|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
03-20-2014, 10:52 AM | #21 |
Senior Member
Join Date: May 2010
Location: Cincinnati, OH
Posts: 209
|
Re: Tappet noise with new cam
Right. The question is how much damage and if it's toast now. Got a few hundred miles on it. I'll know hopefully this weekend.
|
03-20-2014, 10:54 AM | #22 |
Senior Member
Join Date: May 2010
Location: Cincinnati, OH
Posts: 209
|
Re: Tappet noise with new cam
Right. The question is how much damage and if the cam is now toast. Hopefully I'll know this weekend.
|
Sponsored Links (Register now to hide all advertisements) |
|
05-26-2014, 03:36 PM | #23 |
Senior Member
Join Date: May 2010
Location: Cincinnati, OH
Posts: 209
|
Re: Tappet noise with new cam
Pulled out the cam today; wear rate is visually very high considering there is less than 1000 miles on this engine, and is concentrated in one spot on the lobe. I can't measure a height difference with a micrometer, but the lobe is certainly rounded where it has been scraping the edge of the lifter. Maybe the larger diameter single lock lifter will bridge over this worn area and get enough support from the unworn edges to be okay. Would sure beat buying a new $400 cam. Wish I had known about the necessity of using a specific lifter before installing the cam.
I removed this with the engine in the car but I'll take Purdy's sage advice next time and pull the motor out. |
05-26-2014, 05:14 PM | #24 | |
Senior Member
Join Date: May 2010
Location: NC
Posts: 2,975
|
Re: Tappet noise with new cam
Quote:
You should call Bill and ask him. If it is to bad he can regrind it for you. Bill is a good guy he will tell you what to do. |
|
05-26-2014, 05:55 PM | #25 |
Senior Member
Join Date: May 2010
Location: Santa Rosa, CA
Posts: 1,279
|
Re: Tappet noise with new cam
Yep, those are exactly the same marks I had on my cam using the small lifters. The center gouge may well have worn through the outer hardening, or certainly reduced its depth, so it would not last long even with correct lifters. It should be re-hardened if it is reground. The instructions should have told you the size lifters to use. Be sure the lifters rotate when you reinstall them.
|
05-26-2014, 07:00 PM | #26 |
Senior Member
Join Date: May 2010
Location: Wa.
Posts: 5,409
|
Re: Tappet noise with new cam
Sponsored Links (Register now to hide all advertisements)
Aside from that, the finish on the unworn part of the lobe looks like it was done on a bench grinder. I'm surprised Bill would let something like that out. |
05-26-2014, 07:27 PM | #27 |
Senior Member
Join Date: May 2010
Location: Alabama
Posts: 8,099
|
Re: Tappet noise with new cam
I've always used the single lock lifters . Bill Told me to use the large base single lock lifters when I ordered my cam. Mine is a 3/4 race regrind but the large base lifters are really better for any cam if you expect to get full specs on duration.
|
05-26-2014, 07:36 PM | #28 |
Senior Member
Join Date: May 2010
Location: Wa.
Posts: 5,409
|
Re: Tappet noise with new cam
"but the large base lifters are really better for any cam if you expect to get full specs on duration."
Wrong! If the cam is designed for a 1 inch lifter, increasing the face diameter will only add weight to the valve train. |
05-27-2014, 01:09 AM | #29 |
Senior Member
Join Date: Mar 2013
Location: Australa Melbourne
Posts: 878
|
Re: Tappet noise with new cam
Send it back to Bill as to be checked
Ask him to supply correct lifters and valve springs to suit the cam Remember different cams need different valve springs Last edited by colin1928; 05-27-2014 at 02:33 AM. Reason: add |
05-27-2014, 10:06 AM | #30 |
BANNED
Join Date: May 2012
Location: inside your RAM
Posts: 3,134
|
Re: Tappet noise with new cam
"Aside from that, the finish on the unworn part of the lobe looks like it was done on a bench grinder. I'm surprised Bill would let something like that out."
Hmmm. Look closely. The copper plating is nearly gone. Wonder if the cam also overheated....that would throw off the appearance of any of the rest of the surfaces.
__________________
'31 180A |
05-27-2014, 10:27 AM | #31 | |
Senior Member
Join Date: May 2010
Location: Wa.
Posts: 5,409
|
Re: Tappet noise with new cam
Quote:
It has not been overheated. |
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|