tr7triumph.com

Is it the same in air con models? Also TR8?

TR7 Sprint & TR8

The AC matrix has an evaporator. Also different controls.

[img][IMG]http://i615.photobucket.com/albums/tt234/nickmi/TR7%201975/Yellow.jpg[/img]
nick
'79 TR7 DHC
'76 TR7 FHC

A/C models don't have the rubber seal thingy's that disintegrate and are hard to find.

- - -TR7 Spider - - - 1978 Spitfire- - - - 1976 Spitfire - - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT

No John, different. DZB3226 for the non A/C cars (with the seals DZB3255), the matrix for an A/C heater box is AAU2021. However same for TR7 & TR8 contained within the complete heater unit AAP273 for heater only cars or AAP274 for A/C cars.

As mentioned the A/C unit also contains AAP156 the evaporator for the cooling side.

Tony

<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">

Hi,

At least you don't have to worry about these bad boys on a A/C system -

http://www.ebay.co.uk/itm/Triumph-TR7-T ... 35dbb87ce3


Cheers John


LIVE LIFE A QUARTER OF A MILE AT A TIME!

1976 Speke FHC Beauty Now with an overdrive conversion

1979 3.5 FHC(STATUS PENDING!!)

1982 2.0 DHC NOW A 4.6, BUILT NOT BROUGHT !!!!

Wow! They're probably worth more gramme for gramme than gold is. No wonder they were auctioned instead of sold at a fixed price.

Personally I'd fit one of those replacement matrix without the rubber seals if I was rebuilding my heater again. I bought my replacement seals with those stainless steel pipes a couple of years ago just before the seals become unobtainable. A fiver for the pair [:)]



TR7 V8 DHC Jaguar Solent Blue. 9.35cr Range Rover V8, Holley 390cfm, JWR Dual Port, 214 Cam, Lumention, Tubular Manifolds, S/S Single Pipe Exh, 3.08 Rear, 200lb Spax & PolyBushes all round, Anti- Dive, Strut-Top Roller Bearings, Capri Vented Discs & Calipers, Braided Hoses, 4 Speed Rear Cylinders, Uprated Master Cylinder & Servo, AT 14" 5 Spokes or Maestro Turbo 15" Alloys, Cruise Lights, S/S Heater Pipes, Replacement Fuel Tank. No Door Stickers. Mine since July 1986, V8 from 1991 courtesy of S&S V8 conversion kit (built not bought) and big brake kit.

A good example of the influence of supply & demand - on that basis I've got about £200 worth of seals[:D]

The alternative matrix idea sounds attractive but you still have a section of rubber hose between the pipes & the inlet/outlet, so is the hose likely to last longer than the seals? I guess you could use proper automotive silicon hose which does seem to be less susceptible to deterioration with age. Anyone tried it?

Tony

<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">

The modified matrix sold by S+S is very good, just make sure you use good quality reinforced hoses.

www.triumphtrs.co.uk
THE Coca Cola car
The C+C Conversions rally car JDG 941V
TR7 Sprint SJW 530S on the road for the 1st time since 1984
TR7 Sprint SJW 539S

Good quality hoses seem to be made of unobtanium.The original hoses have every right to fail at 30+years,quality replacenents from a well known racepart supplier,reinforced with kevlar,fail after 5 years.Fuel hose fron a leading parts retailer leak after 2 years.how can you determine quality?Steve..

I replaced my matrix with the heater matrix from a VW. The details are in the workshop section. The PO had rebuilt the matrix in 1999 and replaced the steel pipes with heater hose. He had kept the original matrix and silver soldered short sections of pipe in place instead of using the rubber seals. The matrix itself was weeping coolant and I couldn't tell if it was the solder joints or internally somewhere else.

The car sat for 15 years until I restarted it in March of this year. The replacement hoses he had put in didn't leak in spite of sitting all that time. When I replaced the matrix with the VW unit I put in new good quality hoses, but can't comment on how long they'll last. The car has been my daily driver since I got it running and I've had no problems so far - touch wood. Do others find their hoses in the engine bay failing that often?

I replaced all rubber hoses 7 years ago (coolant/fuel), fuel hoses were 50 lb. hoses (regulator limits it to 34 lbs.) Everything is fine so far. The upper coolant hose (made in UK) runs hottest and has fine cracks on the ends were the jubilee clip grips it. No leaks but next coolant change I'll change it out (as well as install tap in place of LH side block plug).

- - -TR7 Spider - - - 1978 Spitfire- - - - 1976 Spitfire - - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT

I had a fuel hose, branded with a top US name, fail in about 12 months. It developed very fine radial cracks which I did not notice, then split. You had to bend the hose around a finger to get the cracks to open up enough to see. They were invisible when the hose was fitted to the pump.

About 3 years ago my son fitted a new hose to the transmission oil cooler. This lasted only minutes, failing after about 10 kilometers of driving.

I then got onto our gearbox builder, who builds a large percentage of the drag racing boxes in Queensland.

He advised most of the hose is now coming out of Asia or Mexico, & is really bad. Top brand names are using this hose. His advice was use only hose branded MADE IN THE USA. He also suggested using injection hose only, even on carb engines, for extra quality construction.

I've had no further problems following this advice.

Hasbeen