5k rebuild.

[GJM85]

Hi,
Just picked up an '88 litace 5k that I intend to rebuild for my ke20. I've also picked up a
SC12 supercharger for the build. I plan on rebuilding the engine to suite the supercharger but not fitting and plumbing it until the engine has been run in.
Basically it's out of a liteace, so I assume its got solid lifters, electronic dizzy and it has the AC pulley and bracket.
I plan on rebuilding the bottom end standard with good dished pistons, shim the oil pump, lighten the flywheel and get it all balanced.
The head, port and polish, manifold match and shave. I'll get a cam grind but i'm not entirely sure on the ideal specs for a blown 5k running 6-7psi. I have two 4k's and one 3k motor at my disposal for spares.

I'm asking for any help, tips and things to watch out for when it comes to the cam/rocker assembly modifactions. Compression issues. Any parts I will need to swap from the spare motors.and anything else you can think of that is going to trip me up on the rebuild.

Cheers
GJM85

[KENut]

I would think it has hydro lifters...

Tip: take studs out of timing cover and replace with bolts, same with rear main seal housing
Get rid of casting flash on the head, so oil can escape the rocker cover easily
Rocker post mounts might need to be machined down

Assembly lube is your friend

PS did you get the gearbox out of the liteace too?

[GJM85]

No I didn't get the liteace gearbox. I have ke55 donor car coming, it's a 4k 5speed and I plan on using as much of the driveline as possible. Diff, brakes, gearbox and struts if possible.
Also I think the rear main bearing already has bolts. I tried to pull it off but realised i need to drop the sump first. : P

[KENut]

Liteace gearbox might have been a T50 or L series? Stronger than a K anyway

Cant remember if this only applies to 7K's, you might want to measure the sump to make sure it wont hit the crossmember

Edit: rollaclub faq says most van sumps will have clearance issues, use 4K sump

[oldcorollas]

5K and 4K both use 4K cranks, so sump depth is not usually an issue, although there may be an issue with the van sumps.

be aware there are 2 or 3 different bolt patterns for the sump bolts, even within the car motors.

you can use bolts for the sump to rear main and sump to timing cover, but you run the danger of stripping the threads as those covers are soft, and you may not get the lips to seal as well as if you dropped the sump.

the pistns and head you use will be determined by the CR you want to run. dished piston heads are abotu half the volume of the flat top piston heads, so they are nto so easy to swap around without thinking.

unless you go solid lifters, you probably can't use the 3/4K rocker gear, and the pushrods will likely be wrong length anyway (dependign on your lifters)

rocker tower machining depends on change in valve lift
more lift = good, but may ned change in valve springs. check both spring bind AND the retainer to stem/seal clearances at full lift

[GJM85]

stripped the 5k today. Found it does not have solid lifter and the rocker gear is not adjustable. Kudo KEnut.
I've heard if I use 202 red motor lifter, Datsun 1200 pushrods and the 4k adjustable rocker assembly I should get away with it? Also how will a lumpy cam affect this and what head machine will be necessary?

[KENut]

Yes that sounds about right. From memory chevy v8 lifters are the same dia as red motor, not sure about length though. Dummy fit it all then machine post height down to suit rocker/pushrod/lifter gear + camshaft lift.
Just make sure you will still have enough adjustment in the rockers, ie set them to full out when measuring

[Robbo]

Liteace gearbox might have been a T50 or L series? Stronger than a K anyway

Cant remember if this only applies to 7K's, you might want to measure the sump to make sure it wont hit the crossmember

Edit: rollaclub faq says most van sumps will have clearance issues, use 4K sump

liteace gearbox is a steel case external linkage , alloy bellhousing type box.and hydro clutch .linkages are mounted on an alloy plate bolted to the side of the box..this is the same box as RH22, etc etc hiace and liteace steel case box's.
alloy bellhousing unbolts....dont know what other box it will bolt up to..its hydro clutch ..
these have a larger flywheel to accom a 200mm clutch,
the input spline is the same as the W40/50 onwards box's, same output spline.
i used the liteace flywheel, T18 clutch with T50 from a TA22 in my old Ke38 wagon with a 5K. Bellhousing was a K series with cable type clutch...ooooo how i wish i had kept that box setup
this setup turned it into such a torque monster....blowing many shit box Borgwarner weak as piss diff's

[GJM85]

So i've assessed the bottom end of the 5k. The pistons are ACL's and are in pretty good nick. All the bearings are clean with minimal wear. So as it stands it'll just get a new bearing kit and a ring kit.
Still considering cam specs. I'm going to run with the hydraulic lifters and throw the 4k adjustable rocker gear on it....

[oldcorollas]

Still considering cam specs. I'm going to run with the hydraulic lifters and throw the 4k adjustable rocker gear on it....

what would be the purpose of puting the adjustable gear in? for if you change the cam base circle?
do the 5K lifters have pump up issues at higher rpm/cam lift

[GJM85]

Not entirely sure.... I've been told the 4k gear is better to run as it allows adjustment as the cam and lifters wear over time. Sounds like garbage to me but i've spoken to a lot of people so far and everyone has different opinions so I need to decifer the good and the bad info.
Either way I've confirmed through the guys supplying my gear I should be able to use the 202 red motor lifters with the standard pushrods... So the rebuild kit with ACL pistons, solid lifters and molly rings is on it's way.

[GJM85]

I took the cam in to the recon shop where their doing the rest of my gear. Asked them to get the cam ground for me to this spec: 30-70, 280 degrees, 0.405" valvelift.
They reckon they can do it but i need to use the toyota lifters and new ones at that. I told them I want it ground for a solid and i'm using 202 lifter.........
.........they said they can't do it because the cam will wear to fast.
Are they shitting me or am I just a bit retarded for asking for this?

[oldcorollas]

talk to camtech?

[KENut]

Maybe the lifters have a differnet end on them, ie flat vs dome, and thats why they said use toyota? Just a guess.
But you should be able to do it even though its a large cam, getting a second opinion is a good idea.
I'd recommend Camtech as well

[oldcorollas]

perhaps the lifter bores are offset differently between the solid and hydraulics? that is something i have not checked.

can you measure the centre-centre spacing of the hydraulic lifter bores?

then again, the cam lobes may also have different spacing.

if you are asking for 5K cam, then all the grinds will be for hydraulic lifters, so you ned to talk to a cam shop that knows a bit more

camtech wanted to reface my lifters (ages ago) and they were refaced flat for a 4K cam, but the hardfcing flaked off soon after and i refaced another set i had to be flat also...
5K may be different tho. all depends on the cam/lifter offset