On 88 v6, Is the heater hose from thermostat pipe to firewall pipe on the firewall size 5/8ths on both ends? I found a few archived links asking about this preformed rubber house, bit nothing concrete. I plan to just use some universal heater house, and hope it won't have to make too much of a sharp bend to cause kinks.

[This message has been edited by sricka01 (edited 01-27-2013).]

This hose has mystified all.

Should be 3/4" The return is 5/8 I believe.

You know that you can remove the crimp, and just replace the section of hose... right?
The pipe on the firewall can remain in place. Just use a regular hose clamp.

My apologies if I have misunderstood your question.

[This message has been edited by Raydar (edited 01-29-2013).]

I don't see a crimp on this one, so can I just use universal heater hose? 5/8th? I don't know if heater hose has more than one size. I'd be really screwed if the thermostat neck and this pipe have two different sizes.

http://img835.imageshack.us...5/20130128222541.jpg

The hard lines accept a 5/8" heater hose. Its been a while since I had a 2.8 to verify the engine side fitting, but on the 88 2.5 it is 5/8"