From what I've read, this is the correct stud. I havn't run it myself, but these are the part numbers I'll be ordering, I'll keep you posted.Trench_Rat said:so these are the correct 12mm x 1.25 mm bolts then? or are these 10mm bolts? true dohc zc's have a 12mm bolt the 10mm bolts are from d16a7 i beleive
I was under the impression that the studs used in the VW kit were too short, but would work without washers. Any part numbers on this 1/2 inch longer stud?strudel said:No offense taken as I probably should have been more specific. The studs I posted are from an 89 D16A1 very often confused to be a ZC which of course it is not. Having said that, there are many different ZC engines from different years of Hondas.
I make a bold assumption here that it may be the 88-91 blacktop valve cover bolts on the outside of the cover model that you are talking about. Not once in this thread or the one in the original post did anyone qualify what ZC was being talked about. i.e year or car model. Only one person alluded to the A1 and that the studs were the same. I will also state the person that used those studs was emphatic that the thread was an 11 mm x 1.5 pitch and that he had to use that size tap to clean out the holes in the block.
Here are the quotes:JS
They consist of the ARP stud kit #204-4702 (tapered shank version), a can of Brakleen brake cleaner, an M11 x 1.5 metric tap, a 3/16" socket (for turning the tap), a small wire brush (for cleaning up copper pipes), and some WD-40. Trust me, the correct tap for this block is M11 x 1.5. It took 4 trips and a lot of swearing at the Helms manual (The Helms incorrectly states M11 x 1.25) to get this right.
No, that is not an illusion. One of the head bolts is longer than the others (the one directly behind the water pump). I have no idea why Honda did this, but it created a problem. The ARP head stud kit came with 10 studs of equal length. The kit is actually for a 2.0L VW engine. There is no kit made for the D16A1 or ZC engines, but the VW kit happens to fit perfect...well, almost. Luckily, ARP makes a 1/2" longer version of the studs in the kit. That was perfect! I called them up and they had it on my doorstep in 2 days for $11. The ARP studs are on the left and the stock head bolts are on the right.
JDM 88-91 Blacktop DOHC ZC:
Studs: ATP6.760-1LB (x 10)
Washers: APW1316N (x 10)
Nuts: APN12-1 (x 10)
1989 Integra Blacktop DOHC D16A1:
ARP P/N: 204-4702 (tapered shank version) + 1 special order stud 1/2" longer. (working to get official part #).
The one at the top works for JDM DOHC ZC.staticchmbr said:damn right, its not a zc! you can interchange the parts, but the biggest difference is the motor mounts. they did make a 1g zc that is basically the same as the 86-87 d16a1 though, but im not going into detail.
so anyways, whats the "official" part number for the longer stud??