Alpine951

Putting an 88 or 89 motor in my car. Pulled the 86 with scored cylinders out. I was puuting coolant in and it was leaking collant out the head near the firewall. \With the motor in the car I could see a hole, which looked to be threaded, over the freeze plug that is on the firewall side of the motor. I checked my 86 motor and there is no hole there on the 86. What is this for on the later motor and what goes there. if it's just a bolt any one know the size?

Ben951S

I'm thinking the wrong end but DME Coolant Temp Sensor ? Pic and post!

Alpine951

No pic. For clarification the hole and freeze plug are on the head. It's in between the can tower rear cork gasket and the freeze plug on the head.

Bri Bro

That is about were you would drill and tap a hole for the LR steam vent.
http://www.lindseyracing.com/LR/Parts/TECHSTEAM.html

Techno Duck

The head was possibly tapped for a steam vent.

http://www.lindseyracing.com/LR/Pors...951-STEAM.html

Thread is probably a 1/8NPT

Alpine951

That's the spot Brian. Steam vent? hmmm. OK

Alpine951

Guess I'll install the vent. Looks like someone on here may still have one for sale otherwise I'll order one from LR. thanks

Bri Bro

It does work, you can see a stream of bubbles in the tube. You could also put in a plug for the time being.

rlm328

One great thing about the steam vent is that you no longer have to burp the cooling system.

User 52121

+1

I put one in last winter when I had the motor out and "no burping" is good enough reason for it to be worth the cost.

Matt Sheppard

I have to try this; I dont enjoy bleeding coolant on any car.