Leaking Cam Sensor? - ZR-1 Net Registry Forums

32valvZ · 09-06-2018

I think this is the cam sensor... how do I make it stop leaking and what is the process for removal? Looks like its been seeping for a long time... I wiped it off in the pic, but the block has old oil traking down the side of it from this spot...

Ccmano · 09-06-2018

The cam sensor sits above the exhaust ports on the head. One bolt holds it in and it is sealed with a simple O-ring nothing else. While possible, more likely your leak is from the header stud at center bottom of the exhaust ports. Simply. Remove it, clean and reseal with high temp RTV.
H

32valvZ · 09-06-2018

Ok, I will reseal the header stud for sure.... HOWEVER... I am pretty certain I see a leak at the cam sensor. Look at the picture... do you see where its wet? I had just wiped that a couple minutes before taking the picture. So then I qould need a new O ring I assume... If thats the case... anything to watch out for when I remove it to replace the O ring?

Ccmano · 09-06-2018

Just make sure the O-ring is oil resistant. Check the sensor for cracks, but that’s highly unlikely. If the body of the sensor is compromised you get oil coming our where the wires go in. That’s about it.
H

32valvZ · 09-06-2018

Ok, thanks Hans

ABBEZR1 · 09-09-2018

My cam sensor started to leak a few years ago and in fact after talking with Jerry he said a crack in the plastic was common and is a source for the leak. At that time 3 or 4 years ago he didn't have a good source for them and wasn't selling them...not sure if he is at this time or not but I was able to source one from Rock Auto and hasn't leaked since. Small note, the heat shield is slightly different and I had to slightly modify it but nothing major.

Hope this helps,

Steve

32valvZ · 09-09-2018

Thanks Steve... After the headers and exhaust are complete, Ill move on to the sensor and whatever is next...

32valvZ · 09-17-2018

Well, the cam sensor was indeed leaking from the where the wires exit the sensor. I examined the sensor and could see a very fine crack on the flat portion of the sensor. I guess that was enough to leak especially when hot from expansion of the crack. All good now! Thanks again Phil!

09-06-2018	#2
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Leaking Cam Sensor? The cam sensor sits above the exhaust ports on the head. One bolt holds it in and it is sealed with a simple O-ring nothing else. While possible, more likely your leak is from the header stud at center bottom of the exhaust ports. Simply. Remove it, clean and reseal with high temp RTV. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. Last edited by Ccmano; 09-06-2018 at 03:20 PM.

09-06-2018	#3
32valvZ Join Date: Nov 2007 Location: Sunshine State Posts: 1,071	Re: Leaking Cam Sensor? Ok, I will reseal the header stud for sure.... HOWEVER... I am pretty certain I see a leak at the cam sensor. Look at the picture... do you see where its wet? I had just wiped that a couple minutes before taking the picture. So then I qould need a new O ring I assume... If thats the case... anything to watch out for when I remove it to replace the O ring? __________________ [B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B] Last edited by 32valvZ; 09-06-2018 at 04:19 PM.

09-06-2018	#4
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Leaking Cam Sensor? Just make sure the O-ring is oil resistant. Check the sensor for cracks, but that’s highly unlikely. If the body of the sensor is compromised you get oil coming our where the wires go in. That’s about it. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

09-06-2018	#5
32valvZ Join Date: Nov 2007 Location: Sunshine State Posts: 1,071	Re: Leaking Cam Sensor? Ok, thanks Hans __________________ [B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B]

09-09-2018	#6
ABBEZR1 Join Date: Apr 2017 Location: Jackson,Mi, Area Posts: 52	Re: Leaking Cam Sensor? My cam sensor started to leak a few years ago and in fact after talking with Jerry he said a crack in the plastic was common and is a source for the leak. At that time 3 or 4 years ago he didn't have a good source for them and wasn't selling them...not sure if he is at this time or not but I was able to source one from Rock Auto and hasn't leaked since. Small note, the heat shield is slightly different and I had to slightly modify it but nothing major. Hope this helps, Steve __________________ _______________________ 1990 Bright Red/Black #946 B and B X-Pipe Stainless Works Long Tube Headers Cat delete 49th Street Rockers Haibeck Chip and Tune

09-09-2018	#7
32valvZ Join Date: Nov 2007 Location: Sunshine State Posts: 1,071	Re: Leaking Cam Sensor? Thanks Steve... After the headers and exhaust are complete, Ill move on to the sensor and whatever is next... __________________ [B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B]

09-17-2018	#8
32valvZ Join Date: Nov 2007 Location: Sunshine State Posts: 1,071	Re: Leaking Cam Sensor? Well, the cam sensor was indeed leaking from the where the wires exit the sensor. I examined the sensor and could see a very fine crack on the flat portion of the sensor. I guess that was enough to leak especially when hot from expansion of the crack. All good now! Thanks again Phil! __________________ [B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B]