Rollover_Red Posted March 21, 2014 Report Share Posted March 21, 2014 Soo after looking at a couple lz22 builds, I noticed a lot of people are running the z22s block, and the water ports are different than my z22e. As I was comparing them to my head (w53), I noticed the head water ports ran parallel with the head and the z22e water ports are more perpendicular to the block. Forgive my horrible description, im posting this on my phone and posting pics from photobucket is damn near impossible. So what im basically getting at is this; how much do I need to modify the water ports for the head and block to work without blowing a head gasket every week? Haha Quote Link to comment
datzenmike Posted March 21, 2014 Report Share Posted March 21, 2014 See Doug (sealik) Quote Link to comment
hang_510 Posted March 22, 2014 Report Share Posted March 22, 2014 use the Z22 HG on the head and vice-versa. i only had to drill 4 holes in my block Quote Link to comment
Sealik Posted March 22, 2014 Report Share Posted March 22, 2014 I drilled 7 holes in my Z22S block (LZ23)....the '8th' hole was already in the block 9 in HG Those holes corresponded with the larger part of the teardrop in the L head coolant passages....which also positioned the holes in the deck a little farther apart from each other.....which in turn left a little more meat on either side..... relative to the cylinder walls and the outside of the block. If that makes any sense......lol 7 holes here And 2 larger ones at the back 1 Quote Link to comment
jvb5577 Posted March 23, 2014 Report Share Posted March 23, 2014 I did the same as above but my block was out of a 200sx which it looked like this. I had Dave Rebello get all my parts, completely rebuild my head, and check everything. He suggested since I was just using the engine as a DD that I could get away just drilling the holes in #3 as thats the one that gets the hottest. I did it in all of them anyways. So far truck runs nice a cool, even on hot days in traffic. 1 Quote Link to comment
Rollover_Red Posted March 24, 2014 Author Report Share Posted March 24, 2014 Thats what my block looks like. I guess I have the 200sx block. Everytime I find a write up on what to do (like sealik), its with a different block. I need to know what I have to do for my exact block. Quote Link to comment
jvb5577 Posted March 24, 2014 Report Share Posted March 24, 2014 Same as sealik. In the 200sx block you just have funky holes. I just set the L20B gasket on the block and marked the holes, then drilled them out. Pretty easy. The shop vac trick really helps too! For the large port at the end I just used a big bit. Didn't make it an exact match. Thats what my block looks like. I guess I have the 200sx block. Everytime I find a write up on what to do (like sealik), its with a different block. I need to know what I have to do for my exact block. I thought I had some pictures but can't find them :blush: 1 Quote Link to comment
Rollover_Red Posted March 24, 2014 Author Report Share Posted March 24, 2014 One more stupid question, should I drill out the driver side holes on my w53? They arent drilled out and the holes on the block are. Quote Link to comment
Rollover_Red Posted March 24, 2014 Author Report Share Posted March 24, 2014 Here is a Oic of the head and thr block before drilling. Any comments? Quote Link to comment
MicroMachinery Posted March 24, 2014 Report Share Posted March 24, 2014 You shouldn't have to drill into the head at all. All I did was chamfer the little oiling hole in the head toward the one in the block. Make sure to clean it out!!! Quote Link to comment
Rollover_Red Posted March 24, 2014 Author Report Share Posted March 24, 2014 But half of the holes on the head arent drilled. Wouldnt that create hot spots for the chambers? Quote Link to comment
jvb5577 Posted March 24, 2014 Report Share Posted March 24, 2014 No need to drill into the head. The other holes in the block that don't match up with the head will just be covered up with the head gasket. Just use the L20B head gasket as a guide on your block for what holes need to be drilled. 1 Quote Link to comment
Rollover_Red Posted March 25, 2014 Author Report Share Posted March 25, 2014 Well what if I were to go all out and match damn near all of the holes? Quote Link to comment
datzenmike Posted March 25, 2014 Report Share Posted March 25, 2014 But half of the holes on the head arent drilled. Wouldnt that create hot spots for the chambers? Not all holes in the block match to the head. Nissan would have run these motors and found that it was running too cool on some combustion chambers and so would leave them closed and others open. The L series has the intake and exhaust on the left side so I would expect more cooling holes on that side to carry away heat from the intake ports. This is not a problem on the cross flow Z series head. I would try to make the Z block flow the same as if it was an L series block. 1 Quote Link to comment
Rollover_Red Posted March 25, 2014 Author Report Share Posted March 25, 2014 These are the water holes above cylinder number 3. I put a L20b headgasket above it to show where the holes "should" be and my head doesnt have half the holes. The left side holes are there and the right side are not. I want as much water flow as I can get since my car will be taking a beating over this summer for all the car shows I will be attending Quote Link to comment
Rollover_Red Posted March 25, 2014 Author Report Share Posted March 25, 2014 Thank you mike. That makes a whole shit ton of sense. Soo I should really just match the holes on my head to the block? Not soo much the headgasket to the block? Quote Link to comment
Rollover_Red Posted March 25, 2014 Author Report Share Posted March 25, 2014 Im going for it. halfway done drilling the block...... Quote Link to comment
jvb5577 Posted March 25, 2014 Report Share Posted March 25, 2014 Im going for it. halfway done drilling the block...... :thumbup: Snap some pictures when done! 1 Quote Link to comment
datzenmike Posted March 26, 2014 Report Share Posted March 26, 2014 Thank you mike. That makes a whole shit ton of sense. Soo I should really just match the holes on my head to the block? Not soo much the headgasket to the block? Ex freekin' zactly! You are making an L block out of a Z block. Doesn't matter what the block was ... it has to supply water to an L head and not all the holes in the gasket join a hole in the block to a hole the head. Quote Link to comment
hang_510 Posted March 27, 2014 Report Share Posted March 27, 2014 I want as much water flow as I can get since my car will be taking a beating good plan. i run a 190* thermo w/a 3 core stock rad. runs around 185* never overheated but does get warm in summer traffic. Quote Link to comment
Rollover_Red Posted March 27, 2014 Author Report Share Posted March 27, 2014 good plan. i run a 190* thermo w/a 3 core stock rad. runs around 185* never overheated but does get warm in summer traffic. Well I also do t want the motor running too cold either. Im running a 196 thermo with a koyorad radiator and a nice e fan. We shall see how it turns out. Quote Link to comment
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