Revision [103]
This is an old revision of Secret-Swap made by Atomic0utlaw on 2023-07-27 17:46:17.
Lets Begin..
Since the 95 spec cam has the required cam position sensor lobe and the power steering drive, it should work.
Next I found the specs for the Mantapart street cams:
Mantapart Mild Cams Specs
Lift:
| Intake | Exhaust |
|---|---|
| 198 degrees @ .050" with .360" | 201 degrees @ .050" with .374" |
Comparisons:
1995 Cam Specs200 degrees @ .050" with .360" lift for the intake
200 degrees @ .050" with .360" lift for the exhaust
LD2 (1990+) Cam Specs
200 degrees @ .050" with .375" lift for the intake
200 degrees @ .050" with .375" lift for the exhaust
Note the 95 intake and the LO Exhaust! Pretty darn close eh!
So I was always wanting to try this theory out, but was unable to find the time or courage to do it. That is where my buddies Mark and Colin came in. Mark really wanted to do this, so he went to alot of effort to find the cams. Colin (V6HO) came in and did the install into Mark's car, and it ran great with no codes.
Next up was Aaron's (Pimpin2da4) car the day before he left for the bash. Judging by him being the only NA car in the Quick 8, I think that the cams show what is possible.
I thought it more prudent to share this with everyone so the whole can benefit from the knowledge gained.
Now, everyone wanting to do this, hit up your local junkyard and get tuning!
www.GMPartsDirect.com
| Part Number | Part Name and Link | Price |
|---|---|---|
| cell1 | cell2 | cell3 |
24574239 Intake camshaft for LG0(95 2.3DOHC) $197.64
22545390 Exhaust cam for LD2(Pre-95 2.3DOHC) $197.64
12355988 - Intake or exhaust cam carrier gaskets (upper and lower)
12363173 - Intake or exhaust cam carrier gaskets (upper and lower)
24575512 - Tensioner. Not required, but if you have timing chain noise..change this. Also, be sure you are familiar with how this part works because it has to be pre-loaded once installed to snug up the timing chain.
24575513 - Tensioner shoe. This will probably break when you remove, so change it anyway.
24575255 - Guide. Not required unless yours are worn.
24575257 - Guide. Same as above.
24575256 _ Guide. Same as above.
992704 - Assembly Lube. Good idea to coat the cam lobes and the carriers where the cam contacts with this stuff.
992869 - Oil supplement. The GM manual calls for this stuff when you do the cams.
12360464 - I think this # is the timing chain cover gasket. (optional)
245752453 - I think this is rthe # for the water pump gasket kit. This is only required if you are doing your water pump. I did my water pump and thermostat at the same time as the cams
CAM UPGRADE
The intake cam is from a 1995 (only) 2.3L Quad 4 engine.. the eighth digit in the VIN is a letter D. Can be found in 1995 Cavalier Z24's, Sunfire GT's, and Olds Achievas. Brand new, it's
>GM part #24574239($197.64). If you're looking under hoods, the casting number on the cam is 245/742 (which IS the same number as the 2.4L LD9, but has 0.360" of lift), and the casting number on the cam housing/carrier is 24574057.
The exhaust cam is from a 1990-94 (only) 2.3L Quad 4 engine.. VIN D as well. Can be found in 90-94 Grand Am's, Olds Cutlass, Calais, Acheiva, and Buick Skylark. Brand new, it's
Melling MC832 from Autozone
>GM part #24570698 or #22545390 (a little confusion there)($197.64). The cam casting numbers are 255/455 (which IS the same number as the HO cams, but only has 0.3750" of lift, not 0.410") and the housing/carrier itself is 22542963.
