Builds 1985 JDM 3B Engine Rebuild and Other Stories (2 Viewers)

[mongoose2231]

Looking Good bud!

 

[OGBeno]

Might as well share some more new OEM pics...

Pistons: These come as a "standard" size with no sizing due to the fact that the cylinder liners do the work of sizing.

These are manufactured by ART Pistons for Toyota.... ART is a very long time supplier for Toyota and has always manufactured Land Cruiser pistons for almost all engine variations.

ART used to be a separate entity until they were recently consolidated under the AISIN Group, which is a part of the Toyota Group.

アート金属工業株式会社

アート金属工業株式会社は、長野県上田市に本社を構える自動車用ピストンの製造・販売を行う会社です。鋳造、鍛造、加工の各工程を自社で完結しており、高品質、高機能なピストンを安定的に供給しています。

www.art-piston.co.jp

 

[OGBeno]

Some more piston porn.

Thrust washers: These are the standard size and go in at the # 3 main bearing (so the center main bearing journal). These are manufactured by Taiho for Toyota (Taiho has long been a Toyota supplier and has always provided main bearings, conrod bearings, camshaft bearings and thrust bearings for the Land Cruiser engines):

TAIHO Company Outline

 

[OGBeno]

Camshaft bearings (standard sizing): Again, manufactured by Taiho:

This is the block drain cock. I went with the later 1GR-FE drain cock mainly due to availability. PN: 90910-09129

A new timing gear oiler:

 

[OGBeno]

New timing gear:

New set of piston skirt oilers:

Piston ring set. There is only one size for these since there is only size corresponding piston size. These are manufactured by the Nippon Piston Ring Co which is a long time Toyota supplier:

Products for automobiles, Products for marine engine and the other products - Product Information - NIPPON PISTON RING CO., LTD.

Published the Product Information / Power Train Related Parts Information of NIPPON PISTON RING CO., LTD.

www.npr.co.jp

 

[mongoose2231]

If I'd known at the time that I was going to turbo my truck after the rebuild, I'd have asked that you get me a set of these steel insert pistons dude! Can those still be had from a source somewhere?
Thinking future, that's all..

 

[mongoose2231]

OH, and one more thing, how come your 3B has the piston oil squirters without it actually being a turbo motor?

 

[cruisermatt]

should be done like, next week?
Is that rear main seal NLA?

 

[OGBeno]

should be done like, next week?
Is that rear main seal NLA?

Hahah. Now waiting for parts from all over the globe.

RMS: 90311-95003 readily available.

 

[cruisermatt]

That broken main bearing cap is insane.

 

[OGBeno]

That broken main bearing cap is insane.

Agreed. Everyone whom I’ve talked with or shared the picture is amazed at both the cap breaking and the fact that I might have been driving this thing for tens of thousands of miles without even knowing.

Really speaks highly to the robust engine design.

 

[Pacer]

Agreed. Everyone whom I’ve talked with or shared the picture is amazed at both the cap breaking and the fact that I might have been driving this thing for tens of thousands of miles without even knowing.

Really speaks highly to the robust engine design.

Can we see a pic of the fracture surface please?

 

[cruisermatt]

4 out of 5 is 80%.. which last time I checked is a passing grade! Just leave it out on reassembly, you clearly don't need it

 

[OGBeno]

On the advice of smarter minds than me, I’ve decided the correct path is to have a machine shop line bore the block with the used #2 bearing cap.

 

[OGBeno]

Here you go @Pacer

And the bearings: Inside:

 

[Pacer]

On the advice of smarter minds than me, I’ve decided the correct path is to have a machine shop line bore the block with the used #2 bearing cap.

Good call.
Maybe look for (mag flux) other stress in the block, especially around boss #2

 

[Prairie Swamp]

The inside corner on the bottom of the cap is a stress riser - but still that's a beefy cap on a 5 main 4 cylinder. Must have happened when you tipped it on it's side

Looking at the witness marks on the exterior of the lower shell - it was working against the larger piece of the cap and tho it was flexing it held. Amazing.

 

[OGBeno]

The inside corner on the bottom of the cap is a stress riser - but still that's a beefy cap on a 5 main 4 cylinder. Must have happened when you tipped it on it's side

Looking at the witness marks on the exterior of the lower shell - it was working against the larger piece of the cap and tho it was flexing it held. Amazing.

Agreed. Probably occurred during the flop when the engine ran for about another 30-40 seconds.

Just sent some pics of the bearing cap and the main bearing to the machine shop that is going to be doing the line boring and he was amazed how robust things were for the 3B.

 

[OGBeno]

Plan has been set.

1. Interviewed machine shop and they have line boring equipment, work on diesel engines, and have an older guy who has done machine work to Toyota diesels from his time in industrial applications.

2. Machine shop will line bore main caps, do a run out test of crankshaft, and go from there regarding best course of action.

3. Machine shop will press out old cam bearings and install new ones.

4. Machine shop will remove old oil jet and install new ones.

5. Machine shop will press out and install new cylinder liners (if needed-- they have cleaned up pretty impressively with just my home brew flex hone from Amazon.)

Then, I'll clean up, paint, and built out the rest of the engine.

Replacement bearing cap should be here early next week, so parts will go to machine shop next week with a 8-10 day turn around. Gives me plenty of time to clean ancillary parts, prepare garage for block, finish up the head, etc.

 

[FJBen]

Plan has been set.

1. Interviewed machine shop and they have line boring equipment, work on diesel engines, and have an older guy who has done machine work to Toyota diesels from his time in industrial applications.

2. Machine shop will line bore main caps, do a run out test of crankshaft, and go from there regarding best course of action.

3. Machine shop will press out old cam bearings and install new ones.

4. Machine shop will remove old oil jet and install new ones.

5. Machine shop will press out and install new cylinder liners (if needed-- they have cleaned up pretty impressively with just my home brew flex hone from Amazon.)

Then, I'll clean up, paint, and built out the rest of the engine.

Replacement bearing cap should be here early next week, so parts will go to machine shop next week with a 8-10 day turn around. Gives me plenty of time to clean ancillary parts, prepare garage for block, finish up the head, etc.

sounds like a good shop. I would make sure and give them the liner protrusion specs so they can check those and see ifnthey need to counterbore or not