SDPC Tech Tips: Adapting a Gen 4 LS block for a Gen 3 Knock Sensor
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- เผยแพร่เมื่อ 7 ก.ค. 2024
- In this video, Nick goes over the process of drilling and tapping a Gen 4 LS block to accept the knock sensor from a Gen 3 harness. It's a simple process, but it's an important one to cover when making this swap.
Have other questions, ideas, or anything you'd like us to cover? Comment below, we'd love to hear from you!
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Hey man I been searching for a week trying to find the answer to this very question. It was exactly what I was needing to know. You guys were awesome. Now I can finally stop worrying 👍
If you can do a video on cam sensor swap that'd be great if there was a way to relocate it to the back like a gen 3
Thanks for posting this.
Very detailed instructions and to the point good video
Awesome Video! almost had my engine installed without doing this!
Thank you for this
I'm putting a gen 4 6.2 in my 4.8 van. More of these videos would be extremely helpful
how did work out?
@@bigshotpep7500 made too much power for transmission to hold so waiting on new built one to come in rn lol
@@bigshotpep7500 and we ended up deleting knock sensors completely with the tune
Nice tip! What about relocating the Gen3 from the valley on a Gen3?
Thanks for info good vid
1:30 please explain I have the lingenfelter harness 58x-24x what else would I need
Just so people know, you should never cut threads without oil lol,
also you can do this to a gen 3, if you have a nice intake and don't like the look of the valley cover
Hello.., I had a ls3 on my 2008 corvette, I'm going with a 5.3 ls, but my ls3 has 2 knock sensors just like you were talking about, my problem is use the same knock sensors but I put one right on the block between oil pan and block,, you know on the little metal block squares ,, on one side , but the passenger side doesn't have those little squares, I end putting it on the leap of the block , between oil pan and block, do you think this not gonna work..? Thx, oh I am still working on engine not on car yet,, thx again,,
Thanks for the video. This appears to be the aluminum block. Will that tap method work just as well on cast Iron?
Yes, use some oil to lube the tap
When choosing a 6.0 ls, which is the better one to go with? Gen 3 or 4, and is 2012 l96 a gd one for a swap for a 55 Chevy belair?
It makes a LOT more sense to me to change the threads on the sensor (as I did with my LY6 installation into my 2000 Silverado) since knock sensors are much cheaper to replace if you screw up compared to a block. Plus, the gen IV sensors will still fit if your tuner can work with them. And, it's much easier to change the threads on the sensor at your bench than changing threads in the block while it's in the vehicle with all of the potential obstacles. It just makes more sense all the way around, IMHO.
How would I do that cause I feel more comfortable
@@mikeverything4098 it helps if you have a lathe so you can turn the threaded area down to the proper size for the threading die. It can still be done without a lathe, it just takes more time. Typically you'll hold the part in a vise and use strips of sand paper to work it down to size.
I don't remember the thread sizes but that's easy to find online or from the Gen IV knock sensors you may have on hand. If nothing else you have the block.
I've read conflicting information about wiring Gen IV 2 wire knock sensors into a Gen III ECU that expects a 1 wire sensor. That would be ideal but so far I haven't seen any certainty about it working. Good luck with whichever way you choose.
I was thinking about re-threading the knock sensor as well to make it smaller.
@@colingoede5705 on the side of block
@@renaissanceman7145 Some info I have found during my research, not sure if correct. Note it appears knock on Gen IV also pulls throttle position (electronic throttle) on knock, not just timing.
This is what efilive shows:
"The PCM can be used with two types of knock sensors, this parameter allows you to select which type of sensor is fitted to the engine.
(This is available in HP tuners so seems to be correct)
The standard LS1 sensor is a resonant type, these sensors are connected like so -
Sensor Bank #1 - J1,pin51
Sensor Bank #2 - J1,pin11
If the engine is fitted with flat response sensors (like the LS2 uses), then the connections are like so -
Sensor Bank #1 GND - J1,pin49
Sensor Bank #1 Signal - J1,pin09
Sensor Bank #2 GND - J1,pin50
Sensor Bank #1 Signal - J1,pin10
Part number for the new flat-response sensors: 12623730
Adaptor harness: www.amazon.com/dp/B082WMTSN5/
So repining the sensor signals needs to be done:
Sensor Bank #1 Signal - J1, pin 09 - was pin 51
Sensor Bank #2 Signal - J1, pin 10 - was pin 11
Change sensor type in ecu - then change settings - to what?
Is there any way to install a knock sensor on my big block, 402, 1970 Nova and make it work?
Do you to re tune the car if your relocating the knock sensors?
Pat G Tuning the Best Tuner Around
Where can I relocate knock sensors on a LS1 engine in my 2002 Camaro?
I've seen a video of a guy on a silverado putting his knock sensors on the front side of the heads too. Wondering if its a good or bad idea.
Honestly I'm just lazy and not wanting to take the manifold off but didn't really think this would work and if its needing tune to change locations its not worth it unless your doing a engine swap or whatever the case may be.
Since your on the topic of knock sensor would you also have to change the crank from a 24X to a 58X or can you change the disk from a 58X to 24X reluctor wheel?
You can change the reluctor itself and have someone weld it.
Or buy a $200 harness from lingenfelter
The Lingenfelter box only works on 58x reluctor to 24x ecm. There is no way except changing the reluctor to use a 58x ecm.
