Bemused Mechanics!! - BMW Forum - BimmerWerkz.com
BMW Forum BMW Forum

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E36)
Register Home Forum Active Topics Gallery / Showroom Auto Loans Garage Search Today's Posts Mark Forums Read Auto EscrowInsurance

3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

BimmerWerkz.com is the premier BMW Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 07-21-2011, 11:54 AM   #1 (permalink)
n00b
 
Join Date: Jul 2011
Car:
Posts: 9
Photos:
rigerama is on a distinguished road
Bemused Mechanics!!

Hi looking for advice!!

Have a 1994 E36 318i. After about 15 miles the pressure in water system gets very high and temperature goes up. Have had radiator and water pump changed. No sign of head gasket problem as mechanic checked water system with a dye thing and says no problem there. Drives perfectly with no oil or water leaks or any sign of the two mixing. Just gets hot after driving that distance and pressure in hoses gets very high. Water seems to be circulating ok. Any suggestions would be welcome. Mechanics think it's something simple but bemused as to what it could be!!

Thank you in advance.

Rich
rigerama is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 07-21-2011, 03:09 PM   #2 (permalink)
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Car: BMW E38 728i 1996 Met Black
Posts: 2,194
Photos:
Jack Dabsy will become famous soon enough
Garage
Stupid question number one is: Do the fans kick-in?

Try this... (From COLD)... Start the engine with the Rad Cap OFF, and let it run until the point where you think it is overheating, then "Feel" the top and bottom hoses...
Let me know all your results, even what happens at the radiator!
__________________

Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline   Reply With Quote
Old 07-21-2011, 03:37 PM   #3 (permalink)
n00b
 
Join Date: Jul 2011
Car:
Posts: 9
Photos:
rigerama is on a distinguished road
Hi thanks have done this. The top hose gets hot. The bottom hose going into thermostat housing stays cold. The coolant slowly rises up the expansion chamber. Note the thermostat has already been removed. Thoughts? Thanks. Rich
rigerama is offline   Reply With Quote
Old 07-21-2011, 03:45 PM   #4 (permalink)
n00b
 
Join Date: Jul 2011
Car:
Posts: 9
Photos:
rigerama is on a distinguished road
Also by fans assume you mean radiator fan? If so yes it's on permanently as on the belt. If you mean fans in car then yes they do and blow out lots of heat when driving. Have had them on at times to help bring engine temp down. Thanks. Rich
rigerama is offline   Reply With Quote
Old 07-22-2011, 04:36 AM   #5 (permalink)
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Car: 2000 740iL Individual
Posts: 2,405
Photos:
brettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nice
Was this all happening prior to the water pump and radiator being changed?
Is the thermostat installed at all? There may be a large air lock that is isolating the coolant from the thermostat body (the thermostat isn't opening because it isn't getting hot enough). You could try drilling a small hole through the thermostat housing which will let air purge past the thermostat, and then it should behave normally.
__________________

Riding in style
brettski is offline   Reply With Quote
Old 07-22-2011, 04:41 AM   #6 (permalink)
n00b
 
Join Date: Jul 2011
Car:
Posts: 9
Photos:
rigerama is on a distinguished road
My friend had the car - all was working fine - the thermostat was working fine (it was a relatively new one that had been put in as the previous one was stuck in the open position - and had done about 3,000 miles since thermostat replaced with no problem) - he was stuck in traffic for a while and it was getting warm. He kept switching the car off to avoid overheat. Car was parked for three days, then he drove it again and there was a bang and a hole blown in side of radiator. Radiator was changed - still high pressure building in system after about 15 miles. Thermostat was removed - still high pressure in system after 15 miles. So, there is no thermostat in the car - and all was fine until the radiator blew. Seems to be pressure building up in the system somewhere - but just can't work it out!!!
rigerama is offline   Reply With Quote
Old 07-22-2011, 08:52 AM   #7 (permalink)
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Car: 2000 740iL Individual
Posts: 2,405
Photos:
brettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nice
Is there a air purge line that runs from the top of the radiator to the top of the expansion tank. Check that it isn't kinked.
__________________

Riding in style
brettski is offline   Reply With Quote
Old 07-22-2011, 09:19 AM   #8 (permalink)
n00b
 
Join Date: Jul 2011
Car:
Posts: 9
Photos:
rigerama is on a distinguished road
No afraid not expansion tank is on side of rad.
rigerama is offline   Reply With Quote
Old 07-22-2011, 12:50 PM   #9 (permalink)
n00b
 
Join Date: Jul 2011
Car:
Posts: 9
Photos:
rigerama is on a distinguished road
Been looking at it today. Coolant going round fine. No blockages and no contamination. Just intense pressure build up after about ten to fifteen minutes running and then overhears. Should the cap be releasing pressure? Ideas? Thanks.
rigerama is offline   Reply With Quote
Old 07-22-2011, 03:04 PM   #10 (permalink)
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Car: BMW E38 728i 1996 Met Black
Posts: 2,194
Photos:
Jack Dabsy will become famous soon enough
Garage
TBH There seems to be intense pressure in there...
Gotta be head gasket mate... Sorry !
__________________

Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline   Reply With Quote
Old 07-22-2011, 06:24 PM   #11 (permalink)
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Car: 2000 740iL Individual
Posts: 2,405
Photos:
brettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nice
If you leave the cap off the expansion bottle, do you see any signs of bubbling, and do you see the same pressure build up? Are the upper and lower hoses showing the same sorts of pressure buildup?
__________________

Riding in style
brettski is offline   Reply With Quote
Old 07-23-2011, 12:23 AM   #12 (permalink)
1st Gear Member
 
Join Date: Aug 2010
Location: Virginia
Car: 1994 E36 318I
Posts: 168
Photos:
Frozen 318i is on a distinguished road
if not head gasket...

if it not the head gasket it could be the head itself, My car did the same thing i thought it was the head gasket until i pulled the head and found a cracked water jacket.
Frozen 318i is offline   Reply With Quote
Old 07-23-2011, 01:07 AM   #13 (permalink)
1st Gear Member
 
Join Date: Aug 2010
Location: Virginia
Car: 1994 E36 318I
Posts: 168
Photos:
Frozen 318i is on a distinguished road
also check to see if your check valve and auxiliary water pump is working it is located on the fire wall in the fuse box area
Frozen 318i is offline   Reply With Quote
Old 07-23-2011, 11:50 AM   #14 (permalink)
n00b
 
Join Date: Jul 2011
Car:
Posts: 9
Photos:
rigerama is on a distinguished road
If cap off pressure pushes water to top of radiator. Thanks for all your advice. I'll check the electrics as suggested. Any further ideas greatly appreciated.
rigerama is offline   Reply With Quote
Old 07-26-2011, 07:10 AM   #15 (permalink)
5th Gear Member
 
jimmythepie's Avatar
 
Join Date: Jan 2007
Location: england
Car: 98,328i
Posts: 1,118
Photos:
jimmythepie jimmythepie jimmythepie jimmythepie
Go to a reputable mech who only does BMW, if it costs its worth it.
jimmythepie is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E36)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Any good BMW mechanics out there? bondibmw 3-Series (E36) 6 08-27-2009 08:49 PM
Atlanta BMW mechanics Teh Prof South East 5 09-09-2008 10:09 AM
Mechanics freshfish 5-Series (E12,E28, E34, E39, E60) 3 10-21-2004 04:39 PM
Raleigh, NC Mechanics dubumb Bimmer Talk/Motorsports Talk 0 01-28-2004 03:46 PM
BMW Mechanics In San Francisco peng 3-Series (E46, E90) 0 07-28-2003 01:00 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 07:26 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.