V7 SLR Posted October 23, 2002 Share Posted October 23, 2002 I notice that the later K-equipped cars appear to have a different steel water rail bolted to the right hand side (from driver's perspective) of the engine. What is the reason for the change, and should I consider getting one to replace my older version? Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
scooby dooby doo Posted October 23, 2002 Share Posted October 23, 2002 Left hand side do you mean 🤔 Ie the exhaust side of the engine 🤔 I believe the design changed as the old one often use to leak where it joined the head and the exhaust/bellhousing corner of the engine. My old one leaked, was reground and given a new gasket and then leaked again and was replaced with the new type. HOOPY Membership Number 4136 R706KGU Link to comment Share on other sites More sharing options...
V7 SLR Posted October 23, 2002 Author Share Posted October 23, 2002 Damn. Yes. Never could tell the difference between left and right... and that's directly after watching "Full Metal Jacket" last night where Private Pile got a beating for not knowing either. Hmm... Mine's been off twice and never leaked on refitting. Is that the only reason then? Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
Tight fart Posted October 23, 2002 Share Posted October 23, 2002 My old style started leaking and has been changed for the new style. But if it aint broke don't fix it T.F@O.F Link to comment Share on other sites More sharing options...
Jason Plato Posted October 23, 2002 Share Posted October 23, 2002 The new style allows you to remove the exhaust manifold without draining and removing the water rail . Plus the flow from the bypass pipe is improved . I believe it still mounts onto the head in the same manner . dave Link to comment Share on other sites More sharing options...
Mike Bees Posted October 23, 2002 Share Posted October 23, 2002 With the old-style water rail you got no flow past the temp. gauge sender until the thermostat opened. The newer one fixes that. Mike Link to comment Share on other sites More sharing options...
Johnty Lyons Posted October 23, 2002 Share Posted October 23, 2002 😬speedy bees hits the spot V7 go for it a much better rail in my opinion jj jj N.I. L7C AO. Membership No.3927. Link to comment Share on other sites More sharing options...
CHRIS CLARK Posted October 23, 2002 Share Posted October 23, 2002 I asked the same 🤔 at Caterham a while back & got the same answer as Mikes just provided! Link to comment Share on other sites More sharing options...
Miraz Posted October 23, 2002 Share Posted October 23, 2002 The R500's use a remote sender kit that fits in the bypass hose, which would solve the sender position problem, but also will go someway to reduce the amount of engine vibration getting to the senders. Miraz Link to comment Share on other sites More sharing options...
Julian Thompson Posted October 23, 2002 Share Posted October 23, 2002 Mine seems to have this setup too. Link to comment Share on other sites More sharing options...
V7 SLR Posted October 24, 2002 Author Share Posted October 24, 2002 OK. Anyone got a new style one they want to sell? I'm convinced, especially as I've just replaced my standard water temp gauge with a lovely Spa version (although that sender is properly in the flow) and I'm about to get my engine remapped again soon (might as well spend time trying to get the engine temp-vs-fuelling right eh?). I'll drop a "Wanted" message in... Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
Mike Bees Posted October 24, 2002 Share Posted October 24, 2002 Your current water rail does have flow past the ECU temp. sender (it's in the bypass part of the circuit at the very back of the rail), so no problems with the mapping. Mike Link to comment Share on other sites More sharing options...
V7 SLR Posted October 24, 2002 Author Share Posted October 24, 2002 Which way does the water flow? Does it enter or exit the head where this rail joins the head? I've got the ECU temp sender on side of this point of entry/exit and the dash gauge sender the other side. The new rail appear to position them both on the same side of this junction. The "radiator" side. Miraz has indicated to me that the R500 setup uses a similar rail to the new one, but with no sender taps at all. Boith senders are then plumbed into the soft heater bypass pipework (using suitable junctions) which is supposed to eliminate vibration damage to the senders BUT this means the senders are now positioned on the other side of the water rail's junction with the head. Confused. Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
Mike Bees Posted October 25, 2002 Share Posted October 25, 2002 It exits the head at the water rail, and flows (a) forward through the rail to the rad (if the 'stat is open) and (b) back through the bypass/heater circuit. If that's wrong I hope someone will be along to put me right. Mike Link to comment Share on other sites More sharing options...
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