Thread: New double roller installed

We are installing a new cam and with it a double roller chain. We got the new cam installed but with the timing chain we ran into some issues.
A spacer came with the chain and if we put it on the crankshaft the chain is not straight at all and wont roll smooth. Are we missing a step? Also the chain tensioner isnt made for a double chain is there a new one I will have to buy for the extra width?

Last question I got, the front cover isnt going on all the way I never read about having to get a new one, we checked everything over its just not wanting to go on straight can anyone help??
May not be the correct topic area but its for a turbo build.

For the cover you'll need to stack gaskets or machine it.

From zzp:

The single row set is a direct drop in replacement for the factory timing set. Simply remove the factory crank and cam sprockets, with the chain, transfer the cam positioner magnet from the factory cam sprocket to the new roller sprocket, and install the new timing set.

To run the *double roller, the balance shaft gear must be removed. To save additional weight the balance shaft can removed altogether but this requires plugging the rear oiling hole. The Rollmaster has a much tighter fit, so the timing chain tensioner is no longer used.

Double chain sets are required for engines running valve springs higher than 105 pound.

*Due to potential front cover clearance issues on some cars, we recommend running (2) front cover gaskets -or- (1) ZZP garlock front cover gasket and our machined oil pump cover when installing the double roller.
The Cam position sensor magnet pushes in from the backside in the hole that is recessed.

Theres threads about installing a double roller. They say you need to remove certain parts, and that you need a new machined oil pump cover.

Thanks guys I got the machined oil pump and the gasket ill just have to work it in there thanks a lot.

Originally Posted by BillBoost37

Make sure you have the chamfer on the back of the crank gear corrected at a minimum.

The fact that they still sell it like this bothers the crap out of me.

take the rollmaster double roller crank gear to the machine shop with the stock crank gear and have them match the camfer of the stock crank gear.

Originally Posted by Reptile

The fact that they still sell it like this bothers the crap out of me.

They sell it like that because an Australian company makes the double roller and it's correct for the Ausssie 3800
Obviously not worth the time and money to them to sell a U.S. Version.

Originally Posted by 231FUN

They sell it like that because an Australian company makes the double roller and it's correct for the Ausssie 3800
Obviously not worth the time and money to them to sell a U.S. Version.

it would take so little effort for them to correct the problem with the camfer.

Originally Posted by 231FUN

They sell it like that because an Australian company makes the double roller and it's correct for the Ausssie 3800
Obviously not worth the time and money to them to sell a U.S. Version.

I'm aware of that....I'm saying that when zzp sells them, they should be sold so that you don't have to modify them more to make it right.
I figured this out close to 8 years ago, after my crank gear split in half.
It takes 5 minutes to machine them, there's no reason for it IMO.

Originally Posted by Reptile

I'm aware of that....I'm saying that when zzp sells them, they should be sold so that you don't have to modify them more to make it right.
I figured this out close to 8 years ago, after my crank gear split in half.
It takes 5 minutes to machine them, there's no reason for it IMO.

Yeah I figured you were... Obviously not worth the time and money for zzp to do it either,people keep buying them as is.

This is what could happen if you don't machine the gear like it NEEDS to be...The only thing that held it together was the oil pump. I drove it home 40 miles like this, and it's a wonder that I didn't lose an engine. Made a LOT of noise.



This is with a machined cover, and double gasket. It'll still rub...

LOL....I honestly don't remember.
Most of it was crap that I won't eat anyway, we've moved on to summer grilling/smoking now. I've got my own for those.

Originally Posted by coolone

This is candidate for the LIKE button!

lol...

what bothers me even more is someone modding without doing all the necessary research first! There's got to be hundreds of links including YouTube vids on the DOUBLE ROLLER add to a 3800. So come on!... Really?

sorry OP, but you deserve it!

Im fine with you being angered over me not looking it up but I feel I get more info out of experiences from others than a youtube video that can br less informative on what needs to be done.

Im out of state now but it seems like I will have to have something machined??? Ill have to look for someone around me to machine it.