Double Rollmaster Install

[GTPpower]

Any trick to getting this thing on all the way?

This is as far as it wants to go. It feels like the cam is slightly too big.

Click to read more...

 

[1quick]

Did you test fit it with the chain off first?

 

[Turbocharged400sbc]

the cam snout dia is slightly larger as you get closer to the cams thrust plate step.

also when they cut the keyways it leads to a good bit of deformation of the cam and crank gear ID bore so youll want to spend a bit of time with crocus cloth or small files. its more than enough to put TIR over .003

also lots of burrs in the tooth area that would be good to knock down wth a mini file to prevent sending that trash through the motor/pump and wear the chain faster.

its like 74ftlbs plus 90* iirc
for the 90* turn i mark the bolt and gear 90* apart (middle of cam bolt flat to the corner adjacent), mark my impact socket then i use my impact to hammer it over the 90* while holding the chain/cam gear with my other hand to try and dampen the hammering the chain see's

it also keeps you from shearing/walking the cam's keyway over as most lock the crank then tighten by hand wich can move the gear on the cam

 

[GTPpower]

Ok. At least nothing is screwed up. I tried it with the stock sprocket and cam, and this is about as far as it would go too.

I was thinking of just hitting it with some emery cloth.

I didn't look too closely at the tooth area, but I will make sure to check that and clean it up tonight....good idea.

Thanks for the help.

 

[Turbocharged400sbc]

hit the edges of the keyway heavy with a file where it mates to the ID bore

the bore deforms about a 1/16th to each side of the keyway notch

 

[GTPpower]

Will do man. Thanks.

 

[Turbocharged400sbc]

for moar info:
http://www.thechicagogarage.com/forum/3800-discussion/56680-james-step.html

i really should have a thread listing of all my rambling

 

[Handsome Jesus]

James's dirty/sticky thread should be created at the top of 3800 section.

 

[GTPpower]

No kidding.

 

[GTPpower]

Where the hell did you find a file small enough to debur the inner radius of the teeth?

 

[Turbocharged400sbc]

its called a needle file, you can get a whole set of triangle,square, tapered, round, half round profiles for a few bucks at most parts/tool joints

files are about 4-6" long with 1/8th inch shanks

 

[ProjectGTP]

Maybe a stupid question, but you know the cam moves forward and backward a little without the cam sprocket bolted on right? Try putting the cam bolt on like 4 threads and pulling it out while pushing on the sprocket. Just a thought.

 

[GTPpower]

its called a needle file, you can get a whole set of triangle,square, tapered, round, half round profiles for a few bucks at most parts/tool joints

files are about 4-6" long with 1/8th inch shanks

Hmmmm. Ok. I'm going to swing by Menards tonight or tomorrow and see if they have one.

 

[GTPpower]

Maybe a stupid question, but you know the cam moves forward and backward a little without the cam sprocket bolted on right? Try putting the cam bolt on like 4 threads and pulling it out while pushing on the sprocket. Just a thought.

It wouldn't go. I took a picture with my good camera that shows what the problem was....not sure if it had something to do with this cam having a JP timing set on it for 30k miles. But, I had to use a file on it.

 

[ProjectGTP]

Oh wow. Well hopefully everything goes well after you file it down.

 

[GTPpower]

Yeah, it looks like it'll work fine now.

 

[Turbocharged400sbc]

i dont see a pic but im gonna guess the keyway stretched in the came nose?

its one reason i like to use the impact method

even durring the inital 74ftlb tqing people will hold the crank still and the gear will spin just enough to tilt the key over and mushroom the slot

 

[Turbocharged400sbc]

make sure you use taped up pliers to make sure the keyway is seated fully in the slot otherwise you can could be a hair off

 

[GTPpower]

i dont see a pic but im gonna guess the keyway stretched in the came nose?

its one reason i like to use the impact method

even durring the inital 74ftlb tqing people will hold the crank still and the gear will spin just enough to tilt the key over and mushroom the slot

I'll have to grab it off my camera...forgot it at my shop.

The gear caused the cam snout to "mushroom"....I'm not sure how well the picture will be able to show it, but I could easily feel it with my fingernail.

 

[GTPpower]

make sure you use taped up pliers to make sure the keyway is seated fully in the slot otherwise you can could be a hair off

I've always stuck the cam snout on the end of a table, and tapped the key into the cam with a hammer...maybe I shouldn't do that?

 

[Turbocharged400sbc]

that works fine as long as it's wood/etc to keep from marring the surface

if the car owner is around and watching/helping....grab your biggest hammer :trollface:

 

[GTPpower]

Haha!

 

[Turbocharged400sbc]

oh and for those of you reading this in the future....

as soon as you pull the timing or rear cover off, carefully spray a rag with brake clean and wipe around the oil galley hole and oil pickup hole (wipe away fromt he holes!) and tape over em (you can tape directly to the gasket remnants temporarily)

it'll help keep all the crap outta them as you scrape gaskets/etc.

once you get it so no debris can fall into the holes, then pop off the tape and scrape the gasket around them making sure to keep it out of there, use a piece of notebook paper to fish/sweep out any bits of gasket/grit, wipe the block face once more with brake cleaner then tape over it one last time (you can be cool and cut a circle around it then peel the excess tape away)

once its all ready to go tofether and your ready to install the gasket/cover just peel em off and slide the gasket on and enjoy the peace of mind from not lunching bearings

i tend to keep the motors cleaner than i do myself...but thats cause i love em more

 

[GTPpower]

I like to poop in those holes.

 

[Turbocharged400sbc]

:hahano: