bolt in spark hole and cranked engine :(

[karlnissan]

Hey guys,

I have some bad news I brought my 2nd hand engine 4 days ago from japan an rb25det was very happy with it, as I was trying to get it running i must of somehow droped a bolt into cyl #1 I never noticed this untill the engine stoped cranking over im guessing I have done some major damage inside there, the engine never started as I had the fuel going in the wrong way the hole time so it was just cranking on the starter I did notice a wierd noise coming from the engine and thought nothing of it but after geting a magnet down the hole and picking out crashed bolt or large screw hard to tell its just mashed metal, thats when i knew.

I am so angry with myself for not seeing this, I only know the basics when it comes to engines and I have no idea how bad the damage is, is it a throw away or is one of the valves stuck open witch is causing the engine to stop at a certen point?

How bad do you guys think it is pistion gone? cyl wall damged? or just a bent valve please tell me its just a valve it took me 2 years to save up for the bigger 25det and 4 days later I have done it in what luck.

what do you guys think i should do give up on it all together? or do you think I have only bent a valve and can just replace the one valve without geting the head machined and what not. money is very tight as I stated before took me 2 years to save $2500 should I give up?

sugestions please.

Thanks guys.

[frapjap]

The only way to really answer your questions will be to remove the head to inspect the valves and then, while the head of off, to turn the engine over by hand to see the cylinder that you dropped the bolt/screw into.

Don't lose all hope, but do cross your fingers. You may get somewhat lucky, but you won't know until you inspect.

[themadscientist]

Do a compression check. You might have just jacked up the piston crown and head casting. The valves might not be bent.

[PapaSmurf2k3]

It took you 2 years to save $2500? Holy crap man, you might want to re-think your plans. Modified cars (especially with RBs) require a lot of money and attention.

And yeah, either way if you damaged your block or head, you're probably looking at about $750 to repair on the low end. This is if the damage is only to the head. You'll have to remove it, replace valves, PRAY the surface didn't get dinged and pitted too badly, re-surface the head, buy all new gaskets and head bolts, and hope the cam is ok.

[karlnissan]

well i have pulled the head to find massive damage it appers it was not a bolt it looks as tho the thing i thought was a bolt is actually a peice from the valve steem but i cant be sure the head has massive damge and the vavle head was sitting on the piston when i pulled the head the really stupid thing is I wont get the warrenty now that i have opend the engine up my life sucks.

yea it took me a long time to save but thats becuase I have alot of out going payments I do earn above avrage but my teen choices are catching up with me.

[Josh@NSP]

If you had a warranty, why on earth would you go into the motor? Your life doesn't suck... You did this to yourself. Just so you know, if you intend to put that motor back together the head must be shaved. It won't seal otherwise and especially if you don't know what you're doing. Care to tell us where you got the motor from?

[karlnissan]

I got the motor from trademe, the engine rebuilders I deal with said the head will not need to be shaved but I will need new head bolts of course and a head gasket, I think im just going to wait for some money to come in and get a new set of pistons and a new head that should solve my problem maybe looking at 2k for that. I will just need to confirm the bore is not damaged even maybe 2nd hand pistons with new rings with a clearnace check should be ok? I found a head for $200 but cannot confirm the condition as its 2nd hand.

Well I dont really think I did this to myself who on earth would kill there new engine makes no sence? anyway I will just have to move foward on this issue and hope the future brings me a little more luck its almost the new year fingers crosed I have some pictures of the damage if anyone is interested?

[Josh@NSP]

If the engine builders told you that you don't need to shave the head, you may need to find new engine builders. And I wasn't saying you killed the motor, I was referring to you opening the motor without checking into the warranty first. Pics would be great. BTW, I rebuild Nissan motors for a living, I have photos on my shops facebook (www.facebook.com/nsperformance1) of an RB I just rebuilt this week with a very similar case to yours. Metal got lodged in a valve, stuck open, hit piston, head gasket separated on impact, rebuilt with new head gasket and ARP head studs. The block is iron, the head is aluminum. For that reason alone when the head is removed it must be done so in a specific order and by specific increments. That prevents warping during removal.... So say you did remove it the right way and it didn't warp, it still needs to be cleaned of residue from the previous head gasket. When you do this cleaning, it can often nick the surface of the aluminum causing small burs and depressions.... things you don't want against your head gasket under full boost. So the general rule of thumb for most good engine builders that I know and myself, always shave the head. Otherwise your pissing into the wind and you have no direction which way it's going. You don't want to invest money into a rebuild and have to do it all again because the stupid head gasket didn't seal do you?

[karlnissan]

i guess not... I was just told to scrap off as much gasket as possable CARFULLY then get some 400 grit wet and dry and get the rest off but I guess you are right All that work to save a few dolars would be a wast of time.

just to add I did undo the bolts in the recomended order for removal, I do no the basics of engines im just no expert is what i ment my old man used to race a jetboat and as a kid i was his little helper thats where most of my knowlage came from also google does help alot. but as far as pulling apart a turbo engine I am very new to this.

I do appretiate all your input tho thanks guys

[karlnissan]

http://s1240.beta.photobucket.com/user/ ... 7851962738


http://s1240.beta.photobucket.com/user/ ... 1168030566

those two pictures are of the damage and here is all the effort I put into this swap

http://s1240.beta.photobucket.com/user/ ... 8487539937

here is the paint job I got done about 4 months ago

http://s1240.beta.photobucket.com/user/ ... 0960949236

[karlnissan]

Just an update the company I brought the engine off is sending me a long block at no cost, I am so happy with this outcome thanks for all your input guys

[Dattebayo]

Damn, you got lucky.

[PapaSmurf2k3]

Damn, you got lucky.

+1

[karlnissan]

yes i did get get luckey, but still it may not have been my fault maybe this has happend to that company before. Much much respect for them

[frapjap]

Impressive. Give them a shout out here when you get the block and inspect it. Crummy that the valve broke like that though!

[Dattebayo]

The real lucky part is that it will only take a few weeks to get it. Most places woild make you send it back and wait. Sounds like a real stand-up business you found there!

[themadscientist]

I have an RB25 head if you want to just replace it. It's an RB25DE from an R32, but the casting should be the same.