If you are going to do this swap, here is the complete list of gaskets required. I bought them not as kits because I didn't want to be left over with gaskets I didn't need. When I compared costs briefly with Nate, it would appear that I didn't spend more than him and may have even saved some money because the kit he got had the head gasket, and I didn't get a head gasket. YOU DON"T NEED A HEAD GASKET FOR THE CAM SWAP! I also bought a new timing chain cover gasket, but you don't need to. Unless yours is leaking, you can re-use it. If your car is pre 1997, you may want to change it while you are in there anyway. Here are the GM part numbers:
12355988($8.46) - Intake or exhaust cam carrier gaskets (upper and lower)
12363173($10.30) - Intake or exhaust cam carrier gaskets (upper and lower)
24575512($30.00) - Tensioner. Not required, but if you have timing chain noise..change this. Also, be sure you are familiar with how this part works because it has to be pre-loaded once installed to snug up the timing chain.
24575513(3.00) - Tensioner shoe. This will probably break when you remove, so change it anyway.
24575255($12.23) - Guide. Not required unless yours are worn.
24575257($12.23) - Guide. Same as above.
24575256($12.23) _ Guide. Same as above.
992704($NA) - Assembly Lube. Good idea to coat the cam lobes and the carriers where the cam contacts with this stuff.
992869($NA) - Oil supplement. The GM manual calls for this stuff when you do the cams.
12360464($28.29) - I think this # is the timing chain cover gasket. (optional)
245752453($NA) - I think this is the # for the water pump gasket kit. This is only required if you are doing your water pump. I did my water pump and thermostat at the same time as the cams.
From me to you guys a complete manual on what to do and what not to do and how to swap cams in a 2.4 and what tools are needed and what size.
Don't judge it and stupid comments and grammar checks are not necessary, I think there isn't anything more to add to it.
Just tell me how you like it?
Enjoy It is a little long, sorry.
Camshaft swap
The model specs were taken from only 2 door versions of each model, engine availability is not always the same for the 4 door version of these models.
1988-1995 Buick Skylark
1988-1989 - 2.3L Quad 4 DOHC (LD2) 150HP Model: Custom, Limited
1990 - 2.3L Quad 4 DOHC (LD2) 160HP Model: Custom, Gran Sport
1991 - 2.3L Quad 4 DOHC (LD2) 160HP Model: Custom, Gran Sport, Luxury Edition
1992 - 2.3L Quad 4 OHC (L40) 120HP Model: Base
1993-1994 - 2.3L Quad 4 OHC (L40) 115HP Model: Custom, Limited
1995 - 2.3L Quad 4 DOHC (LD2) 150HP Model: Custom, Limited
1990-1994 Chevrolet Beretta
1990-1992 - 2.3L Quad 4 DOHC (LGO) 180hp Model: GTZ
1993 - 2.3L Quad 4 DOHC (LGO) 175hp Model: GTZ
1994 - 2.3L Quad 4 DOHC (LGO) 170HP Model: Z26
1995 Chevrolet Cavalier
1995 - 2.3L Quad 4 DOHC (LD2) 150HP Model: Z24
1992-1995 Oldsmobile Achieva
1992 - 2.3L Quad 4 OHC (L40) 120HP Model: S
1992 - 2.3L Quad 4 DOHC (LD2) 160HP Model: S, SL
1992 - 2.3L Quad 4 DOHC (LGO) 180HP Model: S
1992 - 2.3L Quad 4 DOHC (W41) 190HP Model: SCX
1993 - 2.3L Quad 4 DOHC (LD2) 155HP Model: S, SL
1993 - 2.3L Quad 4 DOHC (LGO) 175HP Model: S
1993 - 2.3L Quad 4 DOHC (W41) 185HP Model: SCX
1993-1994 - 2.3L Quad 4 OHC (L40) 115HP Model: S
1994 - 2.3L Quad 4 DOHC (LD2) 155HP Model: S, SC
1994 - 2.3L Quad 4 DOHC (LGO) 175HP Model: SC
1995 - 2.3L Quad 4 DOHC (LD2) 150HP Model: S SERIES I & II
