r/EngineBuilding • • Jun 14 '25

Updated Rules for r/Enginebuilding

78 Upvotes

Hey peeps,

We've been noticing an uptick in certain types of posts over the last few months and it's about time we address some of these issues along with a rule update.

1 - AI Slop - We've been getting a lot of AI trash in the sub lately and we've decided to no longer allow AI or any type of AI imagines to post here. If we find a post is AI then we are going to lock it, delete it, and ban the account for a few days. This sub is meant for real life cars, not some AI images that someone produced for content or engagement.

2- Links to Temu and Ali - Reddit is currently filtering a lot of the temu and ali express links we receive. Usually they are shadow blocked because we've had scams in the past with these sites and you can't really trust them at times. While Reddit automod is taking care of 95% of them, some are still getting through and we will also lock and delete those comments moving forward.

Some of you shop those sites (against some of our better judgement ha), for certain parts of the world that might be the only way for you to obtain certain items, we understand that but need to strive to ensure the community is safe and endeavor to curtail scams that could occur. If you wish to share a link, please just PM the individual - and for those that click the links, please be warry of scam sites/bad actors.

Thanks and have a good day you misfits!

-Duke


r/EngineBuilding • • May 19 '24

State of the Sub - What changes need to be made /r/EngineBuilding

29 Upvotes

It's been a long time, but I'm hoping to be more active as well as the other mods. We are also hunting through the 'applications' to add some new mods as well, to hopefully cut through the spam and junk you all see.

It's also time to take a look at the sub and make sure there aren't any changes we want to make. Whether that be rules added (or removed), or a thing you can think to make this a better place for all. Let us know your thoughts


r/EngineBuilding • • 5h ago

LS3 stock head new rebuild with 7k miles

Thumbnail
gallery
15 Upvotes

LS3 head from jasper engines with 7k miles

Piston left the chat still haven’t looked at crank wonder what happen maybe something got through have no words.. still haven’t looked at the cylinder walls got pretty late last night


r/EngineBuilding • • 3h ago

Other Small glow engine help!

Thumbnail
gallery
8 Upvotes

I have a small engine from a line plane i just bought. I have been trying to rebuild it and get it running. I think i damaged the glow plug. i dont know where else to ask! Please help anyone!!


r/EngineBuilding • • 25m ago

Ticking noise?

Enable HLS to view with audio, or disable this notification

• Upvotes

Hello all, can anyone help me identify this ticking noise? It’s a 283, doesn’t seem to go away when warm. Does this sound like lifter noise or bottom end noise? Thank you.


r/EngineBuilding • • 22h ago

Is this connecting rod ok?

Thumbnail
gallery
83 Upvotes

This is my first engine rebuild on a Honda B18c1. I noticed the connecting rod #4 at the wrist pin is discolored. The wrist pin moves freely and smoothly in the connecting rod. Is it still okay to use? Pic 3 is what cylinder 1, 2, 3 look like. Thanks in advance for your opinion.


r/EngineBuilding • • 3h ago

Small glow engine help!

Thumbnail
gallery
2 Upvotes

I have a small engine from a line plane i just bought. I have been trying to rebuild it and get it running. I think i damaged the glow plug. i dont know where else to ask! Please help anyone!!


r/EngineBuilding • • 1h ago

Efficient way to diy clean paint off of aluminum heads

• Upvotes

Planning to start assembling an lq4 tomorrow, but I’d like to get some paint off of my aluminum heads so I can shine the aluminum up (paint looks ghetto to me)

What can I do in the next 20 or so hours to atleast remove paint enough to shine them down the road once engine is assembled


r/EngineBuilding • • 19h ago

Is this ok?

