TheSnail
08-08-2004, 02:31 AM
Well first off, I like to say that everybody that says, just get a rb25 oil pan and bolt it up to the rb26 is full of crap. Let me enlighten some people on this issue. Two days ago I went to bolt up the rb25 oilpan to my 26. Major problems. I have heard befor that some one heard from someone that it needs slight modification. Well it needs a crap load of modification. First off, most people think it just bolts up wich is a bunch of bs, second, the other people think that the hole in the the oil pick-up in the baffles is what you have to modify. Let me get this straight with all you guys attempting the swap. Here is the whole list of crap that ypu have to do, I might as well gotten a ka oil-pan and customized it.
On the rb26, It's block shares the bolt holes as the 25 and 20. It also has the inprint of where the 20-25 oil pickup is supposed to go. This means the oil pick up on the 26 is set 3inches more foward then the 20-25.
-The rb26 block has two sets of bolt holes. This means the rb26 oilpan/diff is 1-1.5 inch widder then the 20-25. It also uses 12 and 14 mm bolts while the 20-25 uses all 10mm. The oil pan uses the same 10 mm oilpan bolts as the ka, but the ka uses 18 (I belive) while the rb20-25 oilpan has 29 oilpan bolts. $1.70 a piece from nissan. That is the simple stuff, now for the nasty modifications...
-The oil pick-up... Despite having to cut the baffle plate all to hell to for the oil pick up to fit, YOU HAVE TO cut the 20-25 oil pan to fit the 26 oil-pick up. Since the 20-25 oilpan is 1-1.5 inches more narrow then the 26's oil pan, the side of the oil pan has to be modified by haveing a semicurciule added to be able to fit the oil-pickup. Also there are plates at the back end of the 20-25 oil pan to minimize oil starvation. Well on the 26 oilpan/diif it does not come with those, but instead those plates are attached on the rb26 motor, so that means the plates are coming from above. I ziz-wheeled the 20-25 oil-pan plates off, then hammered them down to be flush. Well, that was not enough, the 26 plates still hit the 20-25 oilpan, so thankfully the metal is malluable, and I banged on it for an hour with a hammer , making it clear anything coming from above.
Before I did all this, I called Mikkinney, for advice on how they did theirs, and they told me that the oilpan is is the hardest part of the swap. They did not know how the made it work, but instead, they had someone else "make it fit". Once I got off the phone I called anouther palce I knew that did a 26, and they did not know what to do, but gave me a number to call for advice, and it was the same # I called 5min ago, Mikinney (spl?). So on my own, I spent about 5-7hrs test fitting it 1000 times, then marked the place that needed to be modded and widdend to fit the oilpickup, then sent it to my custom fabrication guy to let him do the semi-circirle add-on.
-It took me two days to get this whole thing resolved. Going into it blind, thinking the rb25 oilpan "just bolts up" was bs. Atleast I am the first to give you heads up on what you will encounter, as for the others that did the swap, nore they had a bunch of money to just give it to someone else and let them "make it work", or the are just keeping it to them selves. As for me, I like to let everyone after me to be informed.
Since it is 4:30am right now, I will post the pictures of my 25 to 26 oilpan tommarow. And for who ever posts "I know I just get a 25 tranny and oilpan" please correct them.
-Snail
On the rb26, It's block shares the bolt holes as the 25 and 20. It also has the inprint of where the 20-25 oil pickup is supposed to go. This means the oil pick up on the 26 is set 3inches more foward then the 20-25.
-The rb26 block has two sets of bolt holes. This means the rb26 oilpan/diff is 1-1.5 inch widder then the 20-25. It also uses 12 and 14 mm bolts while the 20-25 uses all 10mm. The oil pan uses the same 10 mm oilpan bolts as the ka, but the ka uses 18 (I belive) while the rb20-25 oilpan has 29 oilpan bolts. $1.70 a piece from nissan. That is the simple stuff, now for the nasty modifications...
-The oil pick-up... Despite having to cut the baffle plate all to hell to for the oil pick up to fit, YOU HAVE TO cut the 20-25 oil pan to fit the 26 oil-pick up. Since the 20-25 oilpan is 1-1.5 inches more narrow then the 26's oil pan, the side of the oil pan has to be modified by haveing a semicurciule added to be able to fit the oil-pickup. Also there are plates at the back end of the 20-25 oil pan to minimize oil starvation. Well on the 26 oilpan/diif it does not come with those, but instead those plates are attached on the rb26 motor, so that means the plates are coming from above. I ziz-wheeled the 20-25 oil-pan plates off, then hammered them down to be flush. Well, that was not enough, the 26 plates still hit the 20-25 oilpan, so thankfully the metal is malluable, and I banged on it for an hour with a hammer , making it clear anything coming from above.
Before I did all this, I called Mikkinney, for advice on how they did theirs, and they told me that the oilpan is is the hardest part of the swap. They did not know how the made it work, but instead, they had someone else "make it fit". Once I got off the phone I called anouther palce I knew that did a 26, and they did not know what to do, but gave me a number to call for advice, and it was the same # I called 5min ago, Mikinney (spl?). So on my own, I spent about 5-7hrs test fitting it 1000 times, then marked the place that needed to be modded and widdend to fit the oilpickup, then sent it to my custom fabrication guy to let him do the semi-circirle add-on.
-It took me two days to get this whole thing resolved. Going into it blind, thinking the rb25 oilpan "just bolts up" was bs. Atleast I am the first to give you heads up on what you will encounter, as for the others that did the swap, nore they had a bunch of money to just give it to someone else and let them "make it work", or the are just keeping it to them selves. As for me, I like to let everyone after me to be informed.
Since it is 4:30am right now, I will post the pictures of my 25 to 26 oilpan tommarow. And for who ever posts "I know I just get a 25 tranny and oilpan" please correct them.
-Snail