...BTW your Bieber avatar is awesome.-Malone
Quote from: Toby on August 24, 2012, 09:26:20 pmWhat causes the blocks to crack through the bolt holes is water and oil in the bottom of the bolt holes. When the bolt goes in the oil has nowhere to go so it splits the bolt boss when the pressure gets high enough. no, thats not the only thing that splits these blocks..the bolts only engaging half of the threaded boss works against them as welli cracked a block from boost..the head had never been off before i got it, and i removed it with extreme drive pressure..To the OP:ive built/rebuilt more 1.5Ds than i care to count, and they ALL crack..the 1.5Ds are not really worth messing with. thats why i got rid of all mine.get a 1.6. the 1.5 only gets like .2mpg better, and is way harder to get parts for.
What causes the blocks to crack through the bolt holes is water and oil in the bottom of the bolt holes. When the bolt goes in the oil has nowhere to go so it splits the bolt boss when the pressure gets high enough.
I had an 11mm block crack when using ARP studs with meticulously cleaned and prepped bolt holes. I won't even do a head gasket anymore on an 11mm block.
If you do crack it the 100. isn't wasted you could sell them to almost any gasser guy and recoupe the cost.I have seen a video of a guy cracking the head bolt bosses with 45lbs on a junk block. The holes were filled with oil, 1/2 full, and a couple almost empty, but they did crack. All in all everyone is right on here from what I have heard about the 11mm blocks just being weak, so good luck.
Don't bottom the studs, hold them ~1/4 turn shy.