928@AMG

Hello,

which cylinder head bolts do I have to use for a 16V 5.0 hybrid engine based on an S4 block ?
The stock bolts 4.7 or the longer/shorter screws fron the S4 cylinder heads ?

Ahh btw another question :
How to fix best the CIS air flow meter into the V of the S4 block ?
The according fixing mounts from the stock 4.7 block are missing at the S4 block .


Regards
928@AMG

Vilhuer

What S4 heads you have, early or late? If early you can use either, if new you can only use bolts.

GlenL

You want to use the fasteners that were used with the heads and not the block. This means studs and nuts for the 4.7l 2-valve heads, if I'm following your build right. Studs are better than bolts as you're not wearing the threads in the block on assembly/disassembly and the torque applied is better controlled..

Lizard928

Ding ding ding, Glen has the correct answer!

Ducman82

That's what I used

928@AMG

Hello,

thx for your answers .
To clarify a little bit : I mean I'm building a S4 hybrid engine with CIS and '81 2 valve heads from an Euro "S"

So i should keep the stock bolts and nuts used in the 4.7 block ?
Of course I'll buy new ones...i won't use again the 30yr old fasteners .

Ducman82

the block i used, a 5L from an 86 (if i remember right) had studs. i just left them in and used the euro heads. my euro heads (and intake etc) came off an 86 euro LH, and im pretty sure it had studs.....

928@AMG

Ok thx

Any ideas how to fix the CIS mass air flow meter to the S4 block?