1987 Wagoneer runs hot wont start - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Full Size Jeep Forum > 1987 Wagoneer runs hot wont start

NEW JK WRANGLER GRAB BARS NOW at ROCKRIDGE4WDRear Disc Brake Conversion Kit- TJ,YJ,XJSWAG 50 Cal Ammo Can Mount With M2A1 Can

Reply
Unread 09-01-2011, 02:26 PM   #1
sbarrese33
Registered User
 
Join Date: Sep 2011
Location: Huntington, NY
Posts: 7
1987 Wagoneer runs hot wont start

I have a 1987 Grand Wagoneer with a 360 motor. Starts right up..eventually gets up to 225 dgrees...still runs but when shut down wont even crank...soon as the engine cools off starts right up with no problem. Replaced radiator, heater core, therm, starter, selenoid, battery cables, and the timing is good...ready to pull my hair out....any suggestions??

sbarrese33 is offline   Reply With Quote
Unread 09-01-2011, 06:06 PM   #2
pleontks
Registered User
1976 J-Series Truck 
 
Join Date: Apr 2010
Location: Whetstone, Az
Posts: 1,130
look at fan clutch for overheating. look at ignition box for not starting.
__________________
Beauty is in the eye of the jeepowner.
pleontks is offline   Reply With Quote
Unread 09-01-2011, 10:01 PM   #3
Dr. Marneaus
Station Wagoneer
 
Dr. Marneaus's Avatar
1973 FSJ Wagoneer 
 
Join Date: May 2006
Location: Las Vegas, NV
Posts: 10,254
Something is causing you to overheat, which is the source of not starting.

Have you looked at your spark plugs to see the condition? They can tell you if you are running rich or lean (lean causing increased heat).

Also, you have obviously replaced the common points of failure, but have you checked out the condition of the coolant passages on the block? pulling the intake manifold and taking a look will let you know how heavily corroded they are. At the very least I'd suggest a complete coolant back flush to try and get any crap out of the system.

Next, I'd check the water pump. Not sure how many miles you have on it, but sometimes the impeller can wear down to the point where there are no blades on it, and it cant push the coolant through the block. Also heard of the incorrect year water pump installed, which had the impeller pushing the wrong way.

I'd check your plugs, check for vacuum leaks (something that can lead to a lean condition) and possibly replace the water pump.

The fan clutch as mentioned above is also a good point to start, however it will really only be a cause if yuo are only overheating at idle or in traffic. The fan clutch doesnt do a whole lot at highway speed, as there is plenty of air moving through the radiator, but if it is overheating at idle or in traffic, where the fan actually pulls air through the rad, it may be the culprit.

Hope this helps!

I replaced my radiator and theromostat (with a 185 degree unit) and my 1973 wag doesnt even pass 195 in the 115 degree vegas heat.
__________________
Andrew - Landscape architect in training. Not landscaper

If guns kill people, then pencils misspell words, cars make people drive drunk, and spoons made Rosie O' Donnell fat!

Quote:
Originally Posted by revelc View Post
Having a Full Size Jeep is likehaving a hot wife. When you take her out in public it turns heads, they can insight jealousy, you could look at them all day, they require a lot of attention, cost a lot to get them to do what you want them to do, but when they're not happy you'll be cussing, throwing things, and constantly weighing how much you'll lose if you divorce her.

The Beast Build Thread: Marns '73 Wagoneer Thread ----- The Camper Build Thread: Marns 1980 Jayco JayFinch6 Build Thread

Gone but not Forgotten: 97 TJs Build Up.

Dr. Marneaus is online now   Reply With Quote
Unread 09-02-2011, 09:28 PM   #4
temps425
Registered User
 
Join Date: Jul 2009
Location: WA STATE
Posts: 7
First thing I would do is re-bleed the cooling system. This is the most common problem in my experience. As far as the no start while hot, that is strange. Only thing I can think of is the ignition module. I can't think of any reason why the ignition would change based on the temp of the motor.
temps425 is offline   Reply With Quote
Unread 09-02-2011, 11:49 PM   #5
Dr. Marneaus
Station Wagoneer
 
Dr. Marneaus's Avatar
1973 FSJ Wagoneer 
 
Join Date: May 2006
Location: Las Vegas, NV
Posts: 10,254
Quote:
Originally Posted by temps425 View Post
First thing I would do is re-bleed the cooling system. This is the most common problem in my experience. As far as the no start while hot, that is strange. Only thing I can think of is the ignition module. I can't think of any reason why the ignition would change based on the temp of the motor.

