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  #1  
Old April 27th, 2012, 10:37
REVROK REVROK is offline
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Some suggestions 98 head on a 91

Hey guys need some suggestions. Found some water in the oil on my 91 and had a 98 head sitting around that I knew was good so I saved $100 by having it rebuilt vs. getting a reman. I also used the purdy 98 valve cover. Now I have created a couple of unanticipated issues.
  1. The 98 head does not have a threaded hole for my temp sensor
  2. The 98 Valve cover is apparently missing some spacers that I did not know I needed and now I have a leaky valve cover
So now I am looking for an alternative way to get my temp sensor threaded into a water jacket that will not cause a different leak and will give me a good reading. I thought about drilling and tapping a freeze plug, but which one? and would it leak?

Just need a source for the little spacers for the valve cover. Have not been able to find them.
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  #2  
Old April 27th, 2012, 14:09
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Tim_MN Tim_MN is online now
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Re: Some suggestions 98 head on a 91

Drill and tap the thermostat cover for the sensor, or install the sensor in the block drain plug hole and extend the sensor wires. The temp sensor location is still there on the 98 head casting, it would just need drilling and tapping.
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I spent a few hours researching how to jack up an XJ, but even this is more complex than a normal car.
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  #3  
Old April 27th, 2012, 18:45
REVROK REVROK is offline
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Re: Some suggestions 98 head on a 91

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Originally Posted by Tim_MN View Post
Drill and tap the thermostat cover for the sensor, or install the sensor in the block drain plug hole and extend the sensor wires. The temp sensor location is still there on the 98 head casting, it would just need drilling and tapping.
Yeah, I saw that there was a flat area there, just trying to avoid pulling the head again. I think I may add an extension and go for your first idea... easy to do in aluminum. Curious, is the block plug the same size?
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  #4  
Old April 27th, 2012, 18:47
REVROK REVROK is offline
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Re: Some suggestions 98 head on a 91

Quote:
Originally Posted by REVROK View Post
Hey guys need some suggestions. Found some water in the oil on my 91 and had a 98 head sitting around that I knew was good so I saved $100 by having it rebuilt vs. getting a reman. I also used the purdy 98 valve cover. Now I have created a couple of unanticipated issues.
  1. The 98 head does not have a threaded hole for my temp sensor
  2. The 98 Valve cover is apparently missing some spacers that I did not know I needed and now I have a leaky valve cover
So now I am looking for an alternative way to get my temp sensor threaded into a water jacket that will not cause a different leak and will give me a good reading. I thought about drilling and tapping a freeze plug, but which one? and would it leak?

Just need a source for the little spacers for the valve cover. Have not been able to find them.
Any ideas on my second question? The oil spot on the driveway has not yet been noticed by my wife, but...
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  #5  
Old April 30th, 2012, 20:43
Devilfrog Devilfrog is offline
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Are you meaning the spacers between VC and head to prevent crushing the gasket?
They molded in and are part of the replacement rubber gasket.
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  #6  
Old April 30th, 2012, 22:14
REVROK REVROK is offline
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Re: Some suggestions 98 head on a 91

Quote:
Originally Posted by Devilfrog View Post
Are you meaning the spacers between VC and head to prevent crushing the gasket?
They molded in and are part of the replacement rubber gasket.
Apparently not the gasket I received. May just hit the stealership.
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  #7  
Old May 1st, 2012, 04:55
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Re: Some suggestions 98 head on a 91

Get the Fel-Pro gasket.
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  #8  
Old May 1st, 2012, 07:03
O-Gauge Steamer O-Gauge Steamer is offline
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Re: Some suggestions 98 head on a 91

Relocate the ECT sensor to the front by using the T-Stat housing for the 98.
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  #9  
Old May 1st, 2012, 10:20
REVROK REVROK is offline
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Re: Some suggestions 98 head on a 91

Quote:
Originally Posted by o-gauge-steamer View Post
Relocate the ECT sensor to the front by using the T-Stat housing for the 98.
Yeah, that may be the best idea... may need to hit Pick n pull

Quote:
Originally Posted by cruiser54 View Post
Get the Fel-Pro gasket.
I have the Fel Pro gasket, no spacers
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  #10  
Old May 2nd, 2012, 21:48
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Re: Some suggestions 98 head on a 91

The rubber fel pro has the compression stops in it more $ but won't leak and reuseable
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  #11  
Old May 3rd, 2012, 04:25
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Re: Some suggestions 98 head on a 91

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Originally Posted by ovxj757 View Post
The rubber fel pro has the compression stops in it more $ but won't leak and reuseable
Correct. Reusable. But not if you goop both sides of it with RTV. FelPro works the best.
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  #12  
Old May 3rd, 2012, 06:26
REVROK REVROK is offline
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Re: Some suggestions 98 head on a 91

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Originally Posted by cruiser54 View Post
Correct. Reusable. But not if you goop both sides of it with RTV. FelPro works the best.
RTV on rubber? I have the rubber FelPro... torqued to spec and leaking like crazy.
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  #13  
Old May 3rd, 2012, 06:32
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Re: Some suggestions 98 head on a 91

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Originally Posted by REVROK View Post
RTV on rubber? I have the rubber FelPro... torqued to spec and leaking like crazy.
The blue FelPro? Should be fine with no sealer/RTV.

Reusable as long as you don't put RTV on it.
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  #14  
Old May 3rd, 2012, 07:09
REVROK REVROK is offline
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Re: Some suggestions 98 head on a 91

Quote:
Originally Posted by cruiser54 View Post
The blue FelPro? Should be fine with no sealer/RTV.

Reusable as long as you don't put RTV on it.
Yes, I understand that, it is the blue FelPro... the gasket has no RTV on it, the problem is that it leaks and I am needing to figure out why! It may just be that I take it back off and either get a new gasket from the dealer or???
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  #15  
Old May 3rd, 2012, 07:51
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Talyn Talyn is offline
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Re: Some suggestions 98 head on a 91

Quote:
Originally Posted by Devilfrog View Post
They molded in and are part of the replacement rubber gasket.
No, they aren't.
Quote:
Originally Posted by cruiser54 View Post
Get the Fel-Pro gasket.
Won't help.

What he needs are 53020598AB (Torque Limiter Sleeve). Available at the dealer or Hesco after a very quick google. http://www.hesco.us/shop.asp?action=...D=45342&catId=

There is also the rubber grommet, but those usually come with the gasket, 53010424
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