Diagnosis for scored cam lobe

[LAllison20]

It is closer to 77k I guess

 

[Bobby]

For starters, how many miles are on this engine? Springs get weaker over time.

because you have extra pressure in the cylinder when the valve is opening the pressure is trying to close it back. that is why you need a stiffer spring. just makes it easier to hold open the valve. i have the same problem with bbr regrinds. i just never really said anything, but i think it is the regrind cams. i broke a valve when it happened and lost 2 pistons.

 

[vinnybarber]

because you have extra pressure in the cylinder when the valve is opening the pressure is trying to close it back. that is why you need a stiffer spring. just makes it easier to hold open the valve. i have the same problem with bbr regrinds. i just never really said anything, but i think it is the regrind cams. i broke a valve when it happened and lost 2 pistons.

you are on the right path. springs are over looked alot.
everyone keeps turning up there power a little at a time.

 

[Greg Hazlett]

The stock cams are in there, the regrind are long gone....they have been out for at least 6 months and his car is a DD.

 

[LAllison20]

Changing valve springs seems to be a little beyond my expertise w/o removing the cylinder head, I don't really want to remove the head

Besides that, The ticking noise seems to be coming from the end of the oil pan/ trans area, not from the head. What could that be from?

 

[Bobby]

spun rod bearing

 

[Greg Hazlett]

We were talking about that; would there be any other indicators? He just did an oil change 2-3 weeks ago and no sign of metals....would there be a drop in performance? Would a compression test verify that?

 

[JEWC_Motorsports]

Manual oil pressure gauge might show a drop in oil pressure. I would think a spun rod bearing would knock, not tick.

 

[Bobby]

i have heard both do you hear it all the time. i hear a tick when i go to take off but it is my twin disk clutch. not sure what you can do to make sure. take it to and engine builder and have the listen to it.

 

[TurboX]

because you have extra pressure in the cylinder when the valve is opening the pressure is trying to close it back. that is why you need a stiffer spring. just makes it easier to hold open the valve. i have the same problem with bbr regrinds. i just never really said anything, but i think it is the regrind cams. i broke a valve when it happened and lost 2 pistons.

Bobby is this on your new motor or a previous combo ?

 

[white05gt]

We were talking about that; would there be any other indicators? He just did an oil change 2-3 weeks ago and no sign of metals....would there be a drop in performance? Would a compression test verify that?

Did you cut apart the oil filter to verify no metal?

 

[Greg Hazlett]

Did you cut apart the oil filter to verify no metal?

That one I can't answer for sure since Luke did the oil change at his house but I am 99% sure he did not cut open the oil filter.

 

[white05gt]

It's a good idea when experiencing any kind of problems or concerns to get a filter cutting tool from summit and cut open the filter to inspect. It's a cheap way of catching something before it turns into something major.

 

[Bobby]

Bobby is this on your new motor or a previous combo ?

it was my old motor that is why i had to build the new motor.

 

[Greg Hazlett]

It's a good idea when experiencing any kind of problems or concerns to get a filter cutting tool from summit and cut open the filter to inspect. It's a cheap way of catching something before it turns into something major.

Good call and makes sense, hopefully Luke see's this and next oil change he does this.

 

[LAllison20]

Yeah, ill have to look in to one if those, considering the last time we tried to cut open my oil filter it didn't turn out well

 

[Greg Hazlett]

Yeah...about that....

 

[Mustang30212]

Greg,

I have some stock cams out of my 05 if it comes to that.

RH

 

[Greg Hazlett]

Thanks; we buttoned it back up after installing a couple of new lash adjusters/followers and after listening to the car running it sounds as if the tick is coming from the oil pan/tranny housing which is a lot more involved with just a cam swap...gulp.


Did you receive my last PM about the stock 3V?

 

[Mustang30212]

Did you receive my last PM about the stock 3V?

Don't think so.

RH