My M30 swap, few Q's
Moderator: martauto
Had a look at the car today. Linked pin 30 and 87, the fan runs, but not when the relay is in and engine upto 3/4. But the when the temp does get to 3/4's it blows out the cap. I put a new cap on it aswell. What's going on?
Just been out and tested the wiring to the switch. Used a piece of wire to joint the contacts and the fan came on. The plug that goes into the switch has three pins, and I am only using a single speed fan so only using two of the pins. I was previously advised to use pin 1 and one of the others as they would be for the different temperature (80/88 ). But just now wired pins two and three and the fan came on, which leads to the next problem.
The fan cools the radiator fine once it's on, but sometimes it doesn't come on then the car overheats and we get the coolant blowing through the coolant pressure cap again. Could I have air in the system or is the head/headgasket knackered?
The fan cools the radiator fine once it's on, but sometimes it doesn't come on then the car overheats and we get the coolant blowing through the coolant pressure cap again. Could I have air in the system or is the head/headgasket knackered?
Last edited by chu346 on Fri Feb 11, 2011 7:13 pm, edited 1 time in total.
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Rav335uk
- E30 Zone Meets/Events Team
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If it's cooling the engine and it runs on normal temp, then I would think the h/g is fine.
You have to remember, this thing is a big engine in the small e30 bay.
I would look at the relay again and make sure that its working.
Pull off the orange cover, plug in the relay and run the car.
Then operate the relay and see if it's doing it's job.
I've done this in the past when I thought the relay was dodgy.
You have to remember, this thing is a big engine in the small e30 bay.
I would look at the relay again and make sure that its working.
Pull off the orange cover, plug in the relay and run the car.
Then operate the relay and see if it's doing it's job.
I've done this in the past when I thought the relay was dodgy.
If you Got "Haters",Then your doing something Right!
CR24v??? Where's it all gone?? LOL
As I said, the fan is not coming on consistantly. The relay is fine. I think it is to do with air circulating around the temperature switch causing it not to turn the fan on. What I need to know is if this is trapped air in the system or headgasket problem or something else?chu346 wrote:The fan cools the radiator fine once it's on, but sometimes it doesn't come on then the car overheats and we get the coolant blowing through the coolant pressure cap again. Could I have air in the system or is the head/headgasket knackered?
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Rav335uk
- E30 Zone Meets/Events Team
- Posts: 27985
- Joined: Wed Jan 19, 2005 11:00 pm
- Location: Mad mad mad
- Contact:
Try holding the expansion tank higher than the engine, and open the bleed screw, you may still have air in the thermo housing.
If you Got "Haters",Then your doing something Right!
CR24v??? Where's it all gone?? LOL
The engine was is out of a working car so unless the thermostat has gone wrong it should work fine. The radiator heats up fine. I think it might just be air in the system. I'm going to try and bleed it again now.
