Builds The official Boost build thread (1 Viewer)

[SammyT96LX450]

 

[2fpower]

Thanks Sammy.

My daughter and I started reassembling the engine and the thrust washers seem to be having too much movement. Currently I have .04 inches of movement using the old thrust washers. from the FSM I should have less than .01. My used thrust washers are .0975 inches or 2.4 mm thick each and I need to decrease the total gap by .03 inches, does anyone know how thick the stock thrust washers are?

Ok, so let me check my math. .03 inches that I need to make up. That is about .762mm total.


Now, I have 4.8mm total thickness in the thrust washers, I need to have 5.56 mm total, or 2.78mm each. Sounds like I need the largest oversized thrust washers.

My only concern is that I did not do the test with the caps on, so I may need to do it again.

 

[2fpower]

put all the main caps on and lower thrust bearings, and had a gap of .03 inches, so now I just need to make up .02 inches total. That is .01 inches or .25 mm extra. Sounds like I need the largest ones.

 

[2fpower]

Some action shots of my worker bee.

 

[2fpower]

ok, who besides toyota sells Over Size Thrust Bearings?

 

[half k cruiser]

So when they turned the crank down they also cut into the thrust washer area ? Or is this due to the natural wear on the engine ?

 

[2fpower]

No work done on Crank, so natural wear is my only guess. Total of .5mm of wear over 180k miles. Does not sound too bad to me, but what do I know…..

 

[Robkc]

Still hard to believe you need that much thrust washer with the pistons in that engine looking as good as they did.

 

[half k cruiser]

^ this, I'm also surprised that you need a different size other than std replacement. @2fpower send me the measurements of what you need for thrust washer thickness. I still have the old washers I took out of the 94 this summer, I would be happy to measure them and see if they might work.

 

[2fpower]

need about 2.6 mm thrust washers.

Stock is 2.4mm.

I went ahead and ordered from CDan. Something that they are stocked in Japan and he has never sold them before.

I put it all back together again, and my gauge is still showing that much movement. Gauge seems fine, so I am thinking this is correct.

I will wait for new thrust washers and see how it reads afterwards.

 

[2fpower]

Here are some pics of the paint. [

ATTACH=full]1009071[/ATTACH]

 

[2fpower]

My family got me some things for boost for Xmas.

 

[2fpower]

Was able to get out in the warm weather and clean a little bit.

 

[2fpower]

 

[SammyT96LX450]

When is the engine going in?

 

[95ToyCruiser]

put all the main caps on and lower thrust bearings, and had a gap of .03 inches, so now I just need to make up .02 inches total. That is .01 inches or .25 mm extra. Sounds like I need the largest ones.

When you measured the thrust clearance, did you torque the caps in sequence and then measure your thrust?

I was within specs on mine with ~200k and had the crank polished, didn't even put in new thrust bearings (new ones came with the main bearings, but didn't realize until she was buttoned up).

Thrust bearings aren't doing too much in our motors, if it were a manual, be a different story...

 

[2fpower]

When you measured the thrust clearance, did you torque the caps in sequence and then measure your thrust?

I was within specs on mine with ~200k and had the crank polished, didn't even put in new thrust bearings (new ones came with the main bearings, but didn't realize until she was buttoned up).

Thrust bearings aren't doing too much in our motors, if it were a manual, be a different story...

I believe the true moral level of a human is when they can admit they were wrong.

Get to that in a second..... To answer your question, yes, I followed the FSM and measured it with all caps on and torqued -- not final torque, just what the FSM said.

With that said, tried to install the new bearings and crank with the kids this weekend. It would not fit with the new thrust bearings. measured again with the gauge and it was still .06 inches. Scratched my head a bunch and then got a digital micrometer out and had my son hold it while I moved the crank back and forth. .06mm was the reading.

Looks like my gauge from Harbor Freight is metric and now I have a $60 set of thick thrust bearing washers. Thinking about hot gluing them to the wall making a frown face.

Ordered a set of stock size bearings and hope to get the kids out to the shop this weekend to put it back together.

 

[tornadoalleycruiser]

I have three generations of hf gauges. Newest ones convert now. Still use my starrett when its critical.

 

[half k cruiser]

Hahahahahhahahah I'm not the only one that does this kind of $hit !! Take that @2fpower !!!

 

[2fpower]

Here are the two ways we measure for thrust bearings