Ca18det Oil Press - crank and main bearings

[walkes]

Hi There,

I am new here, and coming from far far a way, but getting to the point, here we have a big problem w ca18det bearings and related to that crank problem, almost every ca18det was changed to SR20det because of that.

I am preparing mine CA1det for drifting and recently disassemble engine and what I so was curious... all 4 rod bearing are in mint condition, but second and fourth main bearing are touched, I don't know if because of this second I can still hold STD size.

I am using Motul V300 competition 10-50 one of the best and I don't know if ca18det suffer from low oil pressure or there are some modification (like in RB) that should be done to avoid bearing problems.

I've already ordered new oil pump, all acl bearing etc.

Any help would be very appreciated.

[themadscientist]

CAs don't have oil pressure problems. I'm no oil guru but your oil does not seem ideal. That is a lot of viscosity span you are asking of the polymers. I have used Motul in my bikes and it's good stuff but you might try something with a more targeted viscosity relavent to your climate, a 10-40 or a 20-50.

I run 15-50 Mobil1 in all my cars including my CA18 in a very hot climate and have never hurt a main bearing. I have wiped a rod bearing but I was doing 8500 rpm speedshifts every saturday night.

Wear on the second and fourth bearings sounds like an unbalanced crank, get a dynamic balance on it as part of the rebuild and DO NOT lose the balancer to go underdrive pulley. These are half counterweighted externally balanced cranks. They would like that as much as a girl likes to hear you scream another girl's name in the sack.

Want to talk oil problems, the SR20 uses spray bars to oil the valvetrain, that's straight out of the 60s. Even L28s dropped that late in their evolution.

[boost_boy]

Hi There,

I am new here, and coming from far far a way, but getting to the point, here we have a big problem w ca18det bearings and related to that crank problem, almost every ca18det was changed to SR20det because of that.

I am preparing mine CA1det for drifting and recently disassemble engine and what I so was curious... all 4 rod bearing are in mint condition, but second and fourth main bearing are touched, I don't know if because of this second I can still hold STD size.

I am using Motul V300 competition 10-50 one of the best and I don't know if ca18det suffer from low oil pressure or there are some modification (like in RB) that should be done to avoid bearing problems.

I've already ordered new oil pump, all acl bearing etc.

Any help would be very appreciated.

Show some pictures of the crank journals and I'll give you some idea as to what your options are.

Dee

[themadscientist]

Yeah, show us your crank!

er, wait a minute, that came out wrong, stop!

[boost_boy]

Yeah, show us your crank!

er, wait a minute, that came out wrong, stop!

I understand it's Friday and all, I don't want to see his crank that only has two journals .

Dee

[ca18detgabby]

always love reading the post in here.

PS just curious far away is IL? how many CAs have you seen swapped to SRs? are you overseas somewhere?

[ard]

Gabby, learn geography Take a look at his profile - Warsaw IL Poland, Europe i suggest you balance your crank with flywheel and clutch (better get some lightweight sr20 flywheel with ceramic or organic clutch & pressure plate)and i hope you ordered acl race series bearings because they are trimetal (at least rod bearings, mains can be oem (non trimetal), because they don't get that much of pressure).

imho new oil pump, balanced & polished crank, trimetal bearings is the only way for high-hp CA's

[walkes]

I am from Europe and actually there is no running Ca18det all because of the bearings.

Fourth

Second

[articzap]

There a bit worn but theres no bronze showing. Looks like they good some miles left on them, but if its that far apart already, get it all replaced.

[walkes]

That are worst ones, others looks new.

Of course all would be new, all fitted with ARP studs, new set of seals.

I will build it with CA18DE intake cam, ITB and stuff,

I have already done suspension and ceramic clutch, and replace ABS with tilton balancer.

I am thinking about preparing crank like this:




Modified by walkes at 2:52 PM 7/26/2008

[float_6969]

...and replace ABS with tilton balancer.Modified by walkes at 2:52 PM 7/26/2008

What does this statement mean?

And where do you have access to a fully counterweighted crankshaft for the CA? Are you planning on getting the stroker from ND?

[themadscientist]

That's an SR crank. He was saying he wanted the knife edging and was using that crank as an example. The CA18's half couterweighted crank would probably respond very unfavorably to lightening. It's already vibration prone, hacking off counterweighting would probably make it worse.

[walkes]

What does this statement mean?

And where do you have access to a fully counterweighted crankshaft for the CA? Are you planning on getting the stroker from ND?

It means there is no ABS at all, rear got Tilton 90-1003 PROPORTIONING VALVE, LEVER TYPE.

[walkes]

That's an SR crank. He was saying he wanted the knife edging and was using that crank as an example. The CA18's half couterweighted crank would probably respond very unfavorably to lightening. It's already vibration prone, hacking off counterweighting would probably make it worse.

May I ask you to tell more about half counterweighted crank what exactly does it mean and what to with such cranks ?

[themadscientist]

May I ask you to tell more about half counterweighted crank what exactly does it mean and what to with such cranks ?

The crank at the top is fully counterweighted, the one on the bottom is not. The extra counterweights allow the crank to be balanced to a closer spec and can increase high RPM stability. The SR is full, the CA is half.

[walkes]

The crank at the top is fully counterweighted, the one on the bottom is not. The extra counterweights allow the crank to be balanced to a closer spec and can increase high RPM stability. The SR is full, the CA is half.

Thanks that's clear, so weight of the crank is 13 kg, flywheel 12 kg, local crank balancing guru advice me to nitrogen the crank. How much can I take from fly wheel like 6 kg ?

[Torpor]

Im currently Running a Knife edged, Tear dropped crank. I havnt had any issues what so ever, the motor has become super smooth and allot more responsive.

The most that was able to be removed reliability from my stock flywheel was 2 KG

[walkes]

Is any of you using oil restrictors? Since RB motors are made base on CA engines, me they also have problem with oil trap in the head ?

[r34 gtr]

Not many, if any at all, of us are running oil restrictors in the head. Some people have complained about oil drainage problems, but if your engine is in good shape it shouldn't really be an issue. I wouldn't worry about it unless you are running a high volume dry sump setup or something.

Speaking of which, if you are going to be hammering on your car, and are worried about your bottom end, you should look into an Accusump setup.

[HighwayStar22]

http://www.accusump.com/

[walkes]

http://www.accusump.com/

Yes, yes, I've already bought one.

Ok new pictures of lightened OEM flywheel 3 kg shaved off

[walkes]

Hello,

Small update, as you can see crank is prepared:

[DALAZ_68]

so much info...my head be spinning jiggah...it be spinning....

the one thing my mech who installed my CA was telling me about the rod bearings and how they give out...

god i cvant wait till my monies are in order ot start my build