BX24 - Won't Start

[Ngiovan]

Hi all,

Just got my BX24 home today and started some diagnostics. For more background on the purchase, check out this thread.

Pulled the glow plugs (pics attached) and ran a compression test on each cylinder.

• Cyl. 1 (frontmost) came in just a shade under 200psi
• Cyl. 2 (middle) jumped up to about 600psi when cranking, but would not hold a reading at all. Just bled out
• Cyl. 3 (rearmost) read up to about 400psi but also bled right out

I saw a few recommendations on checking intake/exhaust for leakage there, or diving into the valvetrain to see if clearances are out of spec.

Any ideas on where to go next?

 

[85Hokie]

The 200 is way low ............. surprised that it DID start when it did.

NOW 600 is crazy high - 420 is low min - and max should be something close to 450+

YOU ran a compression test? OR a leak down test? If a compression - the gauge is bad IF it leaked down!!!

IF leak down - you needed to have each at TDC to get accurate reading..... and 600 psi is very high.

 

[North Idaho Wolfman]

Pull the motor and start tearing it down.
You more than likely have a broken piston or a bent rod.

 

[Ngiovan]

The 200 is way low ............. surprised that it DID start when it did.

NOW 600 is crazy high - 420 is low min - and max should be something close to 450+

YOU ran a compression test? OR a leak down test? If a compression - the gauge is bad IF it leaked down!!!

IF leak down - you needed to have each at TDC to get accurate reading..... and 600 psi is very high.

Thanks for the feedback!

A compression test is what I attempted. Got a diesel-specific kit with the correct fittings into the glow plugs.

After your comment I went back and ran again and getting pretty much nothing on all 3 cyl.

I'm thinking I'll start by taking the head off tomorrow and see if there's any further damage.

Thanks!

 

[Ngiovan]

Pull the motor and start tearing it down.
You more than likely have a broken piston or a bent rod.

That was my expectation going into the purchase, but wanted to make sