94 - 96 TIM&JG Question - Part Numbers

[Floyd B.]

I seem to be coming across discrepancies between my car, GM Parts Listings and some of the part number charts in the TIM&JG. Two examples I am trying to sort out before I end up replacing original parts with incorrect replacements:

My car is a December '95 build LT4. On page 172 of the TIM&JG there is a list of accessory drive belts that states #10067477 is correct for LT4. However, my car currently has a #10230259. According to the parts catalog, this is correct and #10067477 is only for the LT5.

Another issue I'm trying to sort out are the upper and lower radiator hoses. My car currently sports #10278338 (upper) and #10257252 (lower). Again these are correct when consulting the parts catalog. However, on page 174 the TIM&JG provides #10135652 (upper) and #10135653 (lower) for LT1 & LT4. According to the parts catalog these hoses are for 90 - 91 Corvettes.

The parts catalog I am using is the 5/16/2003 PDF copy of the GM microfiche.

Can someone tell me what I doing wrong?

Thanx

[Kurt G.]

Re: 94 - 96 TIM&JG Question - Part Numbers

Floyd' there are too many part number mistakes in the 94-96 TIM&JG to mention. So many so that they are already working on a revision. The good side is, most of the judges on the regional and national level know most of the mistakes and are not penalizing when a known part number discrepancy is found, especially on a known original car. There have been many photos taken of my '94 to document the correct, original part number or configuration.

[Rick A.]

Re: 94 - 96 TIM&JG Question - Part Numbers

Kurt is correct, and that would be my question to you - are you the original owner, and are you positive those wear items have not been changed? Dealers are notorious for changing belts, hoses, etc. whenever you bring your vehicle in for service. And, I would be judging your car MECH area at a Regional or National event, except for Hampton, as I am the "judging chair" helping Roy

[Ed N.]

Re: 94 - 96 TIM&JG Question - Part Numbers

Your top hose should have a date code engraved into the bottom portion of the hose. Get a mirror and check for it. I'll send you a picture of mine. so you can see where it is located. This is the factory installed hose.

Upper Hose 2.jpgUpper Hose 3.jpgUpper Hose.jpg

[Pat F.]

Re: 94 - 96 TIM&JG Question - Part Numbers

Floyd, as to your serpentine belt, I have some information that the correct number for both the LT4 and LT5 is 10230259. This information was obtained through interviews with owners and other research. I have sent this information to Tom Barr.

Pertaining to your radiator hoses, do you have your build sheet? If you look at block 45 and it will show you an three letter alpha characters (MUW or similar). This should be on your upper hose and research shows that 10278338 is for the upper radiator hose on the some 95's and the 96 and if you look at block 46 you should see a 52 and that would be the last two numbers of hose number 10257252.

Also there are date codes on these hoses, sometimes you have to look under the hose to see it,

This information also has been sent to Tom Barr.

Again agreeing with Rick and Kurt, do not change anything until it is judged.

My information shows that 10135652 is the listing for an upper radiator hose for 1990-91 L-98.

I do not speak for NCRS Judging and I could be wrong, but these are my opinions and observations.

[Ed N.]

Re: 94 - 96 TIM&JG Question - Part Numbers

Floyd, as to your serpentine belt, I have some information that the correct number for both the LT4 and LT5 is 10230259. This information was obtained through interviews with owners and other research. I have sent this information to Tom Barr.

Pertaining to your radiator hoses, do you have your build sheet? If you look at block 45 and it will show you an three letter alpha characters (MUW or similar). This should be on your upper hose and research shows that 10278338 is for the upper radiator hose on the some 95's and the 96 and if you look at block 46 you should see a 52 and that would be the last two numbers of hose number 10257252.

Also there are date codes on these hoses, sometimes you have to look under the hose to see it,

This information also has been sent to Tom Barr.

Again agreeing with Rick and Kurt, do not change anything until it is judged.

My information shows that 10135652 is the listing for an upper radiator hose for 1990-91 L-98.

I do not speak for NCRS Judging and I could be wrong, but these are my opinions and observations.

Pat, your information is great. What would the "C4 suspects" do without you, Rick, Kurt and Joe (lol).

[Floyd B.]

Re: 94 - 96 TIM&JG Question - Part Numbers

Thanx Ed. That solves the mystery. The date code on the upper hose is 110795 CN which makes sense for my 122295 build date of the car.

[Floyd B.]