I might have missed it but what if I want to put a gen3 in a gen4 car?
Honestly, you'd be better off selling the Gen3 and building a Gen4.
Thanks. That’s exactly what I did
How do I convert a 4.5 block to my harness that goes on a Ford F-150 1999 I'm having a big problem here someone help me please
I’m putting a gen4 into my gen3 single cab and was wondering what timing damper should I be using if I’m going to use the lingenfelter TRG. I’ve been told to use the 4x but also seen where people use the 1x.
You can run this one, some of the early Gen 1 blocks did not have a damper or even bolt holes for installation.
sdparts.com/i-24096350
Also what about the big sprocket? Do I use the 4x or 1x
@@ikemunoz951 use a 1x timing set for a 2005-2006 GTO, cloyes part number 9-4205S. I have been researching this as well and just found this information. I also found wire extensions on eBay for the cam sensor and the two knock sensors.
@@williamb2013 we should all make a lil group for gen4 in gen 3 I’m getting ready to finish up my build I used the 4x cam gear and the lingenfelter 24x-58x harness will I need anything else
@@mikeverything4098 I’m in the process of rebuilding an engine for mine. Putting an LC9 where my L33 is. Making a few changes, like a new 24x on the crank. Gas grill came in handy for that.
I recently had a 6.2 ls3 installed in my 06 Chevrolet Silverado 5.3 , they deleted the knock sensors completely, they tried to use the the 6.2 knock sensors with a harness. Said they wouldn’t read. Never tried this. My question is can this cause very poor fuel mileage. I’m talking like 5-6 mpg , it’s awful. I think it’s my problem but I’m not a tuner , the shop said it’s fine. Any help
Would be appreciated. Thanks
Can someone help me out. 7 months and still no answers , thanks
Are you always in power enrichment?
Im puttin the 99 ls1 in my 08 silverado?! Plz help what parts do i need im so confused
The only way is to swap the reluctor ring and cam gear to the newer style.
@@Sdpartscenter yall have the part numbers? That would be the true blessing
What about harness options? Since they are not in valley anymore
Caspers 109081 harness
sdparts.com/i-24110029
@@Sdpartscenter will I still need this if I have the trg 002 from lingenfelter,if so will I need any other harnesses I have a 98 trans am with a ls1 going to put a l9h(6.2) ls3 conversion in the car
So if I drill and tap my gen 4 block for gen 3 sensors to use with 24x stock ecm and later decide that I want to use a holley ecm and go 58x, do I need to convert back to gen 4 knock sensors that are only 8mm in size and if so, how do I do that when the holes are drilled for 10mm due to the gen 3 knock sensor conversion?
If you go back to 58x/4x you will have to go back to the Gen 4 style knock sensors.
Drilling and tapping the side of the block for the GEN III sensors is kind of a "final solution." If you're looking to convert back in the future, it may be best to rethink your current plans, or you'll have to weld up the holes and re-tap for the smaller thread when you convert back.
@@Sdpartscenter wouldn’t a helicoil work to get back to the original size?
@@williamb2013 I don't see why that wouldn't work. 👍🏻
Re-thread the knock sensor instead of the block..
I have been wondering what it takes to put a gen 3 in place of a gen 4? Swapping a gen 3 6.0 into a gen 4 4.8 truck. Main concern is it having a 24x reluctor.
You would have to remove the crank and install a 58x reluctor.
Options are:
• Install 58x reluctor on crank
• Buy a gen 4
• Install holley terminator or other standalone that allows you to select reluctor
@@Sdpartscenter thanks. I knew the reluctor was different. I just wasn't sure if there was another way.
I wanna see gen 3 swap into gen 4
You said, don't use the gen 4 knock sensors in a gen 3 block because of the tuner probably can't get them to work properly. If thats the case does that mean the tuner doesn't tune actual gen 4 engines in 2008+ GM car or truck? Most experienced tuners you would assume if they can tune a gen 4 engine that they can tune gen 4 knock sensors in a gen 3 block
Is this the knock sensor to use for the 0411 PCM?
Correct, it's the single wire setup.
Knocking sensor that's on my 4.5 block to a Ford F-150 1999 wire harness I'm having a problem here I bought this truck with this block in it and it was not the original motor so if someone can help me please be an angel I'm having a problem with the knocking sensor I don't know how to hook it up where to hook it up there was no clip on wire harness on truck
I learned the hard way not to wash my LS 1 engine. The intake appears sealed but isn’t and water gets to the knock sensors
Me too
damn son, so i'll be able to use my 411 pcm to control a gen 4 block? ls3 l76 Etc?
Ict Billet makes adapter pieces so you don't have to drill
Will that work for a gen 4 6.2 engine i originally had a gen 3 4.8
?
A waste of money don't use them especially if you plan on using long tube headers it won't be enough room to screw in the knock sensors
@@jessicawatson-english5505 thats good to know
What about a video of a gen3 block going in a gen4 body
You can't convert up the signals from 24x to 58x so you have to remove the crank and add a 58x reluctor wheel. For many it's just easier to sell the Gen3 and get a Gen4.
@@Sdpartscenter the ls2 for late models gto’s are 24x and use the side crank sensors.
My starter hits the knock sensor.
Ls7 is not a 5.7 it is a 7.0
Never blow out metal shavings with your mouth unless you like metal in your eyes. 🥴