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Check this out. Curious question??

- - - - - #cams#camdowels

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24 replies to this topic

#1
Tim

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Has anybody ever received a cam from a manufacturer,looking like this

Look at the cam dowls

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post-273-0-31146100-1438786356.jpg

#2
BAZ007

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These were used or new?

#3
Tim

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These were used or new?

These were new when they went in, is my understanding


post-273-0-31146100-1438786356.jpg

#4
BAZ007

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It clearly looks scuffed/rubbed against something. Also the ring the dowl is in seems not uniform and somewhat eroded!?

I'll let the pros chime in

#5
Tim

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Looks welded and sanded..look at the burn marks on it


post-273-0-31146100-1438786356.jpg

#6
BAZ007

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Looks welded and sanded..look at the burn marks on it

 

Fucking spot on, wtf is this.

 

You dont need that or even want it on your beast. Are these Tomies?


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#7
elf_cruiser

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Definitely a couple of tack welds on that dowel. I have no idea if that's normal or acceptable...
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#8
BAZ007

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Last thing anyone would want is a piece of a camshaft shoots through the heads on a 1000WHP+ GTR at 8000RPM!


Edited by BAZ007, 16 February 2017 - 10:08 PM.


#9
Tim

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Fucking spot on, wtf is this.

 

You dont need that or even want it on your beast. Are these Tomies?

Not 100% on who made them but to my understanding all the cam blanks are made by the same company ,then ground to each company's specs


post-273-0-31146100-1438786356.jpg

#10
Doug@WGP

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Looks to me like what happened there is some idiot used an impact gun to install the cam sprockets and broke the dowel pin /end of the cam off... and then tried to weld that part back together.

I've actually seen this once before on one of the hack jobs we repaired.
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Doug Ross
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#11
Carmiwrx

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Looks out of round, too.
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#12
Ian201

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Hell if those two tack welds crack you could be up shit creek. Doesn`t even look as though there is any weld penetration,only two tacks on the surface yikes!!!  What a botch job and what was the guy that did this thinking ? The consequences ?


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#13
tg07

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Are you able to share any more details on this?  You noted that they were new when they went in...Who's car?  Who put them in (shop?)?  If it was a shop, I wouldn't let them touch my car after seeing that.


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#14
Tim

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Are you able to share any more details on this?  You noted that they were new when they went in...Who's car?  Who put them in (shop?)?  If it was a shop, I wouldn't let them touch my car after seeing that.

It was on a group chat I'm in and the guy didn't want to say the shop name.   I agree with the others statements and yours .i would be pissed


post-273-0-31146100-1438786356.jpg

#15
Tim

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Looks to me like what happened there is some idiot used an impact gun to install the cam sprockets and broke the dowel pin /end of the cam off... and then tried to weld that part back together.

I've actually seen this once before on one of the hack jobs we repaired.

Doug i will pass that on as to thats what could of happened.   Ive also heard that it happen's on initial start up.


post-273-0-31146100-1438786356.jpg

#16
Doug@WGP

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what brand are the cams? I've seen this happen twice, once on an oem cam on removal and once on a set of kelfords that I think had a weak casting... (the lobes had little chips flaking off of them too)
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Doug Ross
Owner of Weapons Grade Performance
-Northeast/Pacific Northwest Shops where we ONLY work on GT-Rs
-Owner/Builder of the 1st Ever Home Garage GT-R Drivetrain Removal
Cobb Protuner / EcuTek Tuner
-All Wheel Drive Mustang Dyno in House
doug@weaponsgradeperformance.com
Our Online Store
East Coast Location 226 N. Plains Industrial Rd, Wallingford CT 06492 203-668-4765


#17
Tim

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what brand are the cams? I've seen this happen twice, once on an oem cam on removal and once on a set of kelfords that I think had a weak casting... (the lobes had little chips flaking off of them too)

Not 100% sure what make they are i'll try to get some more info from the guy.


post-273-0-31146100-1438786356.jpg

#18
HiBoost

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Looks to me like what happened there is some idiot used an impact gun to install the cam sprockets and broke the dowel pin /end of the cam off... and then tried to weld that part back together.

I've actually seen this once before on one of the hack jobs we repaired.

 

Are you saying that you think that is the original broken pin welded back in?  I would hope that if somebody broke the original pin they would properly extract it and have a new one pressed in and no welding would be necessary.  Unless they had to drill it out and then the hole was oversized and they felt the new pin wasn't secure enough without a tack weld.  Either way it seems like extreme hackery, just trying to clarify what level you had seen previously lol


-Jeff

#19
Doug@WGP

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If you impact the sprockets on or off, the pin will break off by cracking the end of the cam. The pin is much harder than the cam metal. The shop probably welded the cam itself back together, hence the appearance of being sanded down and out of round.

I have a pic of this type of failure somewhere that I can dig up.
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Doug Ross
Owner of Weapons Grade Performance
-Northeast/Pacific Northwest Shops where we ONLY work on GT-Rs
-Owner/Builder of the 1st Ever Home Garage GT-R Drivetrain Removal
Cobb Protuner / EcuTek Tuner
-All Wheel Drive Mustang Dyno in House
doug@weaponsgradeperformance.com
Our Online Store
East Coast Location 226 N. Plains Industrial Rd, Wallingford CT 06492 203-668-4765


#20
HiBoost

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I see, that makes sense.  But yeah, 100% no way it came from a real cam manufacturer that way.  Zooming in on the picture now I see the cracked line through the cam itself, what a bunch of shit!


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-Jeff




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