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 Post subject: '87 turbo diesel 4Runner
PostPosted: Sat Jan 30, 2016 11:23 am 
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So in the fall I swooped in and scooped this up from one of our customers. She was moving out of town so I scored it for $1000! It's only spent a little time in VT and originally from the west coast. It ran but head was cracked. Not sure if I was going to stay with the diesel at first. Now I've decided to fix the 2lte and give it a try.

When I got it home...

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PostPosted: Sat Jan 30, 2016 11:24 am 
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PostPosted: Sat Jan 30, 2016 11:24 am 
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Then I drove it in the shop to inspect the head.

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Well there's your problem. Each cylinder looked like this.

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PostPosted: Sat Jan 30, 2016 11:25 am 
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My new bare 3l head came this week. I've stripped the old head and will check and see what can be reused.

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PostPosted: Sun Jan 31, 2016 10:37 am 
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I'm not too diesel savvy...

Are those valves with the holes in them? Are they just pockets are actual holes (not the best choice of word... ports?). Is that where the fuel injection occurs?

Cracking.... caused by heat or the diesel version of pre-detonation?

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PostPosted: Mon Feb 01, 2016 8:43 pm 
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I'm new to diesel as well... I'm told those are some sort of per chamber. The fuel is injected into those. Also the glow plugs live in there. It's out dated tech. I have some learning to do.

The rest of the valve train is just like any solid lifter VW head.


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PostPosted: Fri Feb 12, 2016 8:52 am 
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cool project, and that runner is clean!

the cracks between the valves aren't really that scary, believe it or not. Very common in idi vw diesel land...every head I've ever pulled, even in great running condition, had those little cracks yet the valves all sealed.

The prechamber cracks worry me more. Good thing you got another head. The prechambers sometimes crack apart and then obviously, boom.

I haven't actually worked on any of those toyota diesels, but all the idi diesel stuff is similar. When it's all back together I'd install a boost gauge and egt, then you can play with fuel some and liven it up. It's the high egts that cause problems. If you're rolling coal all the time, egts are probably really high

looking forward to progress on this one


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PostPosted: Tue Feb 23, 2016 8:08 am 
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From what I've read those cracks between the valve ar whee the issue lies. There's a coolant passage there and not much material between it and the hot combustion area. When people allow the engine to over and water starts boiling off... It's one of the weakest points. This engine was pumping coolant just cranking.

Got some done this weekend. I put the new head together with my old parts. Everything was in spec and the valves look ok after I lapped them. Plan to do the cam bearings at some point.

Found a new head gasket and bolt on ebay from the UK. I started measuring my piston protrusion and just went with the thickest gasket. That is what I pulled out of the engine. I also plan to add an intercooler and much boost. With the compression being around 22:1 I wasn't worried about it being a little thick.

Anyway the engine is mostly back together. Can't start it because no one stocks an oil filter... Ordered a toyota one the should be here tomorrow.


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PostPosted: Tue Feb 23, 2016 8:12 am 
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PostPosted: Tue Feb 23, 2016 8:15 am 
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Next project is a downpipe and finish removing the egr crap.

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PostPosted: Sun Feb 28, 2016 9:37 pm 
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Made a 2.5" downpipe today to replace the wimpy factory one. Also removed the AC crap. Truck is running again. Need to sort out the vacuum lines next and start on the intercooler. Saving for a IFS iliminator kit to swap the front axle from the old truck.

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