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 Re: Gen 2 part Upgrades for Gen 1 Montero
[Re: KrzyDav]
#1076105
01/08/15 07:12 PM
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Joined: Nov 2008
Posts: 1,435
Body Damage is Cool
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I did the gen 2 caliper swap, never had an issue with using gen 1 rotors. Just remember this is a documented safety issue. The Gen 1 V6 rotors start out 2mm thinner (22mm) than the Gen 2 RS/LS (24mm - minimum wear spec 22.4mm) so there is less material This is just a concern if you put SR calipers on L.S./Sport/V6 Gen 1 rotors. I have L.S. calipers and original new V6 Gen 1 rotors. AllData , et.al. show that's all ok. -----Just make sure you match up SR calipers with SR rotors if you do this modification.------ I'd be sure super cautions about this. The Gen 2 rotors are the same diameter and thickness 24mm (new) RS/LS 27mm new SR and Gen 1 (V6) are 22mm (new). Best thing to do is verify the thickness of the replacement rotors and be sure they are matched to your caliper. So if you are sticking any Gen 2 caliper on a Gen 1 rotor, you are putting them on a rotor that is under the minimum design wear limit for thickness.
Last edited by plh; 01/10/15 06:50 PM.
- '83 Might Max: IG @83mmax
- '88 Raider: my OG
- '89 Raider: rescued
- '92 RS M/T: sold
- '93 SR: sent to crusher
- '05 Montero LTD: sold
- '18 PHEV: wife's daily
- '14 OL GT
- http://www.tuffpans.com
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Re: Gen 2 part Upgrades for Gen 1 Montero
[Re: plh]
#1076106
01/09/15 04:38 AM
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Joined: Dec 2007
Posts: 2,348
Body Damage is Cool
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All that ^^^^ being said, get the rotors along with everything else, you'll be good to go. Well, actually, good to stop.
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Re: Gen 2 part Upgrades for Gen 1 Montero
[Re: plh]
#1076107
01/10/15 05:56 AM
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Joined: Jul 2009
Posts: 305
Mudrunner
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I did the gen 2 caliper swap, never had an issue with using gen 1 rotors. Just remember this is a documented safety issue. The Gen 1 V6 rotors start out 2mm thinner (22mm) than the Gen 2 (24mm - minimum wear spec 22.4mm) so there is less material This is just a concern if you put SR calipers on L.S./Sport/V6 Gen 1 rotors. I have L.S. calipers and original new V6 Gen 1 rotors. AllData , et.al. show that's all ok. -----Just make sure you match up SR calipers with SR rotors if you do this modification.------ I'd be sure super cautions about this. All the Gen 2 rotors are the same diameter and thickness 24mm (new) no matter if they are RS/LS/SR (or Montero Sport) and Gen 1 (V6) are 22mm (new). Best thing to do is verify the thickness of the replacement rotors and be sure they are 24mm. So if you are sticking any Gen 2 caliper on a Gen 1 rotor, you are putting them on a rotor that is under the minimum design wear limit for thickness. Has anybody actually seen pads dislodge? From what I have learned the reason for min spec is heat dissipation after min spec the rotor can't cool off so it warps causing peddle pulsation, Easy to notice and repair before safety issues. I have seen rotors worn all the way down to the vents and pads with no lining and partially worn backing plate, what usually happens is the peddle goes to the floor due to piston coming out of the bore and losing hydraulic pressure. Obviously this is an extremely rare and careless condition, but still pads where solid.
Last edited by bodyswapped8789; 01/10/15 06:01 AM.
89 V6 manual trans Dodge Raider frame 87 cold weather pkg 2" body lift, Soft 8's wraped in BFG km2 33x10.5x15, JDM Pajero yellow Bosch fogs. Yackama basket. Duel bouncies gen II rear springs,gen II ft brakes,master and booster.
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Re: Gen 2 part Upgrades for Gen 1 Montero
[Re: Kevin C]
#1076109
01/10/15 06:54 PM
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Joined: Nov 2008
Posts: 1,435
Body Damage is Cool
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Just remembered that I still have the boxes for the calipers in my garage so I checked part numbers (fixed in the above post) and checked on Amazon today. Super ON SALE! Verified the rotor thickness with a caliper and the SR rotors do measure 27mm thick. Edited what I could in the above posts.
- '83 Might Max: IG @83mmax
- '88 Raider: my OG
- '89 Raider: rescued
- '92 RS M/T: sold
- '93 SR: sent to crusher
- '05 Montero LTD: sold
- '18 PHEV: wife's daily
- '14 OL GT
- http://www.tuffpans.com
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Re: Gen 2 part Upgrades for Gen 1 Montero
[Re: plh]
#1076110
01/10/15 10:04 PM
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Joined: Aug 2009
Posts: 989
Rock Warrior
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Good info guys ...
I have a set of 95 SR and 99 Sport brakes ... The Sport brakes are the same braking just lighter weight parts ..I am going to go with the Sport brakes for the SWB and the driving I do ...
Gen2 truck door armrest bolt on to Gen1 Montero and are much nicer and bigger ...DSM car steering wheels give better arm room...A little smaller and flater...
Last edited by haztoys; 01/10/15 10:23 PM.
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Re: Gen 2 part Upgrades for Gen 1 Montero
[Re: Kevin C]
#1076111
01/13/15 06:01 AM
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Joined: Jul 2009
Posts: 305
Mudrunner
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Rotor thicknessBrake info from a long time ago... And advice about mismatched parts. Pad Slippage Yes it did happen. Point taken and I will be sourcing gen2 rotors, however I have worn a set of pads sence the swap, replaced them around 1.5mm without coming even close to pads coming out of the bracket. I machined the rotors and only need one pass the resurface so that indicates no warpage what so ever less then .002in off each side, this was done pretty recently. So I do agree the potential for disaster is there as rotors and pads get closer to discard. The difference may have been the brand new gen1 rotors before doing the gen2 calipers also driving habbits may play a factor. I tow rarely and when I do it's a small trailer with lighter loads. Sorry for the bad advise, just speaking from experience. Brake Dimensions and Calculations
89 V6 manual trans Dodge Raider frame 87 cold weather pkg 2" body lift, Soft 8's wraped in BFG km2 33x10.5x15, JDM Pajero yellow Bosch fogs. Yackama basket. Duel bouncies gen II rear springs,gen II ft brakes,master and booster.
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