Thread: Turboed Isuzu Reliability

I was given the same cautionary advice not to fit a turbo. There's no risk in advising someone against fitting one but risk in advising to fit a turbo. I now run without the wastegate and so boost reaches about 19 psi. I've had mine set up for over 3 years without any sign of a problem even though I've reached some scary EGTs.

I would fit an EGT when fitting the turbo.

Originally Posted by land864

........Rijidij's is a factory turbo though.

I know the guys on here who have retrofitted turbos to their 4bd1's are more than happy but my concern is that the factory turbo has oil squirters under the pistons to assist with cooling and the NA does not.

As I intend to use mine outback and towing I don 't want an overheating issue.............

As nice as it is to have oil squirters, just remember that these Isuzu engines are originally designed for heavy trucks that work all day, not a 2.5t 4WD, so they really aren't a necessity for what we do.
For example, my engine came from a 7000GVM truck, so in theory, at factory specs for the 4BD1T, it could actually see a situation where it's driven continuously at full throttle with 13.8psi boost and 750*EGT...........and that's pulling 7 ton.
These engines generally run pretty cool. As long as you set things up properly when fitting a turbo, overheating is not an issue as far as the engine itself is concerned.

Originally Posted by 1103.9TDI

So many variables here, I mean, who knows , your engine might go tits up almost immediately after fitting the turbo, but to my mind, whataway to go!!, with an Isuzu, you don't need as much good luck as you might do with the rest.

As I indicated above, these are not your average 4WD vehicle engine. The standard N/A 4BD1 is built to deal with heavy duty uses off the shelf. They are easily capable of handling a retrofitted turbo. There are few differences between the N/A and Turbo versions.

Cheers, Murray

Originally Posted by Blknight.aus

if you have the stock 4bd1 15psi and pre turbo EGT of about 500.

So at 30psi and pre turbo @650c is a bad idea N/A lucky I have 3 Isuzu's, I was figuring that was a lifetimes supply if I lived to 100

Originally Posted by rovercare

So at 30psi and pre turbo @650c is a bad idea N/A lucky I have 3 Isuzu's, I was figuring that was a lifetimes supply if I lived to 100

You wild child Matt

Make sure you keep an accurate record of when you fitted it, so in 20 years time when the first one dies you can tell any of us that are still alive how many K's it did (so the tentative among us can plan for a turbo install knowing that its safe ).

I wonder if you Nervous Nellies should really own an Isuzu. It's a rugged motor built into a rugged 4x4.....not for the faint hearted!!!

Better sell them to me so you don't lose any sleep at night worrying about them.


Cheers
Danny

ps, they'll still be going strong when we're all dead and buried

I think we need some stories of failure. Seems to me that there are lots of turbos on 4BD1s and not very many stories of them blowing up.

I can't think of any on the forum, maybe one or two turbos blown due to high EGT (intentional or known-risk) silliness.

Originally Posted by steveG

You wild child Matt

Make sure you keep an accurate record of when you fitted it, so in 20 years time when the first one dies you can tell any of us that are still alive how many K's it did (so the tentative among us can plan for a turbo install knowing that its safe ).

I want to run 750C but I think I'd need to fit a external wastegate to keep the turbo at 30psi and the fact my things to do list is huge, it'll be 20years by the time I do

Originally Posted by rovercare

I want to run 750C but I think I'd need to fit a external wastegate to keep the turbo at 30psi and the fact my things to do list is huge, it'll be 20years by the time I do

is gettin hitched one of those things hee hee hee