Need picture of cylinder head temp sender, showing what material was removed from head |
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Need picture of cylinder head temp sender, showing what material was removed from head |
Cevan |
Nov 29 2007, 08:03 AM
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#1
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Senior Member Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 |
I'm installing a VDO CHT gauge. I've read that in order to make changing spark plugs easy, some amount of material needs to be removed from the head in order for the sender to clear it. I'm looking for a good photo showing this before I break out the Dremel tool and start grinding. A picture showing how you bent the sender ring would also help.
Also, I've read that the sender ring replaces the spark plug's crush washer. Is this accurate? |
VaccaRabite |
Nov 29 2007, 08:26 AM
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#2
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En Garde! Group: Admin Posts: 13,444 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Yes, it replaces the washer. I don't think you should remove metal from the head. I'd think that this would place a stress riser on the Cyl 3 spark plug hole, which is prone to cracking as it is all ready.
Zach |
jimkelly |
Nov 29 2007, 09:23 AM
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#3
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
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SLITS |
Nov 29 2007, 10:05 AM
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#4
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
Damn, I guess I'm stupid. I just put it under the plug and bent the tab on the ring. (IMG:style_emoticons/default/headbang.gif)
Since the "ring" is not a crush washer, I can't see how placing it under the crush washer would cause any problems. Yeh, mine works both on the 4 and the 6. |
purple |
Nov 29 2007, 10:30 AM
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#5
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Pigeon feeders attract me Group: Members Posts: 938 Joined: 24-July 07 From: Houston, TX Member No.: 7,942 Region Association: None |
I just removed the crush ring from the spark plug and the cht sender is the new gasket. works great for me! better than dicking with the heads!
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HAM Inc |
Nov 29 2007, 03:34 PM
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#6
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
It's much easier to change plugs if you notch the head. This needs to be done with the head on a work bench. I use a 3/8 egg carbide burr. Remove material that is between the vertical webs and work down until you are very close to the crush washer seal surface, but don't nick it. One must be very careful! When done correctly the sensor will lay in the head and stay in position during plug changes. We do all of our race heads this way. Unfortunately I have no photos.
We remove the crush washer, though it wouldn't be the end of the world if you left it in place. |
chris914 |
Nov 30 2007, 12:08 AM
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#7
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Member Group: Members Posts: 489 Joined: 24-July 04 From: San Diego, CA Member No.: 2,393 Region Association: Southern California |
Does putting the VDO sender under the stock sender work?
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Hammy |
Nov 30 2007, 02:26 AM
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#8
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mr. Wonderful Group: Members Posts: 1,826 Joined: 20-October 04 From: Columbia, California Member No.: 2,978 Region Association: Northern California |
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HalM |
Nov 30 2007, 07:07 AM
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#9
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Green Skull 003 Group: Members Posts: 127 Joined: 19-January 05 From: The 'Burg Member No.: 3,472 Region Association: None |
Anyone have a picture of a CHT installed? To my newbie's eyes, the picture Jim linked to and the other descriptions almost sound counter intuitive. Does the CHT mount in the #3 spark plug hole and the spark plug into the CHT?
Thanks! |
lotus_65 |
Nov 30 2007, 07:48 AM
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#10
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Senior Member Group: Members Posts: 1,608 Joined: 21-March 05 From: minneapolis, mn Member No.: 3,795 Region Association: Northstar Region |
there IS a thread on this, i just can't find it...
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Cevan |
Nov 30 2007, 08:21 AM
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#11
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Senior Member Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 |
I would prefer not to remove the head in order to make a notch. My thought was to find a bolt to fit the spark plug hole or just use from electrical tape to cover the hole to prevent metal from getting in the combustion chamber.
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HAM Inc |
Nov 30 2007, 08:26 AM
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#12
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
The prblem with doing this notching with the head on the engine, in the car, is that this operation requires precision work. Getting in the correct position would be tough. Sticking a bolt in the plug opening will prevent you from being able to notch low enough to make a difference.
If you don't want to remove the head I would just bend the tab and run it as is. A failed attempt at this operation could open a can of worms that would force you to remove the head. Placing the sensor anywhere but under the plug will not give you a meaningfull reading. |
Cevan |
Nov 30 2007, 09:13 AM
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#13
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Senior Member Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 |
This is the state of my engine currently, so I have great access to the head. It would seem that the sender ring would get in the way of the spark plug socket.
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purple |
Nov 30 2007, 07:36 PM
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#14
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Pigeon feeders attract me Group: Members Posts: 938 Joined: 24-July 07 From: Houston, TX Member No.: 7,942 Region Association: None |
dude, just put the vdo CHT ring under your #3 plug after removing the crush washer and be done with it.
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Elliot Cannon |
Nov 30 2007, 07:40 PM
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#15
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None |
What he said (IMG:style_emoticons/default/aktion035.gif)
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Elliot Cannon |
Nov 30 2007, 07:43 PM
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#16
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None |
Damn, I guess I'm stupid. I just put it under the plug and bent the tab on the ring. (IMG:style_emoticons/default/headbang.gif) Since the "ring" is not a crush washer, I can't see how placing it under the crush washer would cause any problems. Yeh, mine works both on the 4 and the 6. Ron, which cylinder did you use on the six? (IMG:style_emoticons/default/idea.gif) |
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