Re: 94 - 96 TIM&JG Question - Part Numbers

Rick,

The problem I face with this car is I can't confirm anything concerning the first 98k and 12 years of it's life. It came with virtually no documentation and a deep owners history. That's why I have to rely on external sources to help determine is the part is most likely original (or correct). However, the good news is that everyone of these mysteries - like the radiator hoses (see my response to Ed's post on where to find the hose date code) - has ended with a determination that the part is in all likelihood original. The replacement parts I have found so far are the oil filter, air filter, head lamps, fuel cap, convertible top, driver glass and windshield. Plus a few missing parts like the rear license plate panel and screws.

Thanx,

-Floyd-

[Floyd B.]

Re: 94 - 96 TIM&JG Question - Part Numbers

Pat, your information is great. What would the "C4 suspects" do without you, Rick, Kurt and Joe (lol).

Ditto, Ditto, Ditto!!! That's amazing. This all confirms (within any reasonable doubt) that the hoses and belt are original.

One more question: My build sheet, block 45, contains "MUZ". Is there a way to decode this and obtain the part number, which should be 10257252?

Thanx a million to everyone. This has helped me a lot.

[Ed N.]

Re: 94 - 96 TIM&JG Question - Part Numbers

Rick,

The problem I face with this car is I can't confirm anything concerning the first 98k and 12 years of it's life. It came with virtually no documentation and a deep owners history. That's why I have to rely on external sources to help determine is the part is most likely original (or correct). However, the good news is that everyone of these mysteries - like the radiator hoses (see my response to Ed's post on where to find the hose date code) - has ended with a determination that the part is in all likelihood original. The replacement parts I have found so far are the fuel filter, air filter, head lamps, fuel cap, convertible top, driver glass and windshield. Plus a few missing parts like the rear license plate panel and screws.

Thanx,

-Floyd-

Floyd, I'm sure you know this, but this is just a freindly reminder..., if you are going to change your convert top, make sure you retain your original rear window. Do you have the black plastic USA 1 GM plate holder?

[Ed N.]

Re: 94 - 96 TIM&JG Question - Part Numbers

Anytime Floyd. We have to get you Top Flighted.

[Floyd B.]

Re: 94 - 96 TIM&JG Question - Part Numbers

>> make sure you retain your original rear window
Unfortunately the car came with a replacement top. I have been searching for an original piece of glass since I got it. Ditto on the windshield.

>> Do you have the black plastic USA 1 GM plate holder?
Not at the moment but Sparky and CorvetteNutz said he has one for me.

[Floyd B.]

Re: 94 - 96 TIM&JG Question - Part Numbers

I hope to do just that at Kissimmee 2014

BTW, did you receive my email requesting a pic of one of your fuel injectors?

[Joe L.]

Re: 94 - 96 TIM&JG Question - Part Numbers

I seem to be coming across discrepancies between my car, GM Parts Listings and some of the part number charts in the TIM&JG. Two examples I am trying to sort out before I end up replacing original parts with incorrect replacements:

My car is a December '95 build LT4. On page 172 of the TIM&JG there is a list of accessory drive belts that states #10067477 is correct for LT4. However, my car currently has a #10230259. According to the parts catalog, this is correct and #10067477 is only for the LT5.

Another issue I'm trying to sort out are the upper and lower radiator hoses. My car currently sports #10278338 (upper) and #10257252 (lower). Again these are correct when consulting the parts catalog. However, on page 174 the TIM&JG provides #10135652 (upper) and #10135653 (lower) for LT1 & LT4. According to the parts catalog these hoses are for 90 - 91 Corvettes.

The parts catalog I am using is the 5/16/2003 PDF copy of the GM microfiche.

Can someone tell me what I doing wrong?

Thanx

Floyd------


Sometimes, part numbers change over time. However, in this case they did not. The part numbers for the belt and hoses you have on the car are those that I show as being the original part numbers, not subsequent replacement part numbers. I expect that the belt part number reference in the JG is simply a mistake. The hose part numbers may be the result of someone's "extrapolation" of the part numbers from earlier applications. I will say, though, that I do not understand why these part numbers differed from earlier (but I accept that they must have differed for a good reason).

[Floyd B.]

Re: 94 - 96 TIM&JG Question - Part Numbers

Thanx Joe. The date codes on my hoses would indicate they are original. See pix. The build date of my car is 12/22/95.

Upper 10278338 Date (2).jpgLower 10257252 Date (2).jpg