Thread: Exhaust manifold studs.

Where the manifold joins to the head? If it is one of the end bolts, ie. among the last in the torquing sequence, it should be ok to remove and replace the bolt. Or you could just put a nut on what's left.

If you meant the studs at the bottom of the manifold just put a replacement nut on. Use lots of locktite.

Shell

Originally Posted by Bohica

Do yo need to remove the exhaust manifold to remove the studs'm Just curious as I have a stud without a nut on it. #1 piston. Another item on the list.

Ta

Julian

Be very careful !! Td5 manifold studs are made out of the reject Wensleydale cheese from the old 'Wallace & Gromit' movies. If you can get two nuts on it I'd try VERY CAREFULLY to remove the stud and replace it. The chances of being able to torque a new nut on the old stud is slim. I wish you well.

Deano

Originally Posted by DeanoH

Be very careful !! Td5 manifold studs are made out of the reject Wensleydale cheese from the old 'Wallace & Gromit' movies. If you can get two nuts on it I'd try VERY CAREFULLY to remove the stud and replace it. The chances of being able to torque a new nut on the old stud is slim. I wish you well.

Deano

Ahh, how about with no nut and 4mm below the level of the manifold. The stud has snapped.

Try drilling and easyouts. The broken ones i have done have come out fairly easy, just a matter of access for the drill.

Hey Julian
Have you previously de-webbed and machined flat your exhaust manifold? Could have warped and stretched the stud and then allowed the nut to vibrate off?

Here’s some good replacement options
Td5 manifold extended stud kit - AlliSport
HD TD5 Exhaust Manifold Stud Kit

And if you haven’t already get your manifold de-webbed skimmed flat then ceramic coated!




Lemo

Originally Posted by knuts2au

Try drilling and easyouts. The broken ones i have done have come out fairly easy, just a matter of access for the drill.

These LH drill bit easy out kit may do the job without even using the easy out

10pcs Easy Out Screw Extractor Set Matched Left Hand Drill Bits Broken Bolt New | eBay


Not to be confused with the conventional RH twist drill kits .

Deano

Originally Posted by Bohica

Do yo need to remove the exhaust manifold to remove the studs'm Just curious as I have a stud without a nut on it. #1 piston. Another item on the list.

Ta

Julian

If the same as D2 V8 then no.

Process for a V8

Spray with WD40 or similar
Undo the nuts holding the the exhaust pipe to the manifold. Sometimes the stud also comes out with the nut. (bonus)
Drop the exhaust pipe
Double nut any studs left.

If you do brake one then the manifold will most likely need to be removed but this is also an easy job to remove and replace.

Regardless, pull the manifold off as it sounds like yours has warped (it happens) and needs attention to deal with the cause of the missing nut and broken stud.