BHG Symptoms, troubleshooting ??

Paul_NJ · 08-13-2011, 03:51 AM

'87 Turbo 140K miles. Aw geez what next? . . . driving today and suddenly lost power in 1 and 2 gear, shaking on acceleration. When I stopped I could smell sweet burning smell. Was told there was white smoke coming thru exhaust, 10 minutes after I shut it off. Just replaced the timing belt last year, and I hate to go thru that again. Can someone give me a good troubleshooting procedure to determine if I have a BHG? Good winter project I suppose . . . can't imagine what it would cost to shop out. Any suggestions?

Thanks

cre · 08-13-2011, 06:46 AM

I'm sorely tempted to tell you to not bother spending time on diagnosis... Whatever it is (out of 2 total options) the head is coming out at a minimum. But, I don't like doing a laborious job unless I'm sure I need to. From what you describe a basic compression test and checking the oil and coolant for contamination should tell you all you need to know.

Paul_NJ · 10-10-2011, 03:25 AM

I ran a compression test today. Here are my numbers.

1 = 155 psi
2 = 125
3 = 110
4 = 105
5 = 140
6 = 145

Can you give me any further thoughts? Should I do a leakdown test as well . . . I can borrow a tester. Just want to make sure i get all the info I need now.

Thanks

CanadianBak'inSupra · 10-11-2011, 02:29 AM

http://www.cygnusx1.net/Supra/Librar...aspx?S=EM&P=21
tsrm is saying a 14psi difference between cylinders.
and Minimum pressure should be 128psi.

08-13-2011, 03:51 AM	#1
Paul_NJ Intake Join Date: Oct 2008 Location: New Jersey Posts: 36	BHG Symptoms, troubleshooting ?? '87 Turbo 140K miles. Aw geez what next? . . . driving today and suddenly lost power in 1 and 2 gear, shaking on acceleration. When I stopped I could smell sweet burning smell. Was told there was white smoke coming thru exhaust, 10 minutes after I shut it off. Just replaced the timing belt last year, and I hate to go thru that again. Can someone give me a good troubleshooting procedure to determine if I have a BHG? Good winter project I suppose . . . can't imagine what it would cost to shop out. Any suggestions? Thanks

08-13-2011, 06:46 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	I'm sorely tempted to tell you to not bother spending time on diagnosis... Whatever it is (out of 2 total options) the head is coming out at a minimum. But, I don't like doing a laborious job unless I'm sure I need to. From what you describe a basic compression test and checking the oil and coolant for contamination should tell you all you need to know. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

10-11-2011, 02:29 AM	#4
CanadianBak'inSupra Official hall monitor / search nazi - NO SOUP FOR YOU! Join Date: Oct 2009 Location: Canada, BC Posts: 837	http://www.cygnusx1.net/Supra/Librar...aspx?S=EM&P=21 tsrm is saying a 14psi difference between cylinders. and Minimum pressure should be 128psi. __________________ 1984 supra - 1uzfe - w58 - 4.10 - 1 piece aluminum shaft.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
coolant symptoms	italian89supra	MKIII Supra	1	05-06-2011 08:54 AM
Blown Head Gasket Symptoms!	Dejvid1785	MKIII FAQ	76	04-24-2011 07:59 PM
Troubleshooting	Durandal	MKIV Supra	13	07-18-2010 12:29 AM
86.5 and 87 symptoms	sd88supra	MKIII Supra	8	12-05-2007 08:56 AM
Clutch Troubleshooting	ivire	MKIII Supra	9	11-09-2006 01:29 AM

10-10-2011, 03:25 AM	#3
Paul_NJ Intake Join Date: Oct 2008 Location: New Jersey Posts: 36	I ran a compression test today. Here are my numbers. 1 = 155 psi 2 = 125 3 = 110 4 = 105 5 = 140 6 = 145 Can you give me any further thoughts? Should I do a leakdown test as well . . . I can borrow a tester. Just want to make sure i get all the info I need now. Thanks