1HDT Rebuild

Post by **guerd87** » Thu Jun 01, 2006 4:43 pm

G'day guys, how are we going?

A few months ago my recently bought 80 series threw a big end bearing and has damaged a fair bit of the motor

after pulling it down it has to come to the following:

New crank
block bored out 20thou
new pistons and rings
same rods, 1 of them reshaped
head reco'd
pump and injectors overhauled

all up ivespent just a little over $3k which is not that badof a price

im just after a few general tips when running the turbo diesel in? highway miles or around town? do's and dont's

any info anyone has would be helpfull

cheers
john

Post by **dogbreath_48** » Thu Jun 01, 2006 4:57 pm

Don't rev it's tits off, but at the same time don't let it lug around everywhere. Gentle counrty miles with varying speed/rpm is probably best, with a little load.

-Stu

Post by **vSAHARAx** » Thu Jun 01, 2006 6:36 pm

when we had to get our 1HDT rebuilt (same reason) the fella at CPE (cooparoo performance and engineering) Told us to

1: DONT OVER REV IT!!!!
2: DONT make it lug around
3: Just drive it normally

But he did say the best thing we could do would be go home and get our camper trailer and take it for a run up Toowoomba range and make it work (around 2500RPM) to bed the rings in.

We did that at about 1000kms after the re-build and 150 000k's later its still good as gold, heaps of power and it doesnt burn oil

Post by **rockcrawler31** » Thu Jun 01, 2006 11:15 pm

once you've got it run in, don't be scared to give it some welly occasionally. Drive it like a granny all it's life and it will glaze the bores and get excessive blow by.

Post by **sniper** » Fri Jun 02, 2006 3:23 pm

I agree drive it normally around town, without hitting the red, and make it labour every now and again. And after 1000ks i would change the oil again.

Post by **quick60** » Fri Jun 02, 2006 5:44 pm

I want to know how you did all that work for a little over 3K ?
Just a pump and injectors should cost that much.

Post by **guerd87** » Fri Jun 02, 2006 6:18 pm

thanks for the replys guys, will remember those facts when i run her in

as for doing it so cheap, i lied in firstpost actually, injectors wernt done as thye were fine

rices as follow:

crank: $750
block bored and hoaned, rebuild kit with oversized pistons and the usuall shit done: $1200 or so
head's recod from a mate in the game: $420
pump done up: $920 northcoast diesel

then just your general shit,new belts, oil filters etc would make the $3k

Post by **Shadow** » Sun Jun 04, 2006 11:58 am

$3k is a steal of a price. id be very happy if i was you. Anyone else would have paid about $5k+ i rekon

Post by **scottmcguinness172** » Sun Jun 04, 2006 1:17 pm

hurry up and get ur car on the road john

slack ass

Post by **Joombi** » Sun Jun 04, 2006 3:05 pm

where in the world did you get a crank for $750?????
i couldn't get a crank for a 1HZ for under $1500 up here rip off bastards
just a bit of info for anyone interested, toyota are selling Brand New 1HDT's for $7500 & 1HZ's for about $6500 (Less pump, starter ect)

Post by **Hardcorr** » Sun Jun 04, 2006 5:58 pm

Is the pump and starter etc, the same on the 1HDT to the 1HZ. I've buggered the 1HZ for the third time in my 80 and am looking at another engine, but unless I can get another toyota motor for a reasonable price, I'm going the 6.5 V8 Diseasel.

Cheers
Corry

Post by **Shadow** » Sun Jun 04, 2006 7:38 pm

Hardcorr wrote:Is the pump and starter etc, the same on the 1HDT to the 1HZ. I've buggered the 1HZ for the third time in my 80 and am looking at another engine, but unless I can get another toyota motor for a reasonable price, I'm going the 6.5 V8 Diseasel.

Cheers
Corry

1hdft will be cheaper than a chev and alot easier to put in, and probably alot better engine.

