[Samurai81]

I've just bought a '99 Jimny with 70 K on the clock. I'll be doing a cam belt shortly but can anyone tell me if this is an interference motor or will it die quietly if the belt goes?
Steve.

[Gwagensteve]

It is not an interference motor. As far as I know all G series motors are free spinners.

Steve.

[Samurai81]

Thanks Steve. I've had a few "A"s but this is the first computer controlled 1300 I've had to deal with. Steve.

[fordem]

Gwagensteve wrote:

It is not an interference motor. As far as I know all G series motors are free spinners.

Steve.

The SOHC 8v is non-interference, the DOHC 16v IS an interference motor, and I would not take the chance with the SOHC 16v.

[mnemonix]

fordem wrote:

The SOHC 8v is non-interference, the DOHC 16v IS an interference motor, and I would not take the chance with the SOHC 16v.

Which factory original Suzuki DOHC 16v are you referring to?
If you build a hybrid G16/G13b and end up with an interference design (which you do), that's your own damn fault.
Anyone building hybrid engines should have the know-how to keep themselves out of trouble with something this simple.

G16a SOHC - definitely non interference, like all factory G series engines.

[Rhinoman]

The G13BB is a non-interference engine.

[Samurai81]

Thanks guys. My Jimny is an unmodded G13BB. Nice and simple. Unfortunately it was abandoned by the PO (American actor who failed to make it on Lord of the Rings/Hobbit). I'm now getting it re-complianced and the last thing I want is for the cam belt to snap and cause mechanical problems. Over here our compliancing regulations means it has to appear like a new vehicle. What a nightmare task! I'm nearly there but our pedantic inspectors, at the only place that is approved to do this, keep finding more small things to correct. Today's fault is "rear brake imbalance" even though 9 days ago they tested the brakes and they were spot on!
Steve.

[fordem]

mnemonix wrote:

fordem wrote:

The SOHC 8v is non-interference, the DOHC 16v IS an interference motor, and I would not take the chance with the SOHC 16v.

Which factory original Suzuki DOHC 16v are you referring to?
If you build a hybrid G16/G13b and end up with an interference design (which you do), that's your own damn fault.
Anyone building hybrid engines should have the know-how to keep themselves out of trouble with something this simple.

G16a SOHC - definitely non interference, like all factory G series engines.

May I safely assume that since you mention a hybrid G16/G13b that you're aware that Suzuki built a 1.3 DOHC 16v engine commonly known as the G13b, and fitted to the 89~94 SF413 Swift GT/GTi ? Hopefully that meets your definition of "factory original".

May I also take this opportunity to point out that the topic of this thread is the G13BB SOHC 16v engine and not the G16a SOHC?

[droverdave]

I think its best to treat all engines as interference engines.

Even when working on engines that you know arent interference you just dont want to take the risk of bending a valve. Once you take that belt off, don't move a thing. This way you can't be caught out.

[Gwagensteve]

I think that's good advice, but the specific issue is "is the engine going to break if the timing belt breaks" and for all sohc g motors the answer is no.

Steve.

[mnemonix]

Fordem: Right you are mate, sorry. Was a late night at work and for some reason I read your "DOHC 16v" as "DOHC 1.6litre", my bad.

[droverdave]

Gwagensteve wrote:

I think that's good advice, but the specific issue is "is the engine going to break if the timing belt breaks" and for all sohc g motors the answer is no.

Steve.

What about if the head has been shaved? I always worry that with such engines that over the years the head has been shaved enough times to make it interference. Especially if you dont actually know the history. Probably not worth worrying about though.

[Gwagensteve]

If the head has been shaved enough to make it an interference motor , it was an apparently otherwise stock G13BB running stock management it would already be broken.

Steve.