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Leaking engine oil pressure sensor (with pics)

Eric62

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Paint marks, Loctite products and constant inspection are your friends! When I raced, I went over every fastener and critical item before every race. Paint marks around the nut to show shifting and then a line to determine loosening. Stuff falling off at a combined 140 mph and 1.2 G's braking can just ruin your weekend. I still do it on my track car because I want to be able to drive home. OCD is a good condition to have for sports like ours.
 

Ruby Red GT350

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Loctite by itself isn't intended to be a thread sealer. Mine came loose about 1000 miles ago (I currently have 4400 miles) and I used Permatex Seal & Lock.

https://www.permatex.com/products/thread-compounds/seal-lock/
Did you do the work yourself? Mine is starting to back off a little and wanted to tackle it now but am very concerned about taking it to the dealer. I am very good mechanically and do not see a problem fixing it but wanted to verify with someone who has done it before.

It looks like you can remove the intake system to get to it and when installing you torque to 124 in pounds and turn an additional 180*. Does that sound right (read it on an on-line service manual)

Many thanks,
Dan
 
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11GT50

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Did you do the work yourself?
Yes I fixed it myself. The intake tubing and air box do come out and give pretty good access to it. I don't remember what torque spec I found but I ended up stopping before I came up to full spec because I didn't have a lot of confidence in the number I did find. I still check it periodically and it's been almost 2000 miles and a handful of track days and it hasn't visibly backed off. Clean in the threads in the block and on the sensor well before adding the sealant.
 
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Ruby Red GT350

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Yes I fixed it myself. The intake tubing and air box do come out and give pretty good access to it. I don't remember what torque spec I found but I ended up stopping before I came up to full spec because I didn't have a lot of confidence in the number I did find. I still check it periodically and it's been almost 2000 miles and a handful of track days and is hasn't visibly backed off. Clean in the threads in the block and on the sensor well before adding the sealant.
Thank you very much for responding- much appreciated. I assume the original marks lined up after you installed it?
 

THX 138

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UPDATE: After nearly a full year since my local dealer performed the repair according to the TSB, my oil pressure sensor has not loosened. I painted a fresh witness mark after the repair (in a different color) and while I had the front wheels off today, I checked the sensor and saw that the witness mark still lines up. I’ll be doing a full track weekend (Friday through Sunday) in early June and will report back after that event.
 

edebon

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I had this same problem. 2016 GT PP here. Ran a hot track day at NJMP on Sunday. By the time I got home I'd lost a quart of oil. Oil pressure never dropped so I'm glad I checked immediately. Probably good advice for anyone tracking their Mustang to check that.
 

edebon

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I just fixed mine on my 16 GT PP. I was lucky my wires acted like a safety wire and kept it from coming out completely.
Same here. Did you torque back to spec (124 lb.in then 180 degree turn)? I torqued mine to 124 lb.in but only did about 100 degree turn. 180 felt like too much
 

bpracer

Mark
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I went to swap to street tires and saw a trail of oil from under my car. Looks like my oil sender worked loose. From the painted witness marks it may have backed out about 10 degrees. No real noticeable oil loss other than the puddle under the car. Likely worked loose on the way home from the track.
 

bpracer

Mark
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Awaiting the Loctite 592 thread sealant to cure. It said it's for use on metal fittings like oil pressure senders. Taking off the cold air intake is definitely the way to go. You need a deep 27mm socket for the sender. I ended up tightening it past the original witness marks about the same as it backed out, 10-15 degrees.
 

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