r/EngineBuilding

Rebuilding my 2001 Honda Crv, pulled the engine to redo my transmissions clutch packs and gaskets etc. I degreased the engine after pulling it and left it sitting for a couple of months

I guess I didn’t cover the intake or exhaust well enough and moisture got into one cylinder, I rehoned all of them as they were basically mirror finish but no damage I could see or feel other than that rust.

Would that cause a huge amount of oil consumption or anything else? And is the honing good on the other cylinders? It’s my first time doing an engine I dove head first into the project and learning along the way

What do you guys think is the cause of this? I got this engine which was supposed to be assembled and tested for compression and ready to go. It was supposed to be never started before. I went to start the cam break in and within 5 seconds heard some very awful noises. It’s a 383 stroker small block Chevy not that that matters.

Update: I have not found anything other than piston material, bearing material or piston ring material. I checked all main bearings they all seem fine. My guess is either they forgot to install the wrist pin retainer or something got in there, however I haven’t found what that something is.

I’m trying to find out how many thousands of an inch is an acceptable amount of warping from everyday use but I cannot find a reliable source. I’m no machinist so I have no idea what’s acceptable and what isn’t.

ust 320 grit ball honed my cylinders for the first time ever, howd i do? only did about 10 seconds per, went over the left one twice super fast. can go over again if needed, just wanting some opinions before going further. sorry for the bad quality. video in comments thanks for any feedback! d17a2 cast iron/aluminum

I see a ton of companies advertising pistons to the aftermarket these days as "drop in" saying they match both weight and size of factory pistons.

These pistons are supposed to be for stock bore, stock bore is 4.090", block is torque plate honed to 4.090". These pistons land between 4.088" - 4.0885" and after getting ahold of Mahle are supposed to have .003" P2W.

Not a huge difference but .0015" P2W on a boosted engine absolutely is not gonna cut it.

Hi!, it's a golf mk2 1.6 td, there are some black spots at the corners that I can't get with 800 grit sandpaper. I can't feel the blackspots with my nail. Can I put the head on? Or should I continue to sanding?

Edit: I have measured the deck with feeler gauge with multiple levels to double check and 0.05 mm doesn't fit. So I think I'm good to go. I was worried about the black spots like pitting but since they are not close to the cylinder as you guys said. I think I'm Okey. BTW I removed the head due to water leaking around the head, maybe due tho stretched bolts or not correctly torquing the head. Bought a brand new AMC brand head.

Thank you all for the advices!

One more question, in the manual of the Elring headgasket, it says after 1000km driving stretch the bolts 90 degrees again. First time I came by this procedure (my first cylinder head work) should I strictly apply the procedure?

Wish I had an opportunity to learn to do it for a living.

I’m building a B5234T3 for my Volvo 850 T5 project, target boost 15psi for 280-300hp. The journal feels smooth. I’ve been following the workshop manual religiously and this is the first red flag I’ve found. This is the journal that mates with the thrust bearings if that makes any difference. The rest of the main journals look pretty similar to this, but this is the worst. Asking before I order new bearings for plastigauge. The only other time I’ve had an engine this torn down was on an LS, and that was years ago in tech school.

Long story short: I bought a 5.3 L83 block off of FB marketplace. The gentleman I bought it from stated it had DOD delete plugs installed, but all I see are these threaded holes.

Am I missing something here?

While replacing the head gasket on my m57 engine i found out that something had gotten on top of the piston on cylinder 6. It has made marks on the head and piston.

Hi all.

On one of the cylinders of this engine (2002 Honda CBR954) I noticed that half of the exhaust port is very white, also 1 of the 2 valves. The other cylinders all look normal, like the left side of this port. Engine was running fine.

Does this indicate a possible issue? Or will this go away/is fine.

Thanks!

Used oven cleaner to wash my block and it left this, how do I get it out and is it harmful to the block?