BC Cam issue
- Thread starter BLACKCAT
- Start date
I've seen camshafts break like this, and it's usually due to user error. Improper removal or installation.
Broke as I was doing the final tightening sequence (3rd last bolt), as per repair manual order & torque, whilst adjusting shim sizes 
(measured shim clearance, removed cam, adjusted some shims & proceeded to re-install cam).
Have used the same procedure on many stock 7M Toyota cams without any issues.
(measured shim clearance, removed cam, adjusted some shims & proceeded to re-install cam).
Have used the same procedure on many stock 7M Toyota cams without any issues.
BLACKCAT;2033722 said:
Just so you know, this does not validate your claim from a logic point of view. I know it is money lost, but you are not the first to break a camshaft.
Seen many threads like this with many different cam companies. It's usually because of how it was tightened down. Big cams and stronger valve springs don't help either.
Nick M;2033733 said:
Yeah, but it does suck when you follow the directions per TSRM and it snaps. If I did all I could correctly on my part, then I'd be on the phone calling BC. No company puts out 100% top quality parts. There will be some defects, casting flaws, forging imperfections from time to time. Just explain what happened, and see what they tell you. They just might help you, give you another at cost, or laugh at you and tell you to jump in the lake. You never know.
Ive owned many sets of BC cams. None have done that. One set came in cracked (both I and BC agreed probably dropped during shipping) but they warrantied it no hassle. BC is a good company. Call them and see what they say.
Have emailed them to see what they say.
Bought & installed stock 7MGTE cams today & set at 0,0 on the adjustable gears.
Strangely it only pulls 16" vacuum at idle, thought it would be more, and my tune would be all over the place as it was specific to the BC264 cams which had more lift & duration.
http://s156.photobucket.com/user/toyotasucks/media/ecu.jpg.html
Ignore the A/F ratio as I have no wideband fitted.
Anyone played with the stock cam settings to obtain more power in the mid-top range?
On the Suprastore website they state: "Start the cam gear setting with +3 degrees advanced and -1 degree retarded."
I assume they mean +3 on the exhaust.
The cams have a total of 9 degrees overlap so with these adjustments nearly at that is wiped out which means the cylinder pressure would be greatly increased.
Bought & installed stock 7MGTE cams today & set at 0,0 on the adjustable gears.
Strangely it only pulls 16" vacuum at idle, thought it would be more, and my tune would be all over the place as it was specific to the BC264 cams which had more lift & duration.
http://s156.photobucket.com/user/toyotasucks/media/ecu.jpg.html
Ignore the A/F ratio as I have no wideband fitted.
Anyone played with the stock cam settings to obtain more power in the mid-top range?
On the Suprastore website they state: "Start the cam gear setting with +3 degrees advanced and -1 degree retarded."
I assume they mean +3 on the exhaust.
The cams have a total of 9 degrees overlap so with these adjustments nearly at that is wiped out which means the cylinder pressure would be greatly increased.
Last edited:
BLACKCAT;2033822 said:
It has been done. Don't forget, the big support for these cars is 20 plus years past. The gains were not huge (not my car) but they exist.
