Nissan TB4.2E Petrol Tech

[MUDRATGQ]

Hey guys im starting this thread for those of you like me are running the TB4.2E an have had prob's if any an what have you done to solve them.

The only prob's ive found with mine an like most ive heard about is that there very tappetie ive readjusted mine twice in the 2 1/2 years ive owned it seem's to be a common prob an other than adjusting them every now an then due to the noise driving ya crazy it dosen't seem to effect power but the down side to not adjusting them is eventuly they belt the crap out of the top's of the valve's an need replacing.

The other prob ya here a lot about is Carby Probs wich most are caused by either being worn with age or the pump plunger in the top of the carb sucking in air around the bottom an side's wich the way to fix either is to put a kit through the carb or replace the plunger.The other is the choke sticking on wich is usely because the little plastic clip on one of the little conector arm's come's off an get's stuck causing the choke to stick on or a badly addjusted choke or the power cable that run's the choke has fallen off the best thing to do with an old carb is get it rebuilt an reset then there are great carby i have done a few mod's to mine an have some great improvment's but you need the right tool's t do the job.

I havn't heard of any prob's with the EFI system's on the TB4.2E but im sure one of you out there have

The other i can think of is the clutch fan blades disintergrating wich can only be fixed by regular checks for crack's an replacing when needed

So post up ya probs an answers here an if i can't help im sure one of you other fellow TB4.2E owners can shed some light hope this thread helps

[MUDRATGQ]

Maybe you Mod's might want to make this one a sticky if so could you change the heading to Nissan TB4.2E an RB30 Petrol Tech that way we can cover both types of engine's in the one thread instead of haveing mutiple thread's Cheers

[MUDRATGQ]

An for those of you that are running the 3.0L RB30 there are a few prob's i that come to mind an they are.

The airflow meter's have a prob with giving up at the drop of a hat.

The Input lead plug at the Dissy end after a while get brittle an break causing the engine to stop.

The Head gaskets every now an then go an the head's are prone to crack's between the cylinders if overheated to much'

[tj81]

There are quite a few issues that arise from lack of maintainance, and also in general that are quite handy to know about:

* Blown Head Gaskets - around the 200,000km mark or more.

* Cracked heads if the above is bad enough.

* Points are suceptible to premature lifespans on Gas.

* Sticking auto choke mechanism on the side of the carby.

* Thermostats sticking.

* Pertronix conversion is a good upgrade to GAS cars.

* Fan Clutches can stop working effectively.

Ill add to this later on

[1nismo4x4]

Hey Mudrat, I also have a gr8 petrol engine, mine is the E.F.I which rides in a '92 TI. I'm Ti - TUFF in the shed. What i would like 2 know is what i can do to try and waterproof the dizzy? I have filled all of the electrical connections under the hood with non-conductive grease so no probs there, but i would really like some advice on how to seal the dizzy. I've heard of comp guys pumping a couple of P.S.I of air into them to pressurize the dizzy and people who have rubber glove over with the leads coming out through the finger holes, but is there any other way to do it effectively?

[MUDRATGQ]

Hey Mudrat, I also have a gr8 petrol engine, mine is the E.F.I which rides in a '92 TI. I'm Ti - TUFF in the shed. What i would like 2 know is what i can do to try and waterproof the dizzy? I have filled all of the electrical connections under the hood with non-conductive grease so no probs there, but i would really like some advice on how to seal the dizzy. I've heard of comp guys pumping a couple of P.S.I of air into them to pressurize the dizzy and people who have rubber glove over with the leads coming out through the finger holes, but is there any other way to do it effectively?Gday mate to seal the Dizzy get yourself some ultrablue an undo the cap an smear a heap of it under an arround the edge of the cap an screw it back on same with the little breather plug on top of the cap also on the inside of the lead boot's on the dizzy an cable tie them to the cap an arround the top's of the boots do the same to the sparky lead's they are a bit of a mungrel to get to though an peel back the rubber dust cap on the Coil pull the lead out smear some there an cable tie that boot then put a heap around the inside of the rubber dust cap aswell an cable tie it aswell it's realy the only way other than running an air line to the dizzy but even then you still have prob's with the aboved mentioned if not sealed ive had my engine fully submerged under watter an not a single coff or fart out of it the other thing to do is spray a heap of Lanatec arround an in all electrical conection's especialy your injector plugs an all other genaral electrical conection's as over time they will corrode due to voltage passing through wet connections.Cheer's Hope this help's it's a bit of work but ya shouldn't have any drama's once it's done.

[1nismo4x4]

Thanx for your input, might just get some of that ultralube this weekend and give it a go. have you put an isolator switch on your fan so when in deep water it's not spraying water everywhere or will all be ok once everything is sealed properly?

[MUDRATGQ]

No mate just spray a heap of lanotec on an arround it haven't had any drama's as yet an once everything is sealed the spray wont effect it

[terrain patrol]

I have a TD42 and A TB42 and i find that the cracking on the fan is a common problem on both engines and an obvious design fault that requires continual monitoring.
Tappet adjustment is another common maintenace issue between the two engines!In essense the TB42 and the TD42 are the same engine so they share the same maintenace issues.
Will change my ignition to petronix as soon as funds permit, no more adjusting points or dwell should make me a much happier camper!

