Engine Knocking PT2

[RomanV]

There's no way you could hydrolock it with just the injector firing while the engine is running.

Requires a leaking injector over night or something, or water getting in, or something like that.

A whole lot of air/fuel and possibly timing too far advanced, that'll do it.

[Leiden]

Ok guys need your help again...

I'm trying to work out what 3sgte rods I need, or what 'mark numbers' to get.

3 of the rods have '02U' on the side while another one has '02M', all from the same motor. Does this 'U' happen to mean undersized? Should I even be worrying about these codes?

On the bottom of the Big End Bearing Cap theres a single digit number, is that the mark number?

How do I know which bearings are which, on the ToyoDIY Toyota EPC there is 3 different 'Marks' of bearings listed, I was looking for a mark number on the bearings but the only code I could find on them was 'D9B' whatever that means?

Appreciate the help

- - -

Well it happened after the motor was running for about 30 minutes, so that rules out a leaking injector...

[fivebob]

Well it happened after the motor was running for about 30 minutes, so that rules out a leaking injector...

Leaking injector won't cause an engine to hydrolock anyway. Hell, you could have an injector that's fully open and still no hydrolock because there's no fuel flowing unless the pump is on

[fivebob]

I'm trying to work out what 3sgte rods I need, or what 'mark numbers' to get.

There's no such thing as a 3S-GTE rod, all 3S-G# rods of the same vintage are the same regardless of whether it is turbocharged or not.

[Leiden]

Ok,

So when getting some ST185 Rods what do I need to know? Can I just get any old good condition ST185 rods and whack them in? Whats with the Mark numbers

How do I know which bearings I need to get? Toyota EPC lists 3 different Mark numbers for Bearings, do I need to measure crank journal or do I go by the number on the bottom of the Bearing Cap?

[fivebob]

So when getting some ST185 Rods what do I need to know? Can I just get any old good condition ST185 rods and whack them in?

Why ST185 rods?

Whats with the Mark numbers

You add the numbers on the conrod and the crankshaft together and that gives you the "Mark" # for the bearing. Though whether or not that applies when you using a rod from a different engine I'm not sure.

[Leiden]

Using ST185 rods because I cant find any ST205 rods and they are stronger than factory rods, dont want to bend another one

I think with ACL bearings one size fits all, so I'm guessing I wouldn't have to worry about getting the right bearing Mark #'s?

[fivebob]

Using ST185 rods because I cant find any ST205 rods and they are stronger than factory rods, dont want to bend another one

ST185 rods were superceeded to the ST205 rod, don't know why. Any SW20 rod should be the same, actually any non beams 3S-G# will be the same except the ST215.

I think with ACL bearings one size fits all, so I'm guessing I wouldn't have to worry about getting the right bearing Mark #'s?

No, but you will still have to worry about bearing clearances. Do you know how to use plastigauge and a scraper?

[Leiden]

Don't really know how to use the plasti gauge

I just saw that the same part number for ACL bearings was used for all 3S-G motors from 1989 to 2006 on their parts search, they have min & max clearances, if my bearings were fine shouldn't they then be bolt in?

As far as I know ACL bearings don't come in Mark #'s like the Toyota bearings, probably not as tight a fit as the Toyota ones though, but they should work?

I don't want to use my old ones, I used my fingernail to check for groves etc on the old bearings and it actually took a bit of the surface off the bearing they seem pretty soft,

I don't know what the factory bearings were because the crank doesn't have any markings on it, looks to have been machined at some stage, has a lot of random writing on it with twink pen...

[Leiden]

After looking at the crank it seems like its had some work done to it previously, I dont think the factory would write all over it with a twink pen?

That brings me to the possibility that the crank journals could have been machined, which means undersized bearings...

Would the crank have any markings on it stating it needs undersized bearings from the machinist? For instance,

The factory ST246 Bearings have the markings 'D2IC' on them, whereas my bearings have the markings 'D9B'

Is there anywhere that I could find out what the markings mean?

[Lloyd]

Measure the journals

[Celica RA45]

the twick pen is from the factory for measuring up so motor is a 1 of not been redone

[Leiden]

Ok,

I am getting the factory bearings measured tomorrow to see if the ACL ones will fit,

Just another question, when selecting rods, do they need to match the ones I am replacing?

For instance, the pistons and rods I removed from the motor are marked with a 'C' so I assume they match each other in some way?

When I select the ST185 rods, do I have to get ones marked with a 'C' to match the pistons or does that not matter?

Thanks.