[Fwd: Re: [wanderlodge] 8V92 Low Fuel Pressure]

[jvredden@...]

My number for oil and water are about where you say you were at. If the hyd
bypass is engaged then it drops a bunch. With no hyd bypass I see the
thermostat cycle around just over 190 to just under 190 and oil in the 230
range.
I took a temp gun and shot the water jacket and oil cooler and found both
to be around 190. I checked with the man that owned it before me. He owned
it for 10+ years and said that was the numbers that had always been with the
coach. Do I stick with what I got or get the radiator redone and put in a new
thermostat. It has 128k miles of running the way it is

john redden
91 PT40



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[krminyl@...]

Good job, Curt. Best of luck heading out to Glamis....should be nice this
weekend. Did you resolve the low fuel pressure issue?

Kevin
YL CA
86 38PT



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[Curt Sprenger]

This noon I headed the bus east about 20 miles and then back
west.Checking over all the oil, fuel and coolant connections, I don't
see any leaks.

The new thermostats and the radiator rod-out...Before this work the
engine ran at 190+ with the 180 thermostats. Engine oil temp. at 230 -
235. I replaced the 180s with 180s. Today, 80+ degrees out, the engine
coolant temperature was 180 - 185. The oil temp. was 220.

Usually there is at least 6,000 in tow. That was not part of todays
test. I'll be heading out to the Glamis Sand Dunes tomorrow or Thursday
with the 6,000 pounds behind the bus. I'll check the temperatures again.

Curt Sprenger
1987 PT38 8V92 "MacAttack Racing"
Anaheim Hills, Calif.




-------- Original Message --------
Subject: Re: [wanderlodge] 8V92 Low Fuel Pressure
Date: Mon, 12 Mar 2007 21:17:54 -0700
From: Curt Sprenger
To: wanderlodge@yahoogroups.com
References: <45F420E2.5070506@...>
<00a901c764a3$588c8740$6401a8c0@your4105e587b6>



I believe the big engine is purring just fine. I'll take her down the
highway for 50 miles tomorrow to validate all is good. I do not see any
coolant or fuel leaks here in the driveway.

This afternoon I retraced my steps and got my head straight, a good
thing, I hope. When priming the engine I failed to close off the feed
from the external fuel container when she was up and running, DUH. Makes
a big difference in fuel pressure readings. Engine is running to 60+
fuel pressure at high rpms before the pressure relief, and about 10 at
idle. No pressure reading at idle is fine by the experts and the book.

Thank you all for your input. Much appreciated. Next time just tell me
to take my time and do it right.

Curt Sprenger
1987 PT38 8V92 "MacAttack Racing"
Anaheim Hills, Calif.





--
Curt Sprenger
1987 PT38 8V92 "MacAttack Racing"
Anaheim Hills, Calif.

[Curt Sprenger]

John,

" Do I stick with what I got or get the radiator redone and put in a new
thermostat." Good question...

My 8V92 Shop Manuals are dated October 1988. The various 8V92
configurations all state Coolant Temperature 170-195.
Considering what Randy posted, his post got me started on my latest
project, I found what Randy pointed out, and that is the coolant hoses
to the air compressor are in question on our older units, yours not
being as old as my unit, but yours has 35,000 more
miles/heat/vibration/crud/etc.

Your engine coolant is operating within the specified range stated in
the 1988 manuals. I suggest finding the manuals that include your engine
year. Could be different as Detroit was trying to clean up the air with
the electronic controlled engines.

Sounds like the previous owner never changed the T-Stats or cleaned the
radiator. Considering the cost of a new engine, $25,000, changing the
T-Stats and cleaning and rodding-out the radiator would be good
preventative maintenance. If your radiator can be saved that is a good
thing. A new radiator core cost in the thousands.

A friend and I did all the removal and installing on my 'Bird. I saved
lots of dollars. The cost for the radiator rodding/cleaning came to
$696.00. Silicone hose price varies from store to store, silicone hose
clamps the same, none are cheap.

My advise. Change the T-Stats, remove the radiator and have it checked
and cleaned. While at it, replace the fuel hoses while the coolant tubes
are out. They need to be removed anyway to tackle the fuel lines. And be
sure to take care of the air compressor hoses. If you go this far, buy a
rebuild kit and rebuild the fan hydraulic motor and be sure to get new
o-rings for the hose adapters.

Lots to think about. Good project. Give yourself three weeks to get all
this done.

Good luck.

Curt Sprenger
1987 PT38 8V92 "MacAttack Racing"
Anaheim Hills, Calif.


jvredden@... wrote:

> My number for oil and water are about where you say you were at. If
> the hyd
> bypass is engaged then it drops a bunch. With no hyd bypass I see the
> thermostat cycle around just over 190 to just under 190 and oil in the
> 230 range.
> I took a temp gun and shot the water jacket and oil cooler and found both
> to be around 190. I checked with the man that owned it before me. He
> owned
> it for 10+ years and said that was the numbers that had always been
> with the
> coach. Do I stick with what I got or get the radiator redone and put
> in a new
> thermostat. It has 128k miles of running the way it is
>
> john redden
> 91 PT40
>


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[Curt Sprenger]

Kevin,

You missed the post on the low fuel pressure resolution...operator error.

Curt Sprenger
1987 PT38 8V92 "MacAttack Racing"
Anaheim Hills, Calif.



krminyl@... wrote:

> Good job, Curt. Best of luck heading out to Glamis....should be nice this
> weekend. Did you resolve the low fuel pressure issue?
>
> Kevin
> YL CA
> 86 38PT
>


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