Help Needed, 4age rebuit, running allmost......

[XS1V]

well i bought the car with the engine not running. Its a bluetop motor from an nz new ae82 fxgt. i have had the whole thing apart, cleaned it all, put in new piston rings and new bearings in the bottom end and everything was at spec according to the book. Put the head on with all new gaskets etc as you do and conected everything up and set timeing etc. Everything has been done following the manual and torqed accordingly

Made sure everything was good and gave it a whirr, all most starts but not quite, if you hold it at about half throttle it starts.... very roughly sounds like its dropping a cylinder and at higher revs, round 3k the valves make a lot of noise.

Do i need to get some head work done, resetting valves etc??
What else could be up??

All help appreciated

[ChaosAD]

cam timing right? Did you strip the head at all? (shims could be wrong if you did)

[ee904age]

Yeah, sounds like cam or ignition timing. Did you have the dizzy out???

[XS1V]

Have double checked cam timeing, have set it up as it was and should be, havent had the valves out just the head off. Yes had the dizzy out but have checked that a few times and its in all sweet

[ATAl]

Are the valves seating properly? One or more may be bent.

[XS1V]

hmm how would i be able to tell that?? have taken cam covers back off and will compare them to another running bluetop i have

[crispy'86]

I'd say it'd most likelt be distributor timing. I've had numerous occasions where the same thing has happened, helping people out who have had dist. out of engine and put back in. You need to line up the two marks in the shaft 1 being the roll ppin that holds the drive gear on and the other slightly further up the shaft

[XS1V]

yea i had distributer sweet, done a few before, have fixed the prob and she runs proper re did cam timeing as i followed wrong timeing dots from the previous owner :S but now i have a knock ahhh never ends does it lol

[ChaosAD]

A knock? you did turn the engine over with no sparkplugs installed to get the oil pressure up aye?

Did you check the crank, rods and block with a micrometer prior to ordering the bearings? or just slap in some 'standard' bearings?

[XS1V]

Yea standard bearings, toyota guys said it would be all good so..... yea i didnt think anything of it. Yes did turn it over without sparkies first. Could be water pump?? was just an idea my mate had as we think it was on the way out possibly

[crispy'86]

Ok, now is this a metallic knock?? Like on accleleration????

[XS1V]

does it at idal, gets louder with acceleration, and yup is mettalic

[Mr Revhead]

that does not sound good.....
did you measure the crank and block/rod journals? were they in spec?

[Jebus]

Wasnt an auto motor originally by any chance?

[crispy'86]

sounds like big end bearing area or even bottom end to me, don't think originaly being an auto would cause any problem as the cranks are same swapping flywheels over etc. I've got an auto engine in my trueno now, no problems like this.