ATTN: ENGINE BUILDERS: Crank very hard to turn!
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ATTN: ENGINE BUILDERS: Crank very hard to turn!
I have a B18A1 block bored .5mm over, cp pistons, eagle rods, and gsr crank, oem acura bearings and thrust washers.
To get to the point I thought maybe I bent a valve and that was why my crank was hard to turn. Today I pulled the head and is was perfectly fine. So I tried to turn the crank by hand and it is still very hard to turn at a certain point in the rotation (when all the pistons are about even and when the 2nd and 3rd piston are on the up stroke). The tranny, axles are still connected to the motor. The oil pan is dropped and inspected and the bearings look fine (without tearing them open just yet.)The crank was purchased used and inspected by myself, it was never micropolished or checked for roundness.
My question is what are all the things that could cause the motor to bind at a certain rotation, and spin freely everywhere else in the stroke. My findings have led me to believe a spun bearing, but there are 400 miles on the break in. Please let me know...its my birthday today so my birthday wish is for everyone to respond with everything that could be the culprit.
Thanks.
To get to the point I thought maybe I bent a valve and that was why my crank was hard to turn. Today I pulled the head and is was perfectly fine. So I tried to turn the crank by hand and it is still very hard to turn at a certain point in the rotation (when all the pistons are about even and when the 2nd and 3rd piston are on the up stroke). The tranny, axles are still connected to the motor. The oil pan is dropped and inspected and the bearings look fine (without tearing them open just yet.)The crank was purchased used and inspected by myself, it was never micropolished or checked for roundness.
My question is what are all the things that could cause the motor to bind at a certain rotation, and spin freely everywhere else in the stroke. My findings have led me to believe a spun bearing, but there are 400 miles on the break in. Please let me know...its my birthday today so my birthday wish is for everyone to respond with everything that could be the culprit.
Thanks.
#2
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
So the motor has been ran? did it exhibit any problems while running if so? why did you tear it down?
You will need to disconnect the trans and any other accessories to eliminate the possibilities of it being something other than your rotating assembly.
Did you at least plastigage your bearings before assembly to check your clearances? I usually always spin the crank by hand when the bottem end is assembled just to check everything over, some even use a torque wrench on the crank to measure the amount of resistance the rotating assembly takes to turn. There are so many things that could cause your problem, its just a matter of using process of elimination now my friend...
You will need to disconnect the trans and any other accessories to eliminate the possibilities of it being something other than your rotating assembly.
Did you at least plastigage your bearings before assembly to check your clearances? I usually always spin the crank by hand when the bottem end is assembled just to check everything over, some even use a torque wrench on the crank to measure the amount of resistance the rotating assembly takes to turn. There are so many things that could cause your problem, its just a matter of using process of elimination now my friend...
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
you need to remove your trans to be sure
but things i know it could be would be the endplay on your crankshaft, its what thrust washers are for.
rod bearings or main bearings
piston to bore clearance
i rod clearance between the crank throws could be too tight
the list goes on and on...
but things i know it could be would be the endplay on your crankshaft, its what thrust washers are for.
rod bearings or main bearings
piston to bore clearance
i rod clearance between the crank throws could be too tight
the list goes on and on...
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
So the motor has been ran? did it exhibit any problems while running if so? why did you tear it down?
You will need to disconnect the trans and any other accessories to eliminate the possibilities of it being something other than your rotating assembly.
Did you at least plastigage your bearings before assembly to check your clearances? I usually always spin the crank by hand when the bottem end is assembled just to check everything over, some even use a torque wrench on the crank to measure the amount of resistance the rotating assembly takes to turn. There are so many things that could cause your problem, its just a matter of using process of elimination now my friend...
You will need to disconnect the trans and any other accessories to eliminate the possibilities of it being something other than your rotating assembly.
Did you at least plastigage your bearings before assembly to check your clearances? I usually always spin the crank by hand when the bottem end is assembled just to check everything over, some even use a torque wrench on the crank to measure the amount of resistance the rotating assembly takes to turn. There are so many things that could cause your problem, its just a matter of using process of elimination now my friend...
I plastiguaged everything while installing the crank and rods. The crank spun fine when I assembled it.
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
you need to remove your trans to be sure
but things i know it could be would be the endplay on your crankshaft, its what thrust washers are for.
rod bearings or main bearings
piston to bore clearance
i rod clearance between the crank throws could be too tight
the list goes on and on...
but things i know it could be would be the endplay on your crankshaft, its what thrust washers are for.
rod bearings or main bearings
piston to bore clearance
i rod clearance between the crank throws could be too tight
the list goes on and on...
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
in general you gotta check your clearances in the engine(rod&main bearings, pistons to bore.........is there any sound associated with the hard spot? i doubt the tranny would have one spot where it binds but its free elsewhere.....BUT it is possible.
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
and btw guys, plastigauge is garbage. its ok if you are rebuiding to stock for grandmas car, but anything performance oriented needs micrometers.
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#8
Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
is the transmission in gear? are there spark plugs in the cylinders? is the timing right? look at the valve train when you are turning the crank and see if you see any valves sticking or anything unusual.
