Torque setting for water rails?

[S3THUNDER]

Hi all,
I bought a pair of stainless steel water rails for my 4.2 cerbera. One is water tight, but the drivers side keeps leeking from one flange , no mater how hard I tighten hex bolts. I'm worried about stripping the threads Does anyone know the torque setting for the rails?

Thanks Mark

[gruffalo]

Not sure of the specific torque figure but I would suggest removal and looking at the "O" ring.

Also lay the water rail on a flat surface and check all the flanges are level and there is no manufacturing fault.

[Supateg]

Wise words from Gruffalo there

Just to add, a dab of sealant on the o rings to 'glue them in place'
Overnight will work wonders for the install. Don't over torque, I used Spring washers
And re checked after a heat cycle, all good.

Hth

[Supateg]

Exhaust is 25ftlb the thread is the same as the water rails and only
5mm length difference as my cloudy memory recalls.
So 25lbft dry. (Ajp block is quite soft so go easy)

[S3THUNDER]

As always, thanks for your advice. The o rings I bought were 3mm thick x 15mm inside diameter,which is what the old ones measured. Then I used a small amount of Hylomar Blue,probably not quite enough.

[ukkid35]

I've had to remove the water rails more times than I care to remember. I've only fitted new seals once, and never used sealant. I suspect either one of the seals has been nicked or there is some debris preventing the seal. They should stand proud of the head and don't need any significant torque to seal, but if insufficient torque were used they might back out.

[fatjon]

Not terribly helpful in this case I know but when I rebuilt the last AJP I helicoiled just about everything. The alloy seems to be somewhere around 60% aluminium, 5% silicon and 35% chocolate.

Well worth doing when the engine's out and can save some pain later as you can then tonk such things up without much worry about stripping threads. It was especially beneficial on inlet manifold, exhaust manifold and water rail fixings. I also did the whole lot round the bellhousing face figuring that with the cars appetite for clutches they might be on and off a few times over the years.

[Cerberaherts]

AJP build manual calls for 20 ft. Lbs.