[TD04G16ASJ80]

Hi all,

I just finished pushing the limits of my G16A and the bottom end went bang, the clutch went as well (10PSI is too much).... I need to find someone selling a short block G16A or advice where to get one cheap to put in for the time being. Ie suzi sport or one stop suzi shop etc?

Also I need some advice on rebuild of my current block.

A little history on my SJ80. It has a G16A, TD04L with front mount and oil cooler for turbo, it has a single shot turbo carby from a G5.

I want to build the block to suit, I have heard other engine parts fit, ie Honda cranks etc. or who make better piston, rods etc for these engines?

Also who builds these engines without charging far too much? Any of the above shops good?

Please don't tell me to upgrade to a G16B or anything else, I want to build my turbo carby and want info on these questions if possible. I have built a lot of cars from 4x4 to turbo carby V8 to big Hp injected cars, I'm happy building what I want cos it's different and so am I.

Cheers

[JrZook]

Did you ever end up checking the AFRs? What actually went?

[TD04G16ASJ80]

AFR's? Yeah piston 1 bottom end bearings went. Scoring on the crank, so spun the bearings.

[JrZook]

Air Fuel Ratios. Got any pics of the damage and the piston crowns?

[TD04G16ASJ80]

Afr was ok, ran about 14.7 idol and about 13.0 wot. Pistons etc seem fine, could linish crank and re bearing but want to build it instead.

[droverdave]

Out of curiosity how are you controlling ignition timing? Was it pinging/detonating at time of big end failure?

[Jester]

you can used a G16B block setup as a G16A different bracing in the casting so less likely to crack

[TD04G16ASJ80]

Ignition is just adjusted for the boost, using standard dizzy. Can't remember if it's retard or advance but one of the two. So no pinging.
Block cracking was not an issue, just spun the bearings. Also wouldn't a g16b be higher compression? Can't be a hood thing under boost

[jdk81]

G16b has diff head and pistons to generate the higher comp.
You can use g16b bottom end and use g16a pistons to obtain the standard g16a comp ratio

[vet 180]

Doesn't sound like you pushed the limits of anything. Bottom end bearing in no1 piston sounds like oil starvation or shagged oil pump to me. The extra strain on the oil pp to drive oil through a oil cooler and turbo wouldn't have helped.

If you have square tires you wouldn't upgrade your suspension to fix the problem would you?

What g16 has the best oil pump?

My opinion throw in another cheap stocker for now and work out what went wrong. Could just be old bearings with lots of kms and crappy oil.

[JrZook]

vet 180 wrote:

Doesn't sound like you pushed the limits of anything. Bottom end bearing in no1 piston sounds like oil starvation or shagged oil pump to me.

Similar to what I was thinking. Post up some pics of the bearings. How many k's were originally on the motor?

[TD04G16ASJ80]

Well the issue is that I don't know what km's are on it as it's an engine transplant into an SJ80. Given the oil marking on the head etc I assume a good few km's.

I am Jains Penrith 10-50 I think.

It was running for over 6 months with the previous turbo at 6 psi for quite a while, but your right it didn't have:
Oil filter relocation
Oil cooler

Would this have starved the engine ya reckon? Is there an aftermarket oil pump option?

I h ave heard I may have been pushing it at over 8psi?

I have just re bearing'd the bottom end, will let you know how it goes

[JrZook]

Just check your oil pressure to see if its in spec. Make sure there isn't any swarf in the oil feeds for the bearings. If there were no signs of detonation on the crowns/combustion chamber then it should be fine.

Are you running a boost gauge to confirm the boost pressure?

[losfer]

What are you using for oil filter relocation and feed and return for oil cooler?

[losfer]

Also curious to what you have found out by ringing around suzuki shops...

[TD04G16ASJ80]

I couldn't see any signs of detonation, it could be age that made it happen. I oil pressure seemed to be fine, I will check on re-start and make sure it's running fine pressure.

I relocated the oil filter so I could run a in line cooler the cooler and re-locator used braided nylon lines and I am taking oil pressure from the turbo intake line at the cooler end. I'm running a cooler as my last turbo burned out due to high oil temps, amazingly it didn't like spooling constantly on the highway.

Definitely have a boost gauge, I'm gonna drop it back down a bit as I keep hearing 8psi max.

The zoom shops are actually very helpful, I'm not the first one to do this project. Seems I have gone a little more in depth than most though