HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
fsae_2011

cam shaft slip?

5 posts in this topic

Greetings,

I am from the Virginia Tech Formula SAE team and we are currently troubleshooting our 2004 WR450 engine. We didn't have any issues while dyno tuning however upon trying to start the engine once it was installed in the car we ran into issue with intake backfires that we hadn't seen in the dyno. The engine also kept getting stuck on the compression stroke as if the auto decompress wasn't working.

The attached photo is of our cams and we are wondering if there is a chance that one of them has slipped as the lobes appear to not be 180 deg from each other. Please let me know your opinions.

20110411211352246.jpg

Share this post


Link to post
Share on other sites
The engine also kept getting stuck on the compression stroke as if the auto decompress wasn't working.

The valve may be hitting the piston.

Looks like the cam sprocket may have slipped on the camshaft.

Share this post


Link to post
Share on other sites

On the opposite side w/ the gears, the two dots one on each gear should be facing each other to the flat surface where the valve cover rests. You will need to turn the crank down by the stator (take out the threaded plugs) to line up the timing marks to get the piston to TDC.

Share this post


Link to post
Share on other sites

Subscribed, Im seeing what some VT students can come up with

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0