Fixing up Turbo and Manifold

**Sigmeister** · 22-04-2008, 12:34 PM

OK, I finally started working on my 3T-GTE. I basically just want to pull it all apart, give everything a good clean\paint\polish and put it back together. At this stage not looking for any massive power, essentially it is all cosmetic.

I pulled the turbo off and there appears to be some pitting on the Inlet

:

What's the best way to tackle this? I was thinking about using the die grinder, but was just a bit worried about the walls becoming thinner. Would this be OK, or should I use another method?

Also the manifold is looking a bit worse for wear:

I was considering sending it away to be Jet-Hot coated. But a few things first.
1) Would the crack on the right side be able to be repaired?
2) Should the threads come out with some elbow grease?
3) Does anyone have a rough estimate of how much it would cost to get Jet-Hot coated?

Thanks
Brett

**oldcorollas** · 22-04-2008, 12:46 PM

that is turbo inlet.
was it there before? ie a casting defect?
if it is clean and bits are not falling off.. leave it.

crack can probably be repaired.. carefully.
2/3 no idea

**Sigmeister** · 22-04-2008, 12:58 PM

Originally Posted by oldcorollas

that is turbo inlet.
was it there before? ie a casting defect?
if it is clean and bits are not falling off.. leave it.

Oops! OK Inlet
I am not sure, I have had this engine for a long time. I purchsed it and have never had it running. It may well have been like that. No bits are falling off that I can see. i was just looking to make it a little smoother, that's all.

**abently** · 22-04-2008, 01:01 PM

As OCs' said leave the pitting there. Grinding it out isn't going to do anything unless the solution causing the pitting is still on the surface....

The crack can be re-welded but make sure they are going to heat the item up in a furnace before re welding. If they do, then it won't re-crack and you can then sensibly get it ceramic coated.

Use HPC for ceramic coatings btw.

Leave the threads in also if you can. Its a headache to remove them and you may end up damaging it....

**LeeRoy** · 22-04-2008, 03:32 PM

HPC coating will cost between $200 and $300. My manifold which is significantly larger than yours was $260 iirc.

Those studs will be a prick to remove and if you break one in there then that will be no fun. Ideally new studs would be alot nicer though.

Maybe just get another manifold instead of repairing your one and also get some extra bracing added possibly. Although it could just be a one off ie your ones had a hard life.

**Sigmeister** · 22-04-2008, 03:37 PM

A new manifold is certainly an option. That's why I posted here, to see what people think. I just wasn't sure what a new manifold cost.

So if it's cheaper to buy a new one then fix this one, then I'd look at that, but in the end, I'd still have a play with this one for practice.

**LeeRoy** · 22-04-2008, 03:52 PM

A stock 2nd hand manifold will cost you around $150 - which is what seems to be the going rate for them around here. Mind you thats one without cracks

Id take a guess that to get your one welded up would be in the viscinity of $50 but then if its cracked once whats to say it wont crack again.

It might also pay to have the surfaces checked for straightness as torquing (sp?) up a warped manifold will put undue strain on it and more than likely increase its chance of developing cracks.

**oldcorollas** · 22-04-2008, 05:02 PM

is that a crack i spy developing on the LHS also? (halfway down, at the casting flash?)

**o_man_ra23** · 22-04-2008, 06:22 PM

Two nuts screwed together super tight then undo the studs by using the nut furthest from the free end of the thread as the head. Also heat the shit out of the manifold around the studs before trying to undo them. Pulled all the studs out of my 3S manifold without issue that way.

But as said, your better off buying a replacement manifold. Also agree that removing the pitting is not necessary, and will only increase your chances of wrecking things.