Post by **Hardcorr** » Sun Jun 04, 2006 8:07 pm

Most 1HDFT's are for exchange only, and are still around the 10-11K mark from the wreckers.
I've heard of them cheaper, but that's after they have been sold, mostly via mates rates. I'm still shopping around and keeping options open, and I'm in no hurry. With 2 Shorty 40's, a 60 and an 80, I'm not stuck for something to drive, and the missus has her Barina.
I've found V8 diesels for 7k, and the complete conversion will be able to be done for around 12k, by myself. Full reco'd motor is 10.5k and a new crate motor is 14k.
Drive in drive out is around 18k, but I want to do it myself as there are other things that I want to do at the same time, radiators, clutch etc.

Cheers
Corry

Post by **guerd87** » Mon Jun 05, 2006 7:52 am

1hz's and 1hdt's are exactly the same motor

pump:
1hdt: 12mm plungers
1hz: 11mm plungers

injectors:
1hdt: dual springs
1hz: single

pistons have different swirl champers

i do beleive the cam is different, but saying these last 2 they come with a newmotor

everythingelse is exactly the same,1hdt has decompression plates builtintothe head gasket kit but runs same head

every other bolt on part are the same

if anyone would wish to add/correct me please do,im no expert thats just waht i have found undermy own research, thinkijg of putting a 1hz into my cruiser instead of the 1hdt

Post by **Shadow** » Mon Jun 05, 2006 1:08 pm

guerd87 wrote:1hz's and 1hdt's are exactly the same motor

pump:
1hdt: 12mm plungers
1hz: 11mm plungers

injectors:
1hdt: dual springs
1hz: single

pistons have different swirl champers

i do beleive the cam is different, but saying these last 2 they come with a newmotor

everythingelse is exactly the same,1hdt has decompression plates builtintothe head gasket kit but runs same head

every other bolt on part are the same

if anyone would wish to add/correct me please do,im no expert thats just waht i have found undermy own research, thinkijg of putting a 1hz into my cruiser instead of the 1hdt

1hz is an indirect injection engine with precombustion chambers (swirl chambers as you call them?)

1hdt(1hdft 1hdfet) is a direct injection engine and has no precombustion chambers

therefore the injectors and head are completely different.

Post by **sniper** » Mon Jun 05, 2006 3:56 pm

very curious as to why you would want to change from a 1HDT to a 1HZ for anyways

Post by **Shadow** » Mon Jun 05, 2006 5:04 pm

sniper wrote:very curious as to why you would want to change from a 1HDT to a 1HZ for anyways

who wants to>?

Post by **sniper** » Mon Jun 05, 2006 7:16 pm

guerd87 wrote: thinkijg of putting a 1hz into my cruiser instead of the 1hdt

am i wrong

if so my bad

Post by **guerd87** » Mon Jun 05, 2006 7:32 pm

well i was wrong about that one

i wasnt aware 1hz's have precombustion chambers

the swirl chambers are on the pistons, in the workshop manual they are refferred to as these, i dont know how they work or what they do, but theyre different

was going to goto a 1hz over 1hdt and turbo it

my first quotes for rebuilds were huge,was not worth the money to replace the 1hdt

after finding out that it can be done alot cheaper i stayed with 1hdt

Post by **sniper** » Mon Jun 05, 2006 7:42 pm

champion

i love not having to wait 3-4 secs to start my car, go the direct injection

Post by **Shadow** » Mon Jun 05, 2006 10:24 pm

guerd87 wrote:well i was wrong about that one i wasnt aware 1hz's have precombustion chambers

the swirl chambers are on the pistons, in the workshop manual they are refferred to as these, i dont know how they work or what they do, but theyre different

was going to goto a 1hz over 1hdt and turbo it

my first quotes for rebuilds were huge,was not worth the money to replace the 1hdt

after finding out that it can be done alot cheaper i stayed with 1hdt

other than turbo rebuild, maybe a bit extra to rebuild the 1hdt pump, and probably a bit extra in rebuilding the 1hdt the rebuild costs should be identical

pistons will be the same if not maybe $100 dearer, crank will cost the same (crack test etc) and the block is all gonna be the same.

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