamp on the sensor
Looks like some slight changes:
old harness attached to the second "M" stamped knock sensors.
both OEM sensors were of Matsushita brand
By the way, to treat myself, this just came back from paint the day after the knock sensor swap:
Hope this helped if anything. good luck to those who are going to do the swap.
I just want to comment, i never had ANY issues with changing from the original Matsushita brand to the new Denso brand.
No check engines ever since and truck runs perfect.
my recommendation after the install, do the entire swap at once.
both sensors, the harness, and the gaskets.
do not cut corners.
you will just find yourself doing the swap more than once and it is not worth it.
here are some documentation of the swap i found in a txt file in my folder
Part numbers:
sensor89615-12050
harness82219-34010
intake 17177-62060
Ordered from Rockauto
$232.30 for (2)Denso Knock Sensors
$91.96 for (1)Felpro Intake Manifold Gasket set Upper and Lower
Ordered from Ebay
$31.00 for (1)Knock sensor Wire Harness OEM
TOTAL:
$355.26
Above are the prices i spent and i think include shipping to hawaii, so those of you on the mainland will probably get them cheaper. i cant remember if those include shipping costs or not. i can double check if anyone interested.
