Those of you with double roller timing chains....
- Thread starter Reptile
- Start date
Kejross
New member
Been in bed not feeling well all morning, now I gotta make my way to work. I'll get pics and measurements tonight when I get off work. I just thought the RM's had single piece crank gears?
SuperchargedFiero
New member
As far as I know its a rollmaster from ZZperformance And the box has not been opened as far as I could see.
And I measured it again with the right tools and the rollmaster was 0.0200 mm smaller than the crank and the stock chain hub ( how do I call it ) the one that goes over the crank was 0.0400 bigger
I machined the crank and the rollmaster hub to get the angle right ,because it was not right . Did not got time to install the crank back in the engine and see if the chain runs free from the crank and that it line's up with the cam
Here are some pic's so far.
bevore
after
tomorrow i will install it hope it will work .
And I measured it again with the right tools and the rollmaster was 0.0200 mm smaller than the crank and the stock chain hub ( how do I call it ) the one that goes over the crank was 0.0400 bigger
I machined the crank and the rollmaster hub to get the angle right ,because it was not right . Did not got time to install the crank back in the engine and see if the chain runs free from the crank and that it line's up with the cam
Here are some pic's so far.
bevore
after
tomorrow i will install it hope it will work .
SuperchargedFiero
New member
blueguy
The Blue One
They do.
If it was used I wonder if someone sold him a JP gear with a RM chain...as I thought they were different chains. Maybe not, oh well. Never seen a JP in person...just dealt with a few RM doubles, RM singles, and stockers...
SuperchargedFiero
New member
I wished I had that luck
Kejross
New member
Don't feel bad it was just a hangover. I measured my chain and got .9228 from the widest part, the pin holding the links together.
He said ZZP so...
How mine fit too, perfect without modding anything but pump cover.
MrPoopyButthole
#Billsnamechangessuck
I have a Rollermaster I got for $80, still debating if I really need it.
Last edited:
BillBoost37
New member
Cool, that needed chamfer is exactly what most others have found. Once you put it back together, I'd expect that the chain won't hit the pump cover.
Dave..bring the set with you to the RI meet and I'll drop it at the machine shop.
Dave..bring the set with you to the RI meet and I'll drop it at the machine shop.
Kejross
New member
Just noticed but why the hell does the box say "ecotec" and "except supercharged engine"???
SuperchargedFiero
New member
BillBoost37
New member
Ask an Aussie what our motors are calling over there. I bet it's called an Ecotec. On the non-sc part...you got me as well.
FoSHO99
youtu.be/xhrBDcQq2DM
3.8 Litre (Ecotec) Commodore VS
Commodore VT
Commodore VX
Commodore VY
Statesman VS
Statesman WH
Then there is the regular 3.8...
3.8 Litre Commodore VN
Commodore VP
Commodore VR
Statesman VQ
Statesman VR
The commodore VT, VX, VY came supercharged so I'm guessing Holdens ecotec 3.8L is meaning supercharged.
There may be no differences between the n/a 3.8l and s/c 3.8l versions, sometimes they mark up prices on that stuff and the n/a version is always cheaper, like head gaskets.
Commodore VT
Commodore VX
Commodore VY
Statesman VS
Statesman WH
Then there is the regular 3.8...
3.8 Litre Commodore VN
Commodore VP
Commodore VR
Statesman VQ
Statesman VR
The commodore VT, VX, VY came supercharged so I'm guessing Holdens ecotec 3.8L is meaning supercharged.
There may be no differences between the n/a 3.8l and s/c 3.8l versions, sometimes they mark up prices on that stuff and the n/a version is always cheaper, like head gaskets.
Last edited:
SuperchargedFiero
New member
FoSHO99
youtu.be/xhrBDcQq2DM
SuperchargedFiero
New member
Ok install the crank to see if it all fits and as u can see now i got 2 MM space between the crank and chain ,so much better than bevore
Now i am only concerned about the oil pump cover
as i showed in a pic bevore i narrowed the oil cover by 0.20 MM and not 0.020 MM
:th_lightbulb::th_laugh-pointup: hahahahhahahaha and now i understand ,it was inches and not MM
and 0.020 inches is 0.51 MM
Without a gasket it hits the oil cover and i measuted the space it needs and that is 0.40 mm 0.0157 inch
i will take 1 MM 0.0394 inch just to be sure
with a 1 gasket it sits free but i think its to close
here u can see that the chain is not equal from the engine ,but it is like 0.065 mm 0.0256 inches ,I dont think i need to worry about that
Now i am only concerned about the oil pump cover
as i showed in a pic bevore i narrowed the oil cover by 0.20 MM and not 0.020 MM
:th_lightbulb::th_laugh-pointup: hahahahhahahaha and now i understand ,it was inches and not MM
and 0.020 inches is 0.51 MM
Without a gasket it hits the oil cover and i measuted the space it needs and that is 0.40 mm 0.0157 inch
i will take 1 MM 0.0394 inch just to be sure
with a 1 gasket it sits free but i think its to close
here u can see that the chain is not equal from the engine ,but it is like 0.065 mm 0.0256 inches ,I dont think i need to worry about that
BillBoost37
New member
I know in Matt (Janices) machining, he'd also end up needing to machine about .01" off the cam gear. Wonder if he was taking the crank gear back a little further. I know that after doing it..there was no need to machine the oil pump cover as it would then fit and clear.
SuperchargedFiero
New member
i will take some of from the cover and see from there
Kejross
New member
I'm not trying to rub it in or anything but mine fits perfect, first try, even without a single gasket... I checked chain to crank clearance and it looks about like yours AFTER you machined the crank. Just gonna take a touch more off the tops of the two screws in the oil pump cover to play it safe and still probably double gasket it since it won't hurt anything.