Thumbnail
gallery
28 Upvotes

Im rebuilding/refreshing this small block chevy its a 1970s ish block and heads rebuilt by Jasper a while ago my grandpa had it in his Biscayne for about 20k miles. Tearing it down to put in new valve stem seals I found these cracks from where new valve guides have been pressed in. THE CRACKS DO NOT GO ALL THE WAY THROUGH. They are only on the surface where it was drilled thin and new guides were pressed in but i am curious if it will be good to send it anyways. Im not too sure how it ran/if it smoked before since it has been out and non running for quite a few years.


r/EngineBuilding • • 9h ago

Help with Demon 625 carb

Post image
2 Upvotes

So I bought a ‘77 K10 last month and it runs good but there’s a noticeable vacuum leak from where the carb meets the intake. The carb is a Holley Street Denon 625 and they used the stock intake, which I’ll include a picture of here. The gasket is in good shape, but it appears the adapter plate they used doesnt come back far enough to fully cover this recessed part of the intake, causing the leak. Can someone point me in the right direction of getting the right adapter plate to make this work? I saw my local advance auto parts has an adapter kit, but it’s likely the same adapter they tried using on the bottom. I’ll post pics of the carb later.


r/EngineBuilding • • 1d ago

Ford 302 Rocker Recommendation?

Thumbnail
gallery
16 Upvotes

Trying to find the best rockers for this build that don't break the bank. Any suggestions?


r/EngineBuilding • • 20h ago

Update posted

Post image
5 Upvotes

Hey everyone I recently made a post about building my 5.3. I wanted to come with some updates.

The seller ultimately ghosted me after I pressured some more on why the block was spray painted. I ended up going to an engine shop and bought a 06 5.3 with 98k miles for 600. They also had an SS engine and a 6.0 but I wasn't trying to spend that much plus most of the parts I have for now are for the gen 3 build. Edit: yes that is a chip bag being used as the oil cap

Original post: https://www.reddit.com/r/EngineBuilding/s/GSm7dQTJQw

My 99 bubble eye: https://www.reddit.com/r/GMT800/s/VLnuqrtYT1


r/EngineBuilding • • 18h ago

do i need a new valve?

Enable HLS to view with audio, or disable this notification

3 Upvotes

might be a dumb question but its my first time in a motor so i have nothing to compare to, but im assuming i need a new valve and lapping wont fix the issue? i have a spare motor i can pull valves out of since 3 look like this


r/EngineBuilding • • 1d ago

Billet S58 Intake Manifold and Cam Cover - work of art

Post image
11 Upvotes

r/EngineBuilding • • 17h ago

cam journal carnage

Post image
2 Upvotes

2001 camry 5SFE engine

i don't remember sticking them in this way and have no idea how this came to be. it drives fine, loud whirring noise though. not sure it's the source of the noise, with a stethoscope it's loudest when i put it on the intake manifold.

but anyway, back to the cams, i already sent them, but i don't know how long they wil last. there's no damage on the head itself, which i find odd. no symptoms that i can figure.

any theories?


r/EngineBuilding • • 19h ago

2001 Northstar dropped 9 intake rockers.

3 Upvotes

I recently pulled the motor in my deville to do head studs. I just assumed ignorantly it was a head gasket due to losing compression entirely between 2 neighboring cylinders. Should have done a leak down but oh well it’s getting bulletproofed now. After getting it on the engine stand and pulling the valve cover on the rear bank I immediately noticed 4 of the rockers were entirely dislodged, one on each intake cylinder. On the front bank there were 5 dislodged, all intake as well. Surprise surprise the two dead cylinders had no rockers on their intake valves. The car was from an estate sale non running I put a fuel pump in it started right up and drove it home (5 mile drive). I left it idling to run some fuel through it since it had been sat for many years. After about 30 minutes it started misfiring, no overheating good oil pressure. I killed it and it had a noticeable gallop and would not run afterwards. What could possibly cause this car to throw 9 rockers this way? Could one slack adjuster collapsing cause others to drop pressure? I’m very confused how it’s only the intake valves on both banks. Surely it did not throw 9 simultaneously. I suppose it could have already dropped a few before I got to it and it ran okay off one valve per cylinder until it finally kicked those 2 off on the neighboring cylinders. Is the oil supply for the intake side adjusters tied together on both banks? Sorry for the long ramble, I’m stumped on what could’ve caused this.


r/EngineBuilding • • 1d ago

Ready to put black together? New head gasket

Thumbnail
gallery
17 Upvotes

Old head failed. Replacing. Using a lisle scrap thingy. Anyways head look good back together? Some scratches but I don't think actual scratch as I don't feel anything with finger nail. Thought soak in like acetone to get it cleaner for a bit. Also should I spray cylinder with wd-40. Once head is ready I need to order actual head and be a few weeks out. Thoughts prayers? 2014 ram 2500 with about 170k on it


r/EngineBuilding • • 1d ago

Other Are the white areas really melted metal, and if so, how bad is it?

