Cam button?
- Thread starter davidf
- Start date
Melling Automotive Products sells a roller cam button- p/n: "CB100". I think I bought it at O'Reilly's. The dealer was taking forever getting it in so I went to O'Reilly's and they had it the next day. I finally got the one that I ordered from the dealer and and it was the same as the Melling.
I'm about to pull the TC for a double roller install. Is there a fact. cambutton in there? {original timiing gear} Do I need to install one? I have'nt seen any vendors listing them.Thanks
Make sure you don't run the stock tensioner, it will end up in your oil pan
HTH
Prasad
Make sure you don't run the stock tensioner, it will end up in your oil pan
HTH
Prasad
+1:frown:.........I learned about this the hard way.
3.8L V-8 eater
Well-Known Member
- Joined
- Jul 22, 2006
Make sure you don't run the stock tensioner, it will end up in your oil pan
HTH
Prasad
Could you please explain this??
A tensioner is not needed with a double roller timing chain. The chain is tight enough without one. Using a tensioner keeps the tensioner spring taunt all the time. I bought an engine years ago and I found this out after the tensioner broke, got in the timing chain's teeth, jumped time, valves got bent when they hit the piston. It cost to repair everything. :frown:
Very good to know.
Well, it’s a little complicated to explain but I will try to explain it. If I confuse you more then I apologize in advance.
From what I have seen, the stock chain is a single, meaning just like a bike chain, the construction of the each link is; you have the middle part that rides on the teeth/sprocket which is held together by there two side plates for each link. Now on a double roller since they are double links in width, each link takes three plates or connectors. (Two on the outer edges and one in the middle) That extra plate or connector in the middle of the link will cut into the plastic/nylon part of the stock tensioner since it was not designed to be used with a double roller links thus forms a groove in the middle of the plastic/nylon tensioner. Eventually weakens it and at the end it crumbles and breaks off. It may end up any where and every where possible.
I have seen tensioners for double roller chains for “Big Dollar” build engines and I am sure it’s big dollars if you must have one. I have been running them without the tensioners for years. Now I have seen plenty of worn down double rollers too with a lot of chain slap too. So if you going to spend the money buy a good brand chain that is not going wear down quickly. No Chinese crap.
I am just a hobbyist so take it with caution.
HTH
Prasad
dr_frankenstein
Mad Scientist
- Joined
- Mar 17, 2008
where are you guys getting the aftermarket buttons? I want something other than the spring and plastic stock one.
and which are you using?
A.j.
and which are you using?
A.j.
A.j. The Melling (CB100) that I listed above is a rollerized cam buttom not plastic like the orginial, even the button that I got from the dealer was rollerized. What ever parts store that sells Melling automotive products; Napa, O'Reillys, Autozone, etc will be able get you one.
dr_frankenstein
Mad Scientist
- Joined
- Mar 17, 2008
I'm looking at roller cam buttons as well for the stock flat tappet cam. I found two possibilities from Cloyes. Is the one listed for the FWD a better design and the one we want? Cause the one they list for the GN looks like the one for sale on fullthrottlespeed.com. So I'm a little confused on which is the correct one.
Thanks for any feedback!
9-5190 for 1988 Buick Electra Park Avenue
9-5189 for 1987 Buick Regal Grand National
Thanks for any feedback!
9-5190 for 1988 Buick Electra Park Avenue
9-5189 for 1987 Buick Regal Grand National
