'85 200hp merc head bolt torque specs?

[JerseyJim]

I have a mid 80s merc 200hp with a faulty overheat sensor. THe sensor loks like it is bolted directly into the heads with headbolts. FOr those familiar with the older mercs, the heads are diamond shaped, and the overheat sensor is a single wire attached with two head bolts. <br /><br />What should I re-torque these bolts to when i replace the sensor? Thanks in advance!

 

[Kenny Bush]

Re: '85 200hp merc head bolt torque specs?

JJ, I will look in my manuals at home tonight(you should already have one). I have done so many you would think I would remember......... I'll post back unless someone chimes in here with the answer(which they usually do.).

 

[JerseyJim]

Re: '85 200hp merc head bolt torque specs?

i have a seloc, I will check it for torque specs..

 

[redneckn]

Re: '85 200hp merc head bolt torque specs?

12.5 ft lbs according to seloc and recheck after three hours of operation.

 

[85merc200]

Re: '85 200hp merc head bolt torque specs?

hey jersey jim good to see other older mercs 200 running,,,i'm having a running rich problem...<br /><br />can you describe what your plugs look like in general like color, dry, wet,,,thanks

 

[JerseyJim]

Re: '85 200hp merc head bolt torque specs?

the torque specs were 35lbs

 

[JerseyJim]

Re: '85 200hp merc head bolt torque specs?

redneck, the 12.5lbs are for 74deg v6 engines (3.4l 250hp and above), not for 60deg v6 engines (150, 175, 200, 225 hp)

 

[JerseyJim]

Re: '85 200hp merc head bolt torque specs?

85merc200: i just pulled all the plugs while running a compression test this weekend. The plugs were wet on the center contact of the plug (i have NGK BUHW's in it). They should not be black or white, and the center should not be too worn.