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01-30-2008, 12:43 AM
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#1 | |
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3" Exhaust
Join Date: May 2007
Location: Long Beach, CA
Posts: 224
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if you went by tsrm spec which is 58ft/lb thats where you went wrong you should have done 80-90ft/lb and went over it twice
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89 white package twin turbo Quote:
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01-30-2008, 02:35 AM
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#2 |
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Stock
Join Date: Jan 2008
Location: washington
Posts: 16
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why would i go against what a professional repair manual says? i know that they are not always as accurate as we would like but 80-90 as apposed to 58? come on!
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01-30-2008, 04:11 AM
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#3 |
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Super Moderator
Join Date: May 2007
Location: Billings, Montana
Posts: 1,034
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Read any thread about a bhg and you will know. Factory torque specs (which are the ones in the repair manuals) on the head are way too low...
When you replaced your head gasket did you use an O.E. one with new O.E. head bolts? Or did you use a metal head gasket with ARP head bolts or studs? If you used O.E. bolts/gasket, it should be torqued higher, but not to 80 or 90. Those bolts won't hold up that high. Check bhg threads for what others torqued their head bolts to. If you went with the ARP/metal head gasket then you should take it up to 80-90 ft./lbs This whole head gasket issue is the most common MKIII issue with the 7M engines, and people are writing about it all the time. Do some browsing around this forum and read bhg threads. This torque issue is in every one of them.
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1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels Last edited by btwilson86; 01-30-2008 at 04:15 AM. |
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01-30-2008, 05:12 AM
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#4 |
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1000whp postwhore
Join Date: Apr 2007
Location: Escape from the Prison Planet
Posts: 1,356
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I used ARP studs.
Torqued them to 85lbs in 5 passes. HKS stopper 2.mm mhg. The mhg alone was 350$ |
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01-30-2008, 06:18 AM
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#5 |
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Stock
Join Date: Jan 2008
Location: washington
Posts: 16
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i used all o.e. parts and torqued to about 65ft/lbs and this isnt the first head gasket ive done but it is the first toyota headgasket that ive done. im not too worried about, getting the new motor next week or the week after depending on shipping. after i put the new motor in im selling if anyone is in washington and interested let me know.
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01-30-2008, 09:22 AM
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#6 | |
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3" Exhaust
Join Date: May 2007
Location: Long Beach, CA
Posts: 224
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keep in mind that they came up with those specs 20 years ago and they found out it was way too low a couple thousand miles later
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89 white package twin turbo Quote:
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01-30-2008, 10:38 PM
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#7 |
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1000whp postwhore
Join Date: Apr 2007
Location: Escape from the Prison Planet
Posts: 1,356
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I hope you made the right choice.
Good Luck. |
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