343,000km on my 2.8D hilux - too many k's for a turbo?

[islandvitara]

im wanting to turbo my Hilux 2.8 diesel, though it has 343,000km's on the engine but in sayin that its doin great!! blowin zero smoke from what i can see and have had no dramas with it at all...is the amount of k's the engines done going to be harmful if i am to turbo intercool it? ive read a fair few threads on turboing the 2.8 but havnt really read anything about how many k's is too many... plannin on running around 8 - 10psi..

my hilux already as extractors + 2.5" straight through exhaust with a muffler..


thoughts?

[tweak'e]

compression test it first. if its low forget it as you will just get tons of blow by.

[islandvitara]

is it possible to do a compression test at home with thr right tool(s)? if so what will i need and what should the compression be/read?

theoraticlly, if the compression is normal as per factory setting ect the engine will be fine to turbo?

or if say the compression is down slightly - what would i need to do to fix this to be able to turbo it?

[DUDELUX]

I have a 2.4d, I want to turbo it too.
Mines got a very similar amount of kms on it, so Im going to be safe and rebuild the engine first.

[oldmate]

Compression test is a good start. Low compression is probably worn rings. It's not hard or expensive to replace these, so long as the ring grooves on the pistons, and the bores are OK.

Unless you are sure it has never overheated in it's life it's worth it to pull off the head and check for cracks around the vavles and combustion chambers. If you have a cracked head, a turbo setup won't last long.

The biggest mistake people make when turboing is going overboard. Stick to 7-8psi and you'll be at the best compromise for reliability and performance.

Do all the above and you still aren't happy with performance then you need to look at engine conversions. But on the plus side you will have a verified L motor in very good condition that will be worth good money.

[islandvitara]

thanks oldmate, i will look into it this is a link to a thread talking about the compression test on a 2.8 http://forums.overlander.com.au/viewtop ... 5d1fcd726b" onclick="window.open(this.href);return false; the bloke had a reading of 380psi across all cylinders, and factory specs show it should be between 284psi - 455psi....

im the 3rd owner of the lux and it hasnt oveheated ever for me or the previous owner....suppose i should still check it all i guess...in saying that should i also just purchase a 2.8 rebuild kit while im at it and go from there or is that a whole new ball park?

[oldmate]

You don't want to buy a rebuild kit before pulling the engine apart, largely because you don't know if you'll need it, and if you do what size pistons/bearings you may need.

If it were me in this situation i'd first

compression check it. If that's good i'd pull the head and check for cracks and wear on the head and bores.

Then if that's ok i'd chuck in some rings and big end bearings anyway, because it's not much more work at that point (and cheap insurance so to speak)

then throw on the turbo

All that costs minus the turbo is a few hundred for rings and bearings and gaskets and bits.

A good weekend in labor though, but not difficult/intricate work.

Then I would have a turbo 3L that I know is in good order.


But my advice to you is to compression check it. then you can come back and tell us the figures. But if they are in the upper range of the spec, and within 10 percent or so of each other then you probably have a pretty good engine to begin with.

[islandvitara]

oldmate you are a champion!! i truely value your advice mate thank you heaps!!! i'll bring this topic back up once ive done a compression test and get back to you's with the figures..

thanks oldmate, cheers

[tweak'e]

I have a 2.4d, I want to turbo it too.
Mines got a very similar amount of kms on it, so Im going to be safe and rebuild the engine first.

i can't remember if the 2.4 atmo engines are all that good to turbo. personally i wouldn't bother, fit a 2.8 or 3 litre in there instead.

[Red868]

heres my advice , if it didnt come out of the factory turbo'd dont touch it
2.8's do big ends in stock form let alone turbo'd form
id save my money and leave it alone.

[oldmate]

I have a 2.4d, I want to turbo it too.
Mines got a very similar amount of kms on it, so Im going to be safe and rebuild the engine first.

i can't remember if the 2.4 atmo engines are all that good to turbo. personally i wouldn't bother, fit a 2.8 or 3 litre in there instead.

Toyota thought they were good enough to make a 2l-t.

Most horror stories come from too much boost, or started with a poor condition engine.

[gavanchua]

Anyone knows how where and roughly how much would it cost to do a top overhaul and install a BOT kit? Around Brisbane area would be preffered...

[tweak'e]

.........
2.8's do big ends in stock form let alone turbo'd form
...........

the cause is running crap oil or lack of oil changes. get a lot of jap imports that have never had an oil change outside of warranty that blow big ends or snap cranks.

I have a 2.4d, I want to turbo it too.
Mines got a very similar amount of kms on it, so Im going to be safe and rebuild the engine first.

i can't remember if the 2.4 atmo engines are all that good to turbo. personally i wouldn't bother, fit a 2.8 or 3 litre in there instead.

Toyota thought they were good enough to make a 2l-t.
........

if i remember rightly the 2.4 atmo is a bit different. i think no piston oil squirters etc.

[monster fj]

i have a turbo 2.8 DIESEL 350000 KS ON IT PUT THE SURF TURBO MANIFOLD TURBO OIL COLLER ECT AND IT RUNS FINE IT BLEW A BIT OF SMOKE AT THE START BUT I WOUND THE FUEL SCREW UP TO MUCH BUT OTHER WISE IT RUNS FINE 7 PSI CAN GO TO 10 BUT I WOULDNT RUN IT

[a1 mech]

heres my advice , if it didnt come out of the factory turbo'd dont touch it
2.8's do big ends in stock form let alone turbo'd form
id save my money and leave it alone.

what motor doesnt do bigends if it isnt maintained? It all comes down to maintenance which alot of people dont do then whinge that they hav a crap motor On the other hand people that do get well over 500k unopened on a regular basis.

