94 LT1 Dipstick Question

[Jim P.]

I have a 94 LT1 that I just got back from the engine rebuilder. My dipstick was broken so I bought one on ebay and it may not be correct - it is 20 1/2 inches long from tip to bottom of cap. The dipstick tube is located passenger side on the bolt closest to firewall on center of the exhaust manifold. When I push stick in all of the way I can hear it hitting crank when engine is running - but even after changing oil and putting in a full 5 quarts - on the stick it reads about a quart low.

I am thinking the tube is somehow turned the wrong way or I have the wrong dipstick - any ideas?

[David L.]

Re: 94 LT1 Dipstick Question

I believe that the 94 Corvette LT1 dipstick is the same one used on 92 LT1 which is GM # 10108430. The 10067418 dipstick was used on the 90-95 LT5 Corvettes. Is there a part number stamped on the dipstick?

The dipstick on my 94 Z28 w/LT1 is GM # 10232187.

Dave

[Joe L.]

Re: 94 LT1 Dipstick Question

I have a 94 LT1 that I just got back from the engine rebuilder. My dipstick was broken so I bought one on ebay and it may not be correct - it is 20 1/2 inches long from tip to bottom of cap. The dipstick tube is located passenger side on the bolt closest to firewall on center of the exhaust manifold. When I push stick in all of the way I can hear it hitting crank when engine is running - but even after changing oil and putting in a full 5 quarts - on the stick it reads about a quart low.

I am thinking the tube is somehow turned the wrong way or I have the wrong dipstick - any ideas?

Jim-------

I measure the 92-94 dipstick at 20-3/4" but our measuring methodologies might be slightly different.

In any event, the 92-94 LT1 dipstick is, as Dave mentions, GM #10108430. That number is stamped on the blade. If you have that number, you have a correct dipstick. If you have some other number, you don't. It's as simple as that.

[Jim P.]

Re: 94 LT1 Dipstick Question

Jim-------

I measure the 92-94 dipstick at 20-3/4" but our measuring methodologies might be slightly different.

In any event, the 92-94 LT1 dipstick is, as Dave mentions, GM #10108430. That number is stamped on the blade. If you have that number, you have a correct dipstick. If you have some other number, you don't. It's as simple as that.

Ok I checked the part # and it is 10108430 so it is the right stick. The tube must be positioned incorrectly - can some one post a picture? Thanks very much.

[Joe L.]

Re: 94 LT1 Dipstick Question

Ok I checked the part # and it is 10108430 so it is the right stick. The tube must be positioned incorrectly - can some one post a picture? Thanks very much.

Jim-------


I don't think that tube positioning would affect this, at all. However, an incorrect tube might very well.

[David L.]

Re: 94 LT1 Dipstick Question

The rebuilder may have installed the wrong dipstick tube. The tube part # is 10108520 and is no longer available from GM. There is a drawing in my parts catalog of the 10108520 tube but I also found a drawing on the web (see link below). You have to click on the bold blue description to see the drawing.

Dave

http://parts.royaloakschevy.com/p/Chevrolet__/TUBE-Engine-Oil-Level/47045858/10108520.html

[Joe L.]

Re: 94 LT1 Dipstick Question

The rebuilder may have installed the wrong dipstick tube. The tube part # is 10108520 and is no longer available from GM. There is a drawing in my parts catalog of the 10108520 tube but I also found a drawing on the web (see link below). You have to click on the bold blue description to see the drawing.

Dave

http://parts.royaloakschevy.com/p/Ch.../10108520.html

Dave and Jim------


Here are photos of the 92-94 LT1 dipstick tube, GM #10108520, and the 1995-96 dipstick tube, GM #12551185. The 1010820 is at the top of the first photo; the 12551155 is the lower one in the photo. The 10108520 is about 16-11/16" developed length (i.e. the length as if the tube were straightened out). The 12551155 is about 17-1/4" developed length.

[David L.]

Re: 94 LT1 Dipstick Question

Joe,

I think that you solved this case. It seems to me that if you cut off about 9/16" from the 12551155 tube it would be close enough to be a good substitute for the 10108520 tube.

An accurate way to measure the difference between the two tubes is to insert the dipstick into both tubes and then measure the exposed dipstick length on the (bottom) end of the tube.

Dave

[Jim P.]

Re: 94 LT1 Dipstick Question

I took the tube out and R752 is stamped on the brace and it measures 16 7/8th inch measured on the outside radius, so I guess it is the right stick and it may just be its positioning. Now I guess I need to get underneath the car to find the hole the tube goes back into - I can't seem to find it from the top. Any suggestions?