1988-1991 Oldsmobile Calais
1988-1989 - 2.3L Quad 4 DOHC (LD2) 150HP Model: International, SL
1990-1991 - 2.3L Quad 4 DOHC (LD2) 160HP Model: International, S, SL
1990-1991 - 2.3L Quad 4 DOHC (LGO) 180hp Model: International, S, 442
1991 - 2.3L Quad 4 DOHC (W41) 190hp Model: 442 W41
1990-1991 Oldsmobile Cutlass Supreme
1990 - 2.3L Quad 4 DOHC (LGO) 180HP Model: International
1990 - 2.3L Quad 4 DOHC (LD2) 160HP Model: Base
1991 - 2.3L Quad 4 DOHC (LD2) 160HP Model: Base
1988-1995 Pontiac Grand AM
1988-1989 - 2.3L Quad 4 DOHC (LD2) 150HP Model: SE, LE
1990 - 2.3L Quad 4 DOHC (LD2) 160HP Model: SE, LE
1990 - 2.3L Quad 4 DOHC (LGO) 180HP Model: SE
1991 - 2.3L Quad 4 DOHC (LD2) 160HP Model: LE
1991 - 2.3L Quad 4 DOHC (LGO) 180HP Model: SE, LE
1992 - 2.3L Quad 4 DOHC (LGO) 180HP Model: GT
1992 - 2.3L Quad 4 OHC (L40) 120HP Model: SE
1992 - 2.3L Quad 4 DOHC (LD2) 160HP Model: SE, GT
1993 - 2.3L Quad 4 DOHC (LGO) 175HP Model: GT
1993 - 2.3L Quad 4 DOHC (LD2) 155HP Model: SE, GT
1993-1994 - 2.3L Quad 4 OHC (L40) 115HP Model: SE
1994 - 2.3L Quad 4 DOHC (LGO) 175HP Model: GT
1994 - 2.3L Quad 4 DOHC (LD2) 150HP Model: GT
1995 - 2.3L Quad 4 DOHC (LD2) 150HP [Model: SE, GT
1990-1991 Pontiac Grand Prix
1990 - 2.3L Quad 4 DOHC (LD2) 160HP Model: LE
1991 - 2.3L Quad 4 DOHC (LD2) 160HP Model: LE, SE
1995 Pontiac Sunfire
1995 - 2.3L Quad 4 DOHC (LD2) 150HP Model: GT
EDITS/commets
Nice info, but I wanted to point out that there is a mistake. The exh. cam casting number is not 255 455
its actually 225 455
Now in all of the FAQ and the write ups on the secret cam swap they state that you DO need the exhaust housing and lifters because they are just simply too big for the 2.4 exhaust housing. Now I know you can use the stock 2.4 intake cam housing and lifters yes.
from what I understand I the W41 has 0.410"lift and requires the older housings (with 35mm lifters) but if you use the HO cam (less lift not sure how much) you are fine with the 33mm lifters (or 96-02 housings)
as far as using pulley power steering, I used the common 2.3 1995 intake shaft, it has a little less lift but it has the hex insert.
Nope, no need to mod the cams.. Make sure you get the INTAKE came from a 95 2.3L because it has the hex for your 2.4 power steering pump. Thats it..
exhaust cam from a 90-94 2.3L
2.4 lifters
The swap includes: (note, turn engine 90 degrees odd TDC, so all the pistons are down, and risk of damaging a valve is out)
-remove plastic shiels to gain access to the passenger bottom of engine
-support lower passenger side with a jack
-remove upper motor mount
-move coolant resivour (unhooked 2 lines)
-remove belt
-pull the crank pulley off (puller)
-remove the side cover (20-25 10mm bolts and 3 nuts)
-remove chain and exhaust timing gear
-unbold the whole side cover from the block (13-15 bolts 10,13mm)
-remove IDI cover (unhook ignition plug)
-remove the top 10 bolts on the cam housing carrier
-replace cam
-reverse process (with the exception of reseting the chain tensioner and you need to time the engine)
tools needed:
-pliers
-jack
-3/8" ractchet and 6" extension
-10,13,15mm sockets (I prefer deep when I get to the chain tensionor and the tensionor pivot)
-15mm wrench to reinstall belt
-pulley puller.
Should take about 2 hours, maybe 3-4 if it is your first time. In 8 hours you can easily do a head gasket, cams, water pump, test drive, and get half loaded.
