ok i dont get it i got a 2000 civic ex with a gsr obd2b swap i ran it for a year befor it starting to burn oil. So i pulled the motor and had new oil water timing belt all of them were oem. And oem pr3 pistons put on my stock gsr rods with new oem wrist pins. Then i had new acl bearings put in and i had my motor board and honed to 81.25 mm sence i got oem 81.25 mm pr3 pistons and 81.25 mm oem rings. Also had my crank micro polished and balanced too. i had the blocked decked to be sure i had the head would be perfected. Now for the head i had a 3 angle valve job the valve seats done and had the head milled too and both the head and block were hot tanked. For valves i had standerd super tech flat face valves and new supertech dual valves springs and retainers put in it. Now when i put it all together with arp head studs and oem head gasket with new weapon r headers and skunk 2 intake manifold and act stage 4 6 pluk clutch i ajusted the valves and fired the engine and my motor knocked it only ran for like maybe 3 mins. So i pulled it and sent it back to the machine shop they over looked it and everything was fine no scares or bad bearings valves were good no piston slap nothing. Got it back put it back in and it still knocked from the buttom end so i called them they came down and heard it for them selfs . they were lost so they told my to put about 50 miles on it so i did and pulled it again and took it back to them and this time they went threw it all plastic gaged the crank check all clearance check wrist pins everything i mean everything and it was all good. but i havnt got it back yet i was wondering if anyone has had this type of problem before like this if so can anyone help me out.

 

First of all...God damn man!! Use some punctuation. It makes it a lot easier for us to help you when we can read what you posted.

I would take that engine elsewhere. The simple fact that this machine shop is using plastigauge to assemble your engine is scary. I thought professionals used precision tools.

 

And that they told you to drive it for 50 miles?
Jesus...that's their troubleshooting procedure?!?!?!

 

Reading your post gave me a head ache. For the love of god use punctuation and paragraphs. Take the motor to a good machine shop.

 

lol there a machine shop everyone i know that deals with hondas told me to go there about 80 percent of there motors they do is all honda motors

 

i meant they used plastigauge to check the mains and rod bearings alot of machin shops use they just about everyone i know use them what elsa could you use

 

What letters were now stamped in the sides of the combustion chamber? IN?.

 

yea if they werent wouldnt it bend my valves?

 

dude, plain and simple you should CLEARLY know that it was obviously not put together right. and if what you say is correct about whomever did this work... i would honestly just do it myself, Good Lord the Haynes manuel will give you better advice than that haha.

 

Ummmmm....precision tools. Namely a good micrometer set and bore gauge set.

 

Find out what THEY say the rod and main clearances are measuring. Then take it to another machine shop and verify what they said. Sounds like maybe some improper assembly occurred...
Motors knocking and they tell you to drive 50 miles?!?! I would not ever go near them again if it were me...

 

lol i swear after one person builds a motor everyone is a pro...lol but its all good they found out the problem i guess honda ****ed up when they sent the pistons to me they sent 3 81.25 mm pr3 pistons and 1 81.00 mm piston wow what a **** up lol can you believe it even honda make mistakes lol

 

That wasn't Honda's mistake. The person assembling the engine should have caught that very easily. I wish I could make that mistake with a $80k diesel engine...hmmmm...

 

True. Still the shops fault. They should have mic'ed each individual piston, then bored each cylinder + desired clearance to each specific piston.

There are very few good shops out there these days.

 

lol wasnt hondas mistake are you high dude its HONDA lol they sent me an 81mm piston when i order 81.25 mm pistons and wtf does diesel have todo with hondas lol bro you need togo to a hole other web site bro

 

And if your builder had a brain, and did things properly, the pistons never would have been placed in their respective bores without being measured (mic'd). If this was done it would have been caught. On top of that, a piston that is 81mm and placed in a 81.25 bore clearly does NOT look right. Especially when viewed against the 3 other cylindes. You sir, are the fool or as you like to put it "high".

"Whole", not "hole". Bro.

 

I give up.

 

lol this guy is so funny ("Whole", not "hole". Bro.) lol i love it when people try to make others on the internet look stupid because they had a miss type lol. What a bum lol. And another thing all 4 pistons looked the same jackass even the colors of the pistons. So next time dont try and be a smart *** just try and help someone out ***.

 

Dude you do not need any help, your doing a great job yourself

Never argue with a moron, they will only drag you down to their level and beat you with experience

 

Was trying to help you out....by telling you your builder is a moron. Read what I said carefully. It would have been easy to see the piston was too small when it was installed in its bore. No **** all the pistons looked the same. Theyre all oem cast. The colors dont change as the bore size goes up. And i dont know a human in this world that can look at something and say, yep, that piston is 81mm. You don't assemble a motor by "looks" you fool. You do it with precision measuring equipment, a step your builder decided to skip. Keep defending him all you want. I don't care. He's not my builder. I can see you don't understand the proper method of engine assembly. If you did, you would understand that his mistake is completely unacceptable for a shop that calls themselves professionals. Its their mistake. And you're to believe its acceptable because you're uneducated in the process.
/my input.

 

OP, you asked for help and now your arguing with everyone in the thread. EVERY engine assembly process should at least consist of mic'ing the pistons. Go cry somewhere else your annoying and dumb.

 

this is where they should have noticed the wrong size piston. (when they were checking p2w clearences, they DID do that, right?)
how did 'they' look at it? should of had it in the car so 'they' could hear it run.(strike 2)
ok, that's enough, your shop definitely sucks

 

who ever put motor togethr didnt know wtf they were doing and should be sweeping shop floors or they just didnt give a f&*k

 

Think this thread has had enough bumping fellas. Ignore the poor soul

 

The OP's question has been answered, so I think this thread has run its course.