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KS_DAK47
Dodge Dakota
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11/10/2003
23:22:12
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 Subject: HO cams and Intake
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OK everyone, I have been doing a little research on upgrades for the 4.7 magnum. I created this thread for everyone to share there experience with the HO cams and intake. (eg. Installing, horsepower gains, problems, reliability, if you had to do any other mods to get the Hos to work, and so on) by the way here is a link I found to buy the ho cams and intake.
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Kowalski
Dodge Dakota
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11/11/2003
16:06:41
|  RE: HO cams and Intake
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The trickiest part of the installation is the valve cover R&R. Gaskets are reusable, make and use the timing chain wedges, zip tie the chain to the sprockets. You can skip the special tool if you put a breaker bar on your crank bolt to hold things steady, being careful not to stress the locating pins for the sprockets when you bolt them back on. Biggest problems seem to come with guys snapping those pins or knocking valve train loose. Excellent torque and decent hp gains throughout all revs, stone cold reliable and no other mods needed to get it to work.
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SSurfer
Dodge Dakota
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11/11/2003
20:44:00
| RE: HO cams and Intake
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After the cams and HO manifold I honestly did not feel any noticeable gains, I am hoping after a pcm flash once the computer knows what lift and duration the cams are producing the 4.7 will use them to thier full potential.
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Kowalski
Dodge Dakota
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11/12/2003
16:44:48
| RE: HO cams and Intake
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I'm surprised, I didn't find one to be dependant on the other. Saw a nice torque gain with just the cams, went from just squeeling the tires to being able to light them right up. Then saw another nice gain with the flash. I didn't change the manifold though, I think that might trade some low end power for high end.
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clok.nem
Dodge Dakota
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11/12/2003
16:53:45
| RE: HO cams and Intake
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I installed the cams only a couple weeks ago. The irritances I ran into were getting "stuff" out the way ( wires, rails, a/c lines) of the valve covers. Be careful with either breather tube, I snapped one. You definitely need the wedge tool. Otherwise the install went pretty easy. I think its made a difference in power and sound.
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TheDonNonn
Dodge Dakota
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11/13/2003
21:24:40
| RE: HO cams and Intake
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Make sure you dont rotate the engine the slightest little bit during the install...somehow that happened to me. And well, $3000 later I'm back where I started, only this time I have brand new stock heads.
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cloknem
Dodge Dakota
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11/14/2003
15:37:20
| RE: HO cams and Intake
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I did slip the engine while torqueing the left cam. I guess the wedge tool slipped. But I cycled the engine back to TDC and proceeded. Whew! I haven't had any problems.
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CThomp
*GenIII*
11/14/2003
16:08:16
| RE: HO cams and Intake
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What do you mean by rotate the engine? I think I would have bought some KRC heads had I ruined my stock ones.
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cloknem
Dodge Dakota
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11/14/2003
17:45:44
| RE: HO cams and Intake
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I hit the starter until the engine came back to TDC.
2001 Dodge Truck Dakota Quad Cab 2WD V8-287 4.7L SOHC VIN N SFI
Top - Vehicle
Engine, Cooling and Exhaust
. Engine
. . Camshaft
. . . Service and Repair
. . . . Left Camshaft
.
Notes
Left Camshaft
REMOVAL
CAUTION: When the timing chain is removed and the cylinder heads are still installed, DO NOT forcefully rotate the camshafts or crankshaft Independently of each other. Severe valve and/or piston damage can occur.
CAUTION: When removing the cam sprocket, timing chains or camshaft, Failure to use Special Tool 8350 will result in hydraulic tensioner ratchet over extension, requiring timing chain cover removal to reset the tensioner ratchet.
Remove cylinder head cover.
Set engine to TDC cylinder #1, camshaft sprocket V8 marks at the 12 o'clock position.
Mark one link on the secondary timing chain on both sides of the V8 mark on the camshaft sprocket to aid in installation. CAUTION: Do not hold or pry on the camshaft target wheel (Located on the right side camshaft sprocket) for any reason, Severe damage will occur to the target wheel resulting in a vehicle no start condition.
Loosen but DO NOT remove the camshaft sprocket retaining bolt. Leave the bolt snug against the sprocket. NOTE: The timing chain tensioners must be secured prior to removing the camshaft sprockets. Failure to secure tensioners will allow the tensioners to extend, requiring timing chain cover removal in order to reset tensioners. CAUTION: Do not force wedge past the narrowest point between the chain strands. Damage to the tensioners may occur.
Position Special Tool 8350 timing chain wedge between the timing chain strands, tap the tool to securely wedge the timing chain against the tensioner arm and guide (Fig. 28). NOTE: When gripping the camshaft, place the pliers on the tube portion of the camshaft only. Do not grip the lobes or the sprocket areas.
Hold the camshaft with adjustable pliers while removing the camshaft sprocket bolt and sprocket (Fig. 29).
Using the pliers, gently allow the camshaft to rotate 150 clockwise until the camshaft is in the neutral position (no valve load).
Starting at the outside working inward, loosen the camshaft bearing cap retaining bolts 1/2 turn at a time. Repeat until all load is off the bearing caps. CAUTION: DO NOT STAMP OR STRIKE THE CAMSHAFT BEARING CAPS. SEVERE DAMAGE WILL OCCUR TO THE BEARING CAPS. NOTE: When the camshaft is removed the rocker arms may slide downward, mark the rocker arms before removing camshaft.
Remove the camshaft bearing caps and the camshaft.
INSTALLATION
Lubricate camshaft journals with clean engine oil. NOTE: Position the left side camshaft so that the camshaft sprocket dowel is near the 1 o'clock position, This will place the camshaft at the neutral position easing the installation of the camshaft bearing caps.
Position the camshaft into the cylinder head.
Install the camshaft bearing caps, hand tighten the retaining bolts.
Camshaft Bearing Caps - Left Side
Working in 1/2 turn increments, tighten the bearing cap retaining bolts starting with the middle cap working outward (Fig. 30).
Torque the camshaft bearing cap retaining bolts to 11 Nm (100 in. lbs.) .
Position the camshaft drive gear into the timing chain aligning the V8 mark between the two marked chain links (Two links marked during removal) (Fig. 31). NOTE: When gripping the camshaft, place the pliers on the tube portion of the camshaft only. Do not grip the lobes or the sprocket areas.
Using the adjustable pliers, rotate the camshaft until the camshaft sprocket dowel is aligned with the slot in the camshaft sprocket. Install the sprocket onto the camshaft (Fig. 32). CAUTION: Remove excess oil from camshaft sprocket bolt. Failure to do so can cause bolt over torque resulting in bolt failure.
Remove excess oil from bolt, then install the camshaft sprocket retaining bolt and hand tighten.
Remove Special Tool 8350 timing chain wedge (Fig. 33).
Using Special Tool 6958 spanner wrench with adapter pins 8346 (Fig. 34), torque the camshaft sprocket retaining bolt to 122 Nm (90 ft. lbs.).
Install the cylinder head cover.
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