No start while hot can be that the ignition timing is too far advanced once it warms up.
__________________
Andrew - Landscape architect in training. Not landscaper

If guns kill people, then pencils misspell words, cars make people drive drunk, and spoons made Rosie O' Donnell fat!

Quote:
Originally Posted by revelc View Post
Having a Full Size Jeep is likehaving a hot wife. When you take her out in public it turns heads, they can insight jealousy, you could look at them all day, they require a lot of attention, cost a lot to get them to do what you want them to do, but when they're not happy you'll be cussing, throwing things, and constantly weighing how much you'll lose if you divorce her.

The Beast Build Thread: Marns '73 Wagoneer Thread ----- The Camper Build Thread: Marns 1980 Jayco JayFinch6 Build Thread

Gone but not Forgotten: 97 TJs Build Up.

Dr. Marneaus is online now   Reply With Quote
Unread 09-03-2011, 01:29 AM   #6
Crazy4Wheelin
Registered User
1975 FSJ Wagoneer 
 
Join Date: Oct 2010
Location: Rapid City, South Dakota
Posts: 108
How bout vapor locking causing the no start after hot? The full size jeeps maintain a crapola amount of heat under the hoods after you turn them off. I ended up relocating my fuel filter on my exs because it would vapor lock all the time even when it didn't seem to be overheating. Fyi clear filters work wonders if you are wondering if it is vapor locking since you can see them fog up.
__________________
JEEP: The dirtiest of the four-letter words

☮ 75 Waggy ~Nadia~ Slightly built 401/TH400/BW1339 w/part time kit
☮ 96 ZJ ~Weebo~ Stock 4.0L with 31/10.50/R15
Crazy4Wheelin is offline   Reply With Quote
Unread 09-03-2011, 07:08 AM   #7
sbarrese33
Registered User
 
Join Date: Sep 2011
Location: Huntington, NY
Posts: 7
Going to check into the fan clutch and water pump....evrything else is good....cant even get the engine hot now in cool weather but on a hot day it gets up there and then engine wont crank....thanks for the suggestions...stay tuned
sbarrese33 is offline   Reply With Quote
Unread 09-09-2011, 07:21 AM   #8
sbarrese33
Registered User
 
Join Date: Sep 2011
Location: Huntington, NY
Posts: 7
So before I even had a chance to do the fan clutch and water pump....I am driving it and now that the weather is a bit cooler the temp is barely getting out of the blue on the temp gauge....but I turn the engine off and then try to restart...won't crank....soon as it cools off...it fires right up. Thing that is bothering me is that it is not that hot...not like before anyway. Any suggestions? Is this engine shot?...doesnt make sense since it runs fine...just wont crank when turned off.
sbarrese33 is offline   Reply With Quote
Unread 09-09-2011, 07:50 AM   #9
sbarrese33
Registered User
 
Join Date: Sep 2011
Location: Huntington, NY
Posts: 7
.....also we put a wrench on the motor when it was hot and could barely move it...but when cooled off move fine...if that helps.
sbarrese33 is offline   Reply With Quote
Unread 09-09-2011, 12:22 PM   #10
Dr. Marneaus
Station Wagoneer
 
Dr. Marneaus's Avatar
1973 FSJ Wagoneer 
 
Join Date: May 2006
Location: Las Vegas, NV
Posts: 10,254
Percolation? That wouldnt explain it being hard to turn though. Could still be vapor lock or flooding it can actually put fluid into the cylinder making it very difficult to turn.

so it wont even crank when hot? Have you tried a new starter?
__________________
Andrew - Landscape architect in training. Not landscaper

If guns kill people, then pencils misspell words, cars make people drive drunk, and spoons made Rosie O' Donnell fat!

Quote:
Originally Posted by revelc View Post
Having a Full Size Jeep is likehaving a hot wife. When you take her out in public it turns heads, they can insight jealousy, you could look at them all day, they require a lot of attention, cost a lot to get them to do what you want them to do, but when they're not happy you'll be cussing, throwing things, and constantly weighing how much you'll lose if you divorce her.

The Beast Build Thread: Marns '73 Wagoneer Thread ----- The Camper Build Thread: Marns 1980 Jayco JayFinch6 Build Thread

Gone but not Forgotten: 97 TJs Build Up.

Dr. Marneaus is online now   Reply With Quote
Unread 09-09-2011, 12:51 PM   #11
sbarrese33
Registered User
 
Join Date: Sep 2011
Location: Huntington, NY
Posts: 7
Starter is new...you can hear it trying but wont turn the motor...20 mins later when cools off...fires up like nothing ever happened....also keep in mind the engine runs fine...doesnt over-heat, doesnt stall...but when you turn the key off and try to restart when hot...wont crank.
sbarrese33 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.