Mocal sandwich plate coming loose - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Shark_Bait88 · 10-08-2018, 01:25 PM

Hey folks! So I installed a Perrin oil cooler kit earlier this year, and have had a somewhat recurring issue with the sandwich plate coming loose and leaking oil.

It looks like part of the issue could be that the adapter for one of the lines makes contact with the stock intake box, which I'm guessing applies pressure in a counter-clockwise direction under load and over bumps. Another factor is simply that the design of the Mocal sandwich plate makes it difficult to properly tighten with most sockets.

Has anyone else had this same issue? Were you able to orient the plate so that the lines have sufficient clearance from the stock air box? Mine actually has had the adapter melt the plastic a bit.

Also, any recommendations for a thin walled 27mm socket that will make tightening the sandwich plate easier?

finch1750 · 10-08-2018, 01:52 PM

I just use a large crescent wrench. Doesn't seat super well but still gets adequate torque.

ZionsWrath · 10-08-2018, 03:09 PM

I had a similar issue with my Jackson Racing kit. I believe they fixed it now by removing some material around the bolt so you can fit a socket completely on it.

For me I used a 12 point socket and 1/2" ratchet. Apply downward pressure directly above the socket and turn it slowly so as to not slip off and round it. Haven't had any leaking after I did this.

Mine also contacts my air box but if you position it JUST RIGHT it won't touch even on track driving. The hard part is changing the air filter lol

DarkSunrise · 10-08-2018, 03:17 PM

Ive got a Perrin oil cooler. I was able to position mine to give about a half inch of space between the lines and the air box.

I had a machine shop take some material off an existing socket to make it fit. Much easier to tighten down that way.

No problems with leaks or loosening, even after a dozen plus track days.

Tonrogs · 10-08-2018, 05:08 PM

I used a small pneumatic grinder and made room for my socket to fit properly. Then cleaned it off really really well....

Clipdat · 10-09-2018, 02:57 AM

I documented my similar experience here: http://www.ft86club.com/forums/showthread.php?t=127021

10-08-2018, 01:25 PM	#1
Shark_Bait88 Senior Member Join Date: Jun 2014 Drives: 2013 Firestorm FR-S Location: Midwest Posts: 1,350 Thanks: 1,674 Thanked 865 Times in 481 Posts Mentioned: 12 Post(s) Tagged: 2 Thread(s)	Mocal sandwich plate coming loose Hey folks! So I installed a Perrin oil cooler kit earlier this year, and have had a somewhat recurring issue with the sandwich plate coming loose and leaking oil. It looks like part of the issue could be that the adapter for one of the lines makes contact with the stock intake box, which I'm guessing applies pressure in a counter-clockwise direction under load and over bumps. Another factor is simply that the design of the Mocal sandwich plate makes it difficult to properly tighten with most sockets. Has anyone else had this same issue? Were you able to orient the plate so that the lines have sufficient clearance from the stock air box? Mine actually has had the adapter melt the plastic a bit. Also, any recommendations for a thin walled 27mm socket that will make tightening the sandwich plate easier? __________________ "Shark_Bait88, the man who’s spent the most money modding his stock FR-S and it’s still stock." -@jdnguyen

10-08-2018, 01:52 PM	#2
finch1750 Undisputed El Presidente Join Date: Jun 2012 Drives: Zenki 37J ZN6 Location: Stockton, CA Posts: 11,593 Thanks: 9,403 Thanked 9,411 Times in 5,270 Posts Mentioned: 374 Post(s) Tagged: 33 Thread(s)	I just use a large crescent wrench. Doesn't seat super well but still gets adequate torque. __________________ "Just like how a strut bar somehow enables you to corner 20MPH faster around a cloverleaf on-ramp, when the reality is, you can do it already but you just don't have to balls to do it." - CSG David

10-08-2018, 03:09 PM	#3
ZionsWrath Thanks Join Date: Apr 2013 Drives: BRZ Location: NY Posts: 4,163 Thanks: 5,989 Thanked 3,100 Times in 1,498 Posts Mentioned: 38 Post(s) Tagged: 3 Thread(s)	I had a similar issue with my Jackson Racing kit. I believe they fixed it now by removing some material around the bolt so you can fit a socket completely on it. For me I used a 12 point socket and 1/2" ratchet. Apply downward pressure directly above the socket and turn it slowly so as to not slip off and round it. Haven't had any leaking after I did this. Mine also contacts my air box but if you position it JUST RIGHT it won't touch even on track driving. The hard part is changing the air filter lol __________________

10-08-2018, 03:17 PM	#4
DarkSunrise Senior Member Join Date: Apr 2012 Drives: 22 BRZ (Previously 13 FR-S) Location: USA Posts: 5,798 Thanks: 2,187 Thanked 4,243 Times in 2,221 Posts Mentioned: 48 Post(s) Tagged: 2 Thread(s)	Ive got a Perrin oil cooler. I was able to position mine to give about a half inch of space between the lines and the air box. I had a machine shop take some material off an existing socket to make it fit. Much easier to tighten down that way. No problems with leaks or loosening, even after a dozen plus track days. __________________ "Never run out of real estate, traction, and ideas at the same time." 2022 BRZ Build 2013 FR-S Build

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10-08-2018, 05:08 PM	#5
Tonrogs Senior Member Join Date: Apr 2018 Drives: 2014 BRZ Limited, Satin White Pearl Location: WI, 53593 Posts: 106 Thanks: 10 Thanked 40 Times in 30 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I used a small pneumatic grinder and made room for my socket to fit properly. Then cleaned it off really really well....

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