[T2] [VB] Hot engine

Jim Arnott jrasite at eoni.com
Fri Sep 27 20:03:27 PDT 2019


BTDT.  ’62 Type 221. 1600 SP. Coming up out of Death Valley toward Ridgecrest.  Hot, hot, hot, smell the hot oil engine. Nothing obvious. Plenty of oil, no flaps to stick closed. The third time we stopped to let it cool down, I remembered being environmentally conscious when I checked to oil and not discarding the paper towel. I tossed it in the corner of the engine compartment right over there.  It ain’t there no mo’. Looked everywhere before I reached around the side of the shroud and peeled it off the fan.

You might check that there’s not something stuck in the fan.

> On Sep 27, 2019, at 3:56 PM, Chris Dreike <cdreike at gmail.com> wrote:
> 
> Thanks Jason,
> I think I have covered all of the bases you mentioned.
> All engine seals are in place. I have the doghouse system.
> I have Scat Cool Tins on the bottoms of the cylinders. (Maybe this is a
> problem and I should use the stock VW pieces?)
> I do not have thermostat flaps installed on the engine. If I pull it, I
> will install and wire them in the open position.
> I have a wide band sensor from Innovate and have managed to calibrate the
> megasquirt reading to the innovate gage to within about .2.
> I have an Innovate CHT gage with sensors on sparks 1 and 3. 1 is always
> about 15 degrees cooler at around 350F. I checked this with a laser temp
> gage and it matches within about 5 degrees F.
> 
> Today I started adjusting the A/F ratio settings and reduced the spark
> advance.
> 
> I took a drive up the local "hill" about 700 foot elevation rise and only
> saw 380F in 3rd gear at 45mph at WOT. Cooled slightly when I changed to 4th
> at WOT however could not quite pull the hill.
> I'm going to take a drive down the freeway tonight after traffic dies down
> and see what happens. Coming back the other night going slightly downhill
> at 50% throttle I was seeing 360-380F. Not good. Should have been about
> 310.  At WOT the temp just went up and up.
> 
> Cheers,
> Chris
> 
> On Fri, Sep 27, 2019 at 2:48 PM Jason Laster <jason at fasterlaster.com> wrote:
> 
>> A few thoughts that might help.  First off I ran a 1776 (carb) in my 66
>> camper for years.  Totally loaded down with 6 people and a dog with camping
>> gear.  There is enough cooling in the bus with a doghouse for this type of
>> punishment based on my experience.
>> 
>> Double check the engine cooling aspects.
>> Engine seal in place.
>> All engine tin installed (especially those little pieces on the bottom of
>> the cylinder fins).
>> Are there thermostat flaps in place and are they indeed operational?
>> 
>> Be sure and double check the AFR with some sort of other calibration.  I
>> found on my megasquirt system it reported a little lower than what the
>> actual innovative gauge that came with my LC-2 reports.  I bet that isn't
>> enough to worry about however.
>> 
>> Another aspect to consider is how you are getting engine head temps?  Is
>> it a regular CHT gauge that connects under the spark plugs, or is this the
>> MS reading?  Could this just be the normal reading for your engine when
>> it's just really hot ambient temp?
>> 
>> --
>> Jason
>> 
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