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TD42 Rebuild time

Tech Talk for Nissan owners.

Moderators: toaddog, V8Patrol

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Posts: 287
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TD42 Rebuild time

Post by michael a »

My big ends got really rattly last night so I pulled off the sump to find that they are a bit worn.

The truck has over 500k on it.

Should I

new bearing back together

or

Rebuilt it.

Does any one know what a bottom end rebuild it worth Pistons ect.

Cheers
get under it
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do it

Post by xenith »

im doing mine fitting new liners droped forged pistons & asemble myself. balanceing ,grinding&meachineing by workshop should b good for 30pis :twisted: $3500 :armsup:
it will go or it will blow
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Post by Sterlo »

d'day michael

Well mate at that milage i'd be rebuilding the old girl. I have no idea of the cost to rebuild but if you were to do it urself u'd save a lot. Then theres the head to consider,, U might pull it off only to find it is cracked or somthing.. Then Y did the big ends get noisey????? Thats the big question.. How muchwhite metal was gone from the shells, was it down to the metal??

Cheers sterlo
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Re: do it

Post by GQ TROL »

xenith wrote:im doing mine fitting new liners droped forged pistons & asemble myself. balanceing ,grinding&meachineing by workshop should b good for 30pis :twisted: $3500 :armsup:
What pistons are you using??
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Post by xenith »

What pistons are you using?
mate is an engine rebulider he is getting them for me dont know brand sorry :oops:
it will go or it will blow
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Post by michael a »

just started to get noisey the reason that the bigends would have gone is prob 500k and a turbo running 12psi on for 300k.

is that just parts for 3500 are you putting bottom end in?
get under it
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Post by GQ TROL »

xenith wrote:
What pistons are you using?
mate is an engine rebulider he is getting them for me dont know brand sorry :oops:
Any chance you could find out from him for us? Would be good to know for the next time we have to rebuild.
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Post by xenith »

doing all assambley work my self inc pulling old liners out and putting new ones in :cool:
it will go or it will blow
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Location: Melbourne

Post by Woop »

The most difficult parts of rebuilding a TD42 are removing the cylinder liners and installing new cam bearings. I had a tool made up to remove the liners when i did the rebuild--new liners tapped in fairly easily. Nissan have a special tool to install the cam bearings which ensures that the oil holes are lined up with the feed ports in the block properly.I had the shop replace the cam bearings for me, but i did all the rest. Other than that, its pretty straight forward although $$$ even if you do it yourself. To set the Injection pump timing properly, you'll need to get a timing gauge--the engine is very heavy--make sure your crane/lifting tackle is up to it. Have a few pics of the rebuild if you need them. I rebuilt mine at 550,000.

Nick
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Post by muddymav »

you can always run a few welds up the liner. this tends to shrink them. it has worked on many an engine i have rebuilt.just remember to earth the welder to the liner, you dont wanna damage the seat and have to cut and shim it.
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Post by michael a »

I got the motor out tonight.

Got a quote of 3,500 to rebuilt bottom end. ssemed ok new pistons ect.

I spoke to them about to converting it to the turbo pistons but needs new rods and other bits to so seemed like a waste of time.

What pistons should I get for the rebuild?

Cheers
get under it
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Post by Woop »

I used standard size Nissan Pistons. I think they were $60 each.

Nick
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Post by 92mav »

why do people fit new liners to td42 can't they be overbored at all

Brad
GQ TD42, 4" lift, 2" bodylift, 4.6 s, detroit lockers, 35,s t3/t4 plus a turbo,
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Post by bogged »

Woop wrote:I used standard size Nissan Pistons. I think they were $60 each.

Nick
yea, after only getting 550,000 out of them, Im shocked why you went with them again!
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Post by its aford not a nissan »

are the pre 93 pistons still available cause these are suposably heavier thicker and can take alot more abuse than later model ones
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Post by Woop »

92mav wrote:why do people fit new liners to td42 can't they be overbored at all

Brad
The liners themselves are very thin--too thin to be rebored i think.... They could probably be honed if req..

Nick
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