Thread: The old Warped Exhaust Manifold TD5

Good job.
Better than paying someone to rip your wallet clean.

Now you can cut the webbing from the old manifold, and watch it magically straighten out again, and keep it for a spare.

Hi
When mine went i replaced them with high tensile studs and just machined the manifold!
Never given me a drama since, with an ECU UPGRADE

Originally Posted by bronson

Hi
When mine went i replaced them with high tensile studs and just machined the manifold!
Never given me a drama since, with an ECU UPGRADE

I thought of using high tensile or oversize (drill out & retap) . Two different workshops that have tried this both said that it will strip the thread and next time will need a helicoil. So I stuck with the standard studs. I am sure my ecu upgrade and the increased exhaust temp was partialy responsible for the warp but the increase in power is worth it.

My exchange manifold was machined and the webbing was drilled with a 12 mm bit. Aparently this helps reduce the warping.

Mike

Yep, if you don't mod the manifold, you'll just bust your new studs as well, even upsized studs won't hold.

Drill, cut or grind the webbing, slightly open all the stud holes on the manifold EXCEPT the centre two (these need to be left standard to locate the manifold properly). This allows for expansion, without putting sideways pressure on the studs and breaking them off.

I must be lucky

Ok, so I have the dreaded whistle as well.

I have managed to get the gaskets & nuts, but cant get hold of the studs until next week.

Now, I am going to have a good look tomorrow, but what I am wondering is, if I can remove the manifold, & replace the gasket, after doing the trick with the webbing, and the studs are all ok, do I actually NEED to replace the studs?

I have also read a few different thoughts on whether to use oversized studs or just replace with the same size. IF I need to replace the studs, I have decided that I will use the original sizing, as should the need arise again to do the gasket, I will have the option at that point of going up a size.

So, do I need new studs if the old ones are still there & ok?

For the few dollars it will cost, removing any potentially weakened studs will be well worth it.

As for oversized studs. I've even seen them break. Not worth the hassle and cost in my opinion.

Yea, that is what I was thinking.

Only catch is that it will have to be next weekend now before I get a chance to do it, after I get the new studs on Monday.