#9
Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
i built my B18A1 with wiseco pistons and ACL bearings. Did the same thing, still does to a cetain point. new parts IMO are the culprit. i know for a fact that i dont have a spun bearing or anything else. like they said, a micrometer/ inside/outside caliper is the way to go. i hit everything with a measuring tool. she runs like a raped ape. as for shutting off. which mark did you line up on your crank for TDC. if it is at the ignition timing mark, your like 16 deg advanced and that would cause it to shut off. the hard turn on the crank should not meen anything. but, tear it down again to be safe if thats what u wanna do. G.L.
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
I was going to get a micrometer to heck clearances. Where can I buy one at though. The is no sound associated with the hard spot. Thats why Im so stuck
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
The tranny has been check in gear, out of gear, clutch in, everything. The head is off. The timing belt is off. Valves are perfect!
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
i built my B18A1 with wiseco pistons and ACL bearings. Did the same thing, still does to a cetain point. new parts IMO are the culprit. i know for a fact that i dont have a spun bearing or anything else. like they said, a micrometer/ inside/outside caliper is the way to go. i hit everything with a measuring tool. she runs like a raped ape. as for shutting off. which mark did you line up on your crank for TDC. if it is at the ignition timing mark, your like 16 deg advanced and that would cause it to shut off. the hard turn on the crank should not meen anything. but, tear it down again to be safe if thats what u wanna do. G.L.
#13
Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
well, money dont grow on trees so being careful is good. and no sound was associated with mine either. Run her till she blows! i was worried to but if u are confident in your work and know for a fact you forgot nothin, the way you make it sound, you should be good! but if its torn down, hey, checking cant hurt. buying a Micrometer or caliper set can run u 50-150$ depending on quality. Sears, lowes, i got mine from grainger supply.(i dont know if i spelled that propperly.) any other questions and i will help best i can. P.S. i built her sturdy and i run her very hard some times(I.E.) 330 am freeway runs at retarded speeds, so that may ease your mind a little and we have the same motor. What trans u have?
Last edited by Beantown; 01-06-2010 at 09:42 AM. Reason: content
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
Okay I will go by sears first after school then lowes and try to find a micrometer. Even if its not the crankshaft im pulling the crank and having it micropolished no matter what. Since I found half a bolt in the oil pan my findings have led me to believe something is binding in the oil pump (which was not brand new) So I am pulling that first today, then going from there (i.e. bearings). From what I have heard the easiest way to check for a bent rod is by disconnecting the rod from the crank and then trying to spin the crank, if binding does not occur then in fact the rod is bent (and Im calling eagle and telling them it is defective since it was not abused on the break in). Im running a LS transmission, that actually I came to like very quickly, I hate b16 trannys because of such short gears, but I would love a gsr tranny but too much $$$.
#15
Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
wow. eagle make an awsome product. to see you say that a rod may be bent is disheartening. i have built other b18s with eagle rods and the crank is still to this day still hard t turn. 3 yrs ago. have the rods checked for straightness before you return them, this will give you the proof you need to have Eagle replace them free. it'll save you time and agrivation. send me a pm and let me know what happens, im curious.
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
wow. eagle make an awsome product. to see you say that a rod may be bent is disheartening. i have built other b18s with eagle rods and the crank is still to this day still hard t turn. 3 yrs ago. have the rods checked for straightness before you return them, this will give you the proof you need to have Eagle replace them free. it'll save you time and agrivation. send me a pm and let me know what happens, im curious.
#19
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
You should probably find out where that bolt came from. Then figure out how it got dropped in your engine, or why something wasn't torqued down enough to have a bolt let loose. And something like that is not an issue with a rod being faulty.
#20
Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
wow 250. awsome. and i agree with the rods not bending under normal wear. and i would def getem checked before a return if thats what u wanna do. all they have to say is that you bashed on them or dropped them or somethin and thats it, i've heard companys say they checked them and there fine....and they werent! i've seen it before. if u getem checked and thier bent, and you send them back and they say no refund or there not bent, you have an ace up your sleeve. they really dont wanna give any money back. but i agree. wish you could try to turn my engine to see its ok man. you sound ike you put together a strong build so you should be ok. run it man, RUN it.
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
lets see how it does at 100k. i understand most honda engines are kinda throwaways, but why not treat everything like a race engine built to run 100k between rebuilds? what does it cost in the long run? plastigauge i terrible...........would you trust a micrometer made out of plastic? of course not, then why trust a smaller cheaper piece of plastic to tell you clearances?
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Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
Well the cylinder three spun a bearing. Getting a new crank tonight and hoping that my number three eagle rod is salvagable. **** sucks.
And Im getting a micrometer, plastiguage is better than nothing. Some people dont even plastiguage. The book says plastiguage that is probably why people use them
And Im getting a micrometer, plastiguage is better than nothing. Some people dont even plastiguage. The book says plastiguage that is probably why people use them
#25
Re: ATTN: ENGINE BUILDERS: Crank very hard to turn!
lets see how it does at 100k. i understand most honda engines are kinda throwaways, but why not treat everything like a race engine built to run 100k between rebuilds? what does it cost in the long run? plastigauge i terrible...........would you trust a micrometer made out of plastic? of course not, then why trust a smaller cheaper piece of plastic to tell you clearances?