Undertrays.....??

[Kevin]

(don\'t get much traffic down here to be honest...... 4 cars is a traffic jam )

Lucky you! lol.

Sat in traffic the water temps get up to late 80\'s

I was driving it at 6am the other day, it didn\'t drop below 69c but didn\'t go above 72c on a 40 mile run

It definately sounds like a thermostat problem.  Your temps appear to be phased by about 10 degrees if you get what I mean.  Normal temps should be around 82-85 whereas your getting 72, then stuck in traffic can be anything upto late 90\'s depending on when your fans kick in so yours are late 80\'s.

Therefore if they drop that drastically the water temp is not being regulated, again pointing to a thermostat problem.

Cold thermostats dont run that cold as standard operating temps on the FD should be around 81+ degrees.

[Jono FD3]

cool (no pun intended), The other thing is... I have got metal water pipes from the rad to the block (both to and from) so that would drop the temp a little too, would it not???
I\'ll get a new thermostat and try that first then!! would make my econamy a little better too I\'d of thought!! what sort of price are they & do I need any gasgets / O rings to do the job?

Jono

[Kevin]

There only cheapish, I dont think i\'ve ever paid more than a tenner for one (on any car), but it\'s been a while since i\'ve ordered one.

If you wana order a performance one, SARD do one for about 60 quid, but in this case I think your better off getting a genuine mazda one, seeing though your running a v-mount anyway.

I really dont think the metal water pipes will make that much of a difference to be honest.  But I maybe wrong (has been know in the past...... quite alot!! lol).

[RemarkLima]

I\'d agree that the metal water pipes wouldn\'t matter really, not enough to notice.

But if you have a PFC then you can change the map so it doesn\'t enrich the mixture t colder temps (I think there\'s a 50C - 80C band and then above), it\'ll make it a bit rough while it\'s warming up but would certainly help the economy!

But also I\'d agree, just get a standard thermostat, the cooler ones are a bit of a bodge IMHO, unless you can map for the cooler temps it\'s not going to help. And ~85C is absolutely fine.

[nikp]

But also I\'d agree, just get a standard thermostat, the cooler ones are a bit of a bodge IMHO, unless you can map for the cooler temps it\'s not going to help. And ~85C is absolutely fine.

85 is cooler than my vauxhall calibra used to run!! :p They run at 95, so Fds actually run quite cool.

[Dr-Rotor]

Very interesting....I have an FMIC setup and my water temps go to 77 on the motor way and come back up to 85 in slower traffic.
 
I have a 65c thermostat. Its only just done this since I have changed the rad cap to a better Apexi one and I have no AST at all.

[RemarkLima]

Very interesting....I have an FMIC setup and my water temps go to 77 on the motor way and come back up to 85 in slower traffic.
 
I have a 65c thermostat. Its only just done this since I have changed the rad cap to a better Apexi one and I have no AST at all.

If you want to run the engine that cool (IIRC it\'s just add a bit more NOx to the exhaust), just make sure the cold start enrichment is setup to be lower than that otherwise you\'re just sticking in extra fuel for no real reason if you see what I mean?

[Jono FD3]

Just orderd a new thermostat.... £6.50 deliverd from my local factors
Any pics of where the stat is & how to remove??

Jono

[nikp]

Where the filler neck is: that assembly is the thermostat housing. Bolts to the water pump housing using 3 10mm bolts. Be careful with those, if they haven\'t come off for a while they might sieze. (One of mine had siezed first time i took it off.)

[Jono FD3]

It had a new water pump just before I bought it in 05 so we should be OK I hope!!

Jono