[MUDRATGQ]

Why not just upgrade to a injected model electronic an get an aftermarket igniter box that's what ive done give's ya even more spark than the Petronix dose mate.

[GQAdam]

What common mods can be made to a TB42E for more power and economy? Not interested in going the turbo route, but the old petty 4.2 isn't that quick and doesn't mind a drink. A bit of a slug on the highway when towing camper trailer, etc.

I guess the usual bottom-up blueprinting, balancing, etc would help, but also isn't cheap.

So I'm thinking extractors, exhaust, good air filter, leads and plugs.

What else without spending thousands? (car only cost me a few thousand in the first place)

Cheers,
Adam.

[MUDRATGQ]

What common mods can be made to a TB42E for more power and economy? Not interested in going the turbo route, but the old petty 4.2 isn't that quick and doesn't mind a drink. A bit of a slug on the highway when towing camper trailer, etc.

I guess the usual bottom-up blueprinting, balancing, etc would help, but also isn't cheap.

So I'm thinking extractors, exhaust, good air filter, leads and plugs.

What else without spending thousands? (car only cost me a few thousand in the first place)

Cheers,
Adam.About the only mod's ya can do on the budget scale other than an engine rebuild is upgrade the carby to injection electronic dizzy extractors an system K&N airfilter an like ive done port an pollish an shave the head thats about it ive done all bar the injection setup yet an has cost me about 1100 bucks including the injection setup wich im yet to fit.

[GQAdam]

Cheers Mudrat,

I've already got the injection. Guess I need to have a look how the engine breathes. Snorkel, extractors and exhaust.

Was hoping for some easy "magic bullet". ie the throttle body spacer (or whatever it is) for the 4ltr jeep motor.

If only everything was easy and cheap...

Adam.

[MUDRATGQ]

Getting some port work done would be ya cheapst way of more power but in all performance upgrades comes time an money mate just depends on how crazy you want to go

[BeNoS]

hey mudrat how hard was it to put in the efi dizzy and how much it set u back.
also what have u done to convert to efi
would be interested in it mate
cheers benos

[MUDRATGQ]

hey mudrat how hard was it to put in the efi dizzy and how much it set u back.
also what have u done to convert to efi
would be interested in it mate
cheers benosGday mate the Dizzy came as part of the conversion an i just plumbed an aftermarket pro comp ignitor box into it as i allready have a MicroTech ECU for the injection setup it was easy to fit the dizzy i just set the motor to number 1 Top Dead Center an ripped the old one out same with the new dizzy an slotted it in an wired it to the ignitor box an ignition havent done the injection setup as yet butn it's pretty easy if ya got the right tools an know what ya doin the hole conversion cost me 300 bucks pluss 140 for the ignitor box but if ya wanted to you could plobly pick up a complette convo dizzy stock ECU wireing harnness an injection for arround 4/500 bucks just make sure if it's going in a manual you get manual ECU for it an visa versa for an auto

[BeNoS]

ok cheers mudrat are u using just the rx patrol injection system for the conversion or something different

[MUDRATGQ]

Just using the later month 93 std injection as mine mised out by a month an a half on getting it std injection from the factory it's just a factory 93 ST Injection setup mate the RX were 2.8 turbo oilers

[BeNoS]

Just using the later month 93 std injection as mine mised out by a month an a half on getting it std injection from the factory it's just a factory 93 ST Injection setup mate the RX were 2.8 turbo oilers
ah ok never new that the rx was the 2.8 lol my bad.
how hard was it to source all the parts for the conversion.

[MUDRATGQ]

Na you were right mat i thought the RX were only 2.8's untill last weekend when a mate came over in his 4.2 rx

[beefy125]

Hi Mudrat, I own a 4.2 gq efi. Is the a ecu plug in like the one for the 3litre for the 4.2 efi

[MUDRATGQ]

If my memory serves me well they are a stright plug in just be sure if it's a manual you use a manual u an visa versa for an auto

[beefy125]

Sorry Mudrat I think I ment is there a plug in chip like the ones for diesels to make it go better. Not sure if thats what u ment

[BeNoS]

i would imagine there would be a plug in chip or possible to even get the standard ecu played with mate not sure if its possible

[MUDRATGQ]

Yeah mate there is a mob that duz a chip for them just arn't think of the name at the moment

[beefy125]

cheers for that. If you remeber could you let me know. Its kinda funny with fuel goin the way it is we are still lookin for more power and im a uni student. they may be thirsty but gota love em. had a diesel hilux then bought the gq and have never looked back

[Yakman777]

where did you source your injection parts from for your conversion as i am looking at converting an 88 4.2 tb that i have just rebuilt to injection.
any hints would be great.:D

[MUDRATGQ]

Gday mate just got my bit's from a local 4b dismantaler

[Jarrod.]

i bought a 96 GQ ST TB42E the other day. were are the computers located in these

[MUDRATGQ]

Should be located behind the passanger side kick pannel if my memoury serves me right