Vtec solenoid valve

rick82 · Post by **rick82** » Fri Sep 12, 2014 9:38 pm

Hi

I have a cel code 21 which comes on after about 40 mins.
What's the best way to approach this? Is the solenoid serviceable or will it just require a new one?

Thanks

Post by **Donald** » Fri Sep 12, 2014 9:41 pm

IIRC @vtecmec and @K30DPC have recently had theirs in bits.

Post by **Vtecmec** » Fri Sep 12, 2014 9:54 pm

The spool valve is serviceable, but not the solenoid.

http://www.ludegeneration.co.uk/post213 ... ve#p213599

Post by **Vtecmec** » Fri Sep 12, 2014 9:59 pm

It's probably worth checking the wiring and connectors to the solenoid if the fault is intermittent.

rick82 · Post by **rick82** » Fri Sep 12, 2014 10:16 pm

I did check the wires around the solenoid but they all seemed ok. Just now the cel came on after about 10 mins so it is either intermittent or it's failing.

Post by **Thebusofwoe** » Fri Sep 12, 2014 10:34 pm

If your sure the wiring is ok I bet its the solenoid. If the fault code is coming up under normal driving (no vtec) then it will be detecting a internal fault in the solenoid

K30DPC · Post by **K30DPC** » Fri Sep 12, 2014 10:39 pm

^^ what he said. It's rather not mechanical issue as this valve dosn't send to ECU any feedback. So if it was found as faulty my money will go for electrical issue. And I'm quite sure you can get used one from here for few pounds

Post by **Doggo** » Sat Sep 13, 2014 12:49 am

These guys will know more than me, but I seem to recall a filter/gasket associated with the vtec solenoid which is an easy swap and apparently causes problems fairly commonly? Anyone? Anyone?

[youtube]uhiCFdWeQfA[/youtube]

Post by **vanzep** » Sat Sep 13, 2014 9:20 am

There are two gaskets with metal mesh filters - one of them is clearly visible when you take the solenoid/valve off and one that sits under the solenoid - you can get to this one by undoing the 3 screws that hold the assembly together. Normal procedure is to take them out and clean it all down with something like carb cleaner. Might be worth doing that first.

Just be careful taking the gaskets out as they are expensive to replace.

K30DPC · Post by **K30DPC** » Sat Sep 13, 2014 9:49 am

vanzep wrote:Just be careful taking the gaskets out as they are expensive to replace.

All depends what expensive means for you

IIRC they around £20 for both. One is available from your local honda dealer, other one unfortunattely isn't. I mean they will sell you one but it doesn't fit. So you must buy it from here
http://www.ebay.co.uk/itm/221394741240? ... EBIDX%3AIT