slow heating

[markjohnson]

I gotta agree with the group here that says "get a fan shroud". An engine-driven fan like that is absolutely useless without having a shroud to direct the air flow thru the radiator. Also, that type fan shown is notorious for not moving much air with its' semi-flat blades with not much pitch. A nice, 5-bladed clutch fan would do wonders when coupled with a good shroud.

[COPO 70 RS/Z28]

Sorry, I thought I mentioned it is a 67 impala. Kwizz, psyco some others know the car. I didn't want to run a shroud if at all possible i'm trying to keep the factory look. The radiator has been recored since the photo.



I was trying to keep the car stock, it does have an aftermarket exhaust, it is the born with drivetrain. The assembly manual does not indicate a shroud, the radiator frame is not set up for a shroud. I was thinkig of running a clutch fan.Also I was almost thinking maybe running the colder stat (180)was allowing the coolant to run to fast, Ill try some of the suggestions

[SS427]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: COPO 70 RS/Z28</div><div class="ubbcode-body"> The assembly manual does not indicate a shroud, the radiator frame is not set up for a shroud.</div></div>

I was going to argue this as I have owned several 1967 396 and SS427 Impalas over the years and could have sworn they all had shrouds. After looking at some photos of the cars from the late 70's and early 80's with ones I could see, you are right, they did not.

However, my assembly manual shows #3903958 when used with RPO L35, with M35 or M40, L35 and N10 with L35 or M40, L36 and M40 with L72. Confusing.

[COPO 70 RS/Z28]

Its weird, In the copy I have they show a shroud (i have to look later) I think on the air injection reactor equipment radiator mounting page &quot; A16 K19&quot; but, Sheet A4 shows the radiator assmb but doesn't reference a shroud and A4 looks almost exact to what I have. Also Sheet A3 of the assembly manual &quot;396 &amp; 427 - generator mounting , fan, belt &amp; pulleys&quot; designates L35 &amp; L36. It shows the 4 blade fan but strangely it doesn't give a part number for the fan it lists the fan as &quot; PRODUCTION PART&quot;

There is a reference to UPC 13 Radiator assmb and radiator shroud assmb but the UPC13 sheets are not in the copy I have, copy is the KEY term here.

Strange??????

I wonder if it has something to do with the fact that the car is a very low option car. Power steering only?