Thousands of 3L and 5L's run aftermarket turbo's of various performance. Only a tiny fraction of people have issues and it is usually due to poor engine maintenance, incorrect EGT's or poor cooling system.

Early 2L's & 2LT are rocker arm, later 2L-II's lift via tappet as does the turbo version. The 2LT and 2LT-II turbo models are identical to the NA motors other then a compression ratio difference which is a variation in head gasket.

3L and 5L are also identical other then compression ratio, bore/stroke.

If there is nothing wrong the motor currently I wouldn't even open it, as others hav stated check the compression and if it is with in spec bolt the turbo gear on, make sure the cooling system is perfect, Set the boost then use a pyrometer to get the fueling correct.

[thehanko]

Mine has 350k on it when i sold it and it was going great. if you keep the boost in check i would be happy to just throw it on. Do a compression check to be sure if you would rather.

I sure as heck wouldn't pull it down if there was no indication it needed it.

The 3 L loves a turbo and it will be the best thing you can do to your truck.

[gavanchua]

Sorry to hijack your thread here... but my 3L has a lil knocking sound coming out of it... it still drives normal and still get's up to speed but the knocking sound can get annoying. It's constant with the revs. Any ideas what's that sound is? If the sound is negliable i'd like to find someone who can bolt on a turbo kit for me. Anyone knows how much it would cost to get the turbo kit fitted? but if the sound needs rectification, who can i go to fix the knocking sound?

thanks in advance...
Cheers.

Gavan

[a1 mech]

A knocking that speeds up and down with the revs could be a few things. Whats the mileage on the motor and how often have you changed the oil?

It could be a tappet sound which is normally caused by lack of or poor oil. Maybe change with some decent 20w60 to see if it goes away.

Worst case is it will be a bottom end knock which will be a worn crankshaft bearing, this means your engine needs a partial or full rebuild before thinking about a turbo.

[Red868]

A knocking that speeds up and down with the revs could be a few things. Whats the mileage on the motor and how often have you changed the oil?

It could be a tappet sound which is normally caused by lack of or poor oil. Maybe change with some decent 20w60 to see if it goes away.

Worst case is it will be a bottom end knock which will be a worn crankshaft bearing, this means your engine needs a partial or full rebuild before thinking about a turbo.

i rest my case

[a1 mech]

If u dont have faith in them dont own one, simple. No motor lasts forever especially if they are treated like crap.

[ae86levin]

If you're thinking of doing the turbo install take a look at this thread I made after doing mine. I was in the same position as you a year ago and after heaps of research I decide to give it a crack.
http://www.outerlimits4x4.com/viewtopic ... bo+install" onclick="window.open(this.href);return false;

[gavanchua]

A knocking that speeds up and down with the revs could be a few things. Whats the mileage on the motor and how often have you changed the oil?

It could be a tappet sound which is normally caused by lack of or poor oil. Maybe change with some decent 20w60 to see if it goes away.

Worst case is it will be a bottom end knock which will be a worn crankshaft bearing, this means your engine needs a partial or full rebuild before thinking about a turbo.

milage on the ODO says high 2xx,xxx... currently using 10w40 semi synthetic oil since i got the car. Might go a thicker one on the next oil change. I have no idea how the engine was treated before this as i got the car second hand. It does actually sounds like a tappet noise but i'm hoping it's just that. Haven't seen inside the engine yet as it doesn't burn engine oil but as i've mentioned the knocking sound is annoying. Any idea how much a partial rebuild might cost and who can i send the car to? I would love to do it myself but i don't have the tools for it(torque wrench which is the most essential and the time as well) so i was thinking of sourcing out a mech which can rectify the knocking and install the turbo kit at the same time(hehe, actually i can't wait to get the turbo installed ). any info is greatly appreciated. Thanks heaps!

Gavan

[a1 mech]

Id try a thicker oil 10W is a bit thin for an older diesel IMO. Any decent mechanic should be able to diagnose where and what the noise is, tappets might need a shim or 2. Could also be a pulley bearing in the front.

[gavanchua]

Id try a thicker oil 10W is a bit thin for an older diesel IMO. Any decent mechanic should be able to diagnose where and what the noise is, tappets might need a shim or 2. Could also be a pulley bearing in the front.

Ah alright, shall get a mech soon to check out what's that sound and hopefully to rectify it once and for all...

Just heard a surf/4runner with a turbo the night before.. gosh it sounded awesome... Hehehe...

yeah i guessed so too cause my D22 navara ran 20w50 oil previously... was using the 10W40 cause i had a bottle of it in the garage. Had a quick look at supercheap today to get replacement bulbs and also found a bottle of valve/tappet oil additive thing which supposed to remove or at least make the "tick tick tick" sound less, don't know how much that would work tho. Am currently thinking of putting in an oil thickener/engine treatment/stop smoke additive to the current oil since it's too thin.

Anyways, has islandvitara made a decision to turbo the 3L yet?