MX5 oil and temperature not connected...

Mr Morlock · Postby **Mr Morlock** » Thu May 27, 2010 7:24 pm

I know I am repetitive but if you have a problem then it should be settled with the mechanic that did the job. There has to be a guarantee of the work done and one also imagines it was not cheap. If you have anyone else modify, change or touch it then the repairer may be able to avoid responsibility. Use your consumer rights but also give the mechanic an opportunity of rectifying it.

mx51982 · Postby **mx51982** » Fri May 28, 2010 10:18 am

I mean ill take it up with him, but if its an easy fix, I would much rather do it myself.

On another note, I've found some genuine sensors for around the 80 dollar mark, if i purchase one is it just as simple as switching the two around? Ill probably tell him that he needs to foot the bill, but I'll do the work. I just don't want to leave the car with him because he takes way too long with anything he does.

I really hope there is no head gasket issue, this is starting to drive me insane.

But when I get the invoice I will definitely check the part numbers.

Thanks

greenMachine · Postby **greenMachine** » Fri May 28, 2010 4:52 pm

mx51982 wrote:I mean ill take it up with him, but if its an easy fix, I would much rather do it myself.

But when I get the invoice I will definitely check the part numbers.

Thanks

Sorry to be the bearer of (possibly) bad tidings.

Re the invoice, I meant his invoice from his supplier. It MAY be on his invoice to you, but I would try and sight the invoice for the gasket myself. That way you know who his supplier is, and have the option to go to the supplier yourself if needed.

However, you might like to check with a forum sponsor to see what sort of an issue this might be for you before you get too paranoid about it, that might be a better basis for deciding how, and how vigorously, you pursue a resolution.

Good luck

mx51982 · Postby **mx51982** » Fri May 28, 2010 6:45 pm

Things just keep getting better..

It's just hard to explain why I am reluctant to go back.

But I think i have it sorted mostly! Thanks anyway guys, and again, if someone might happen to have a spare plug let me know before i buy one from mazda

93_Clubman · Postby **93_Clubman** » Sat May 29, 2010 12:55 pm

mx51982 wrote:I've found some genuine sensors for around the 80 dollar mark, if i purchase one is it just as simple as switching the two around?

Not necessarily as it will need to be compatible with the ECU.

mx51982 wrote:if someone might happen to have a spare plug let me know before i buy one from mazda

Plug is part of the wiring loom & may not be available separately.

Would still be useful to see a pic of your engine, so we can advise if an NB8A intake manifold & head are present.

mx51982 · Postby **mx51982** » Sun May 30, 2010 10:55 pm

93_Clubman wrote:Would still be useful to see a pic of your engine, so we can advise if an NB8A intake manifold & head are present.

Oh can you tell from a picture? Ill organize one tomorrow.

I mean i talked to Dick from MX5 factory and he didn't seem to mention anything about incompatibility, he just offered me one new from Mazda..

mx51982 · Postby **mx51982** » Mon May 31, 2010 6:15 pm

Here are the pictures guys. Hope they help!

93_Clubman · Postby **93_Clubman** » Tue Jun 01, 2010 1:55 am

assuming your mx5 is a 1998, 1999 or 2000, can't tell definitely from those pics if the head is nb8a, but the intake manifold is nb8a - while an na8 intake manfold can be modified to fit nb8a head, it would be more difficult to modifiy an nb8a intake manifold to fit an na8 head. have seen an nb8a head with the 2 pin temp sensor, but that doesn't explain why the unplugged plug is for a 3 pin sensor, unless the original temp sensor was damaged & replaced with wrong sensor, or it's not the temp sensor plug, or head was changed over sometime in the past, already leaving the 3 pin plug spare. if the latter then some way was found to connect the temp sensor assuning it worked prior to the latest mechanical work being done. btw, to confirm head is nb8a 'bp4w' will be cast on the rear.

mx51982 · Postby **mx51982** » Tue Jun 01, 2010 2:50 pm

NB8A. Purchased off one owner, elderly man and his wife, seemed very honest. I mean i only changed the head for my own peace of mind so there was nothing previously wrong. Is the code visible without the engine removed?

93_Clubman · Postby **93_Clubman** » Tue Jun 01, 2010 8:54 pm

mx51982 wrote:NB8A. Purchased off one owner, elderly man and his wife, seemed very honest. I mean i only changed the head for my own peace of mind so there was nothing previously wrong. Is the code visible without the engine removed?

What month & year NB8A according to built & compliance plates?

How do you mean "i only changed the head for my own peace of mind so there was nothing previously wrong"? Are you referring to the very recent work done by a mechanic or something else? And if there was nothing wrong why "change the head"?

You should at least be able to see part of the code with good light or feel the outline with your fingers.

Also, were the oil & temp gauges previously working?

mx51982 · Postby **mx51982** » Tue Jun 01, 2010 9:20 pm

Oh its pre october 2000. I mean the the car is ten years old, i thought i would have the head reconditioned. I do it with most cars that i own. It may sound a little pretentious but hey thats just me.

They were all working previously, i know for a fact!

93_Clubman · Postby **93_Clubman** » Thu Jun 03, 2010 9:04 am

Entirely your choice ref reco head - use of the word 'changed' caught my eye in the context of your original question.

mx51982 · Postby **mx51982** » Thu Jun 03, 2010 8:58 pm

93_Clubman wrote:Entirely your choice ref reco head - use of the word 'changed' caught my eye in the context of your original question.

Oh my mistake, well yes reco but like it has been said i am suspecting he has changed it!

93_Clubman · Postby **93_Clubman** » Fri Jun 04, 2010 1:05 am

mx51982 wrote:but like it has been said i am suspecting he has changed it!

Indeed that was my thinking on page 1, but it's not that easy to get an NB8A head as they're few & far between & expensive! Might be worth checking the engine number to see if still as per the rego paper.

mx51982 · Postby **mx51982** » Tue Jul 20, 2010 11:37 pm

I would just like to thank everyone for their help. I have changed the plug and the problem is fixed. The oil pressure gauge is still giving me trouble, i will create a separate thread for that issue.

All i did was replace the plug with the correct one and the car began to function like normal, idle speed was at 1000 rather than 2000, and starting is much better. I have yet to check engine numbers, i will get around to it tomorrow!

Again, thank you!
mx51982