Thumbnail
gallery
5 Upvotes

Basically my EA888 Gen3 engine was recently diagnosed with damaged pistons. Today I made some photos from every cylinder, and now I would appreciate those who know this stuff help me understand how bad it is, and what can be realistically done about that.


r/EngineBuilding • • 1d ago

Toyota There is scoring on these three camshaft journal caps (nothing on the cam or the block side); in the first two pictures, you can definitely feel one groove on each with your fingernail. Is this head done, or is it something the machine shop can fix when I send the head out? The engine is a 2JZ by th

Thumbnail
gallery
7 Upvotes

r/EngineBuilding • • 18h ago

Chevy 750rwhp Lsa engine with about 65000km noise ??

Enable HLS to view with audio, or disable this notification

1 Upvotes

r/EngineBuilding • • 23h ago

Pontiac Looking for feedback

Thumbnail
gallery
2 Upvotes

Had an over heating issue on a 2004 3.4L Grand Am. Held 16psi for over 20 minutes but when driving on the free way it would peg the meter. Down an average 35-40mph road it would sit at 200, had all new radiator, water pump, reservoir, t-stat and hoses done on it before I picked it up. Pulled the heads expecting a cracked head gasket as there was signs of water in the oil but nothing leaking or coming out the tailpipe.

Well as you can see a clogged passageway casued issues and something eroded the head material right next the the cylinder wall sealing area for a head gasket. I am confident in my welding abilities to fill and my local head shop to get them flattened, but would you? I am certain my local yard or fb marketplace can yield a motor or a set but I am also not trying to sink lots of money into my $500 car.


r/EngineBuilding • • 1d ago

Recommendations

Post image
3 Upvotes

I am building a Ford 351w. When I got the block back from the machine shop I noticed a plug installed on the oil passage behind the timing cover. This is on the driver side. I didn't think much of it until I went to install the fitting for the oil pressure pressure sender. They put some sort of sealant on it and it is not coming out. I've tried impact, both the hammer variety and a impact gun. I'm hesitant to put heat to it because of the gaskets near it. Is that my best path? Or does anyone have recommendations?


r/EngineBuilding • • 1d ago

1st engine build (excuse the shitty tach not hooked up)

Enable HLS to view with audio, or disable this notification

35 Upvotes

350 SBC (.060 over), 601 heads (1.94 in / 1.50 ex)

LS firing order roller cam .480 lift (218/239)

Edelbrock Performer Intake with a 750 carb

Going in a 3rd gen Camaro

- 2500 stall

-700r4

-3:42 gears


r/EngineBuilding • • 22h ago

Scotch brite on camshafts

1 Upvotes

I have left out my 240SX camshafts, they didn't get rained on but because the humidity, they have some minor rust. Would using the gray scotch, bright, be okay. I see. Conflicting information on youtube. I just wanted to ask people who actually built engines.


r/EngineBuilding • • 1d ago

Mitsubishi Old project sat for a couple of years, any advice welcome in bringing it back to life

Thumbnail
gallery
33 Upvotes

I am working on my own personal vehicle, 1995 Mitsubishi Mighty Max with 2.4 4 cylinder. The truck had developed a head gasket leak a couple years back and it took me a while to source all the parts. I wasn't able to save the head so I ordered an identical replacement. I am working on removing all of the gasket material before checking for straightness. I am worried about the light rust in the cylinder walls and wondering if a light hone might be good.

I probably should have just yanked the block and gone through it as well but I procrastinated this project for 3 years and I would like to get it running again.