Thread: Project LQ4 - V8 S10 - Sold.

it bent the side of the bed and blew the tailgate clean off so it's not unscathed. nothing that can't be fixed, though.

I tore the motor down to the heads for a good cleaning.







Started pressure washing in the rain.



I was making good progress, but decided to quit when the lighting rolled in. I'll take another stab at it this afternoon. All the covers and pan are coming off for new gaskets, so I'm really only concerned with making the block clean. All the other stuff can be cleaned individually.

The rear knock sensor hole looks kinda rusty, make sure to throw the foam crap on the intake away when you re-install it. They just trap moisture in there.

Originally Posted by Fivefingerdeathpunch

The rear knock sensor hole looks kinda rusty

It's a mess for sure. The little pin for the sensor actually broke off in the plug. Looks like I'll have to replace the rear sensor and harness.

thats really common, i had to take the intake off a fireds truck for a knock sensor code. rear hole was like yours. only it it was fill of water.

i sealed the foam plugs with rtv, left the front and back foam out so air can flow under there.

That's a very fuzzy picture. lol

it was taken with a very old cell phone , aka potato lol

potato-phones were a LONG time ago, do we have to bring your age into question again? lol

Originally Posted by Scottydoggs

thats really common

Must be that's why they moved them on the Gen 4 engines. (?) I'm hoping it won't be an issue in the future. I don't plan on driving the truck in the rain. The only time that motor should see water will be when I wash it.

i dont have a clue how it gets wet. seems odd. my friends truck the engines never been washed, it sits in the rain but is rarely driven in it as its a landscaping truck, so its parked on rain days.

GEN 4 motors moved the knock sensors because the DoD/AFM that is now in the valley cover. They are also a newer design and likely have a better ability to pick up knock when they on the side of the engine block.


I have a picture of the knock sensors on my old 2006 Sierra that had 250k on it, they looked great.....

id love to know how it gets so damn dirty under the intake too. looks like they are al that bad. this one has less then 50,000 on it at the time.

It has to do something with the draft inside the engine bay I think, it just pushes the dirt in from behind or the rear sides and cover everything.

The engine bay on my 2012 when I bought it with 94k miles was no where near that dirty. It has seen it's fair share of dirt roads and it seems nothing gets trapped anymore. They also do not have the foam inserts on these 07+ engines.

Originally Posted by Fivefingerdeathpunch

GEN 4 motors moved the knock sensors because the DoD/AFM that is now in the valley cover.

Ahhh... I hadn't even thought about that stuff. Makes sense though.

Finished washing it. No lightening this time, so I had no hold ups. So much better.











Let me tell you, Gorilla tape for the win. Held up to all the pressure washer gave it. Granted, I was mindful of what I was doing, but it still impressed me.



The other day, I ordered the exhaust manifold EGR block off. It was cheap enough, and I couldn't make anything that nice for $10. Well, they sent the intake block off by mistake. I was just going to do the freeze plug trick for that. I even already have it on the shelf. Anyhow, they're sending out the right one on Monday and told me to keep the wrong one. So I'll have both block off's for $10! Things are really lining up nicely on this project!

Crazy how clean those southern motors stay. The all aluminum block on my truck has some minor pits and oxydation already, though it's nothing a wire wheel couldn't take away if the block was out of the truck.

I had to replace both sensors and the harness on my Hoe last summer, one of my knock sensor holes had water in it, had to get it all out before I took the old one out.

Originally Posted by Fivefingerdeathpunch

Crazy how clean those southern motors stay.

Coming from the rust belt, I still appreciate this. You really see it on something like a transmission case.

Originally Posted by Slick2500

I had to replace both sensors and the harness on my Hoe last summer, one of my knock sensor holes had water in it, had to get it all out before I took the old one out.

I'm debating doing both even though only one of them looks violated.

It's recommend to replace both and the harness.

Originally Posted by Slick2500

It's recommend to replace both and the harness.

Then that's what I'll do. Thanks.

I had a little free time this afternoon, and the pressure washer wasn't put away yet, so I went nuts. Tired of bumping into things and getting dirty. Not in my garage.

Trans is clean.



T-case is clean and ready to be posted on Clist.



Intake came out nice.



Even put in my freebie EGR block off.

More cleaning. Throttle body this time.



Stopped by the hardware store to grab some shorter bolts since I ditched the spacer. Noticed some chafing on the TB gasket so it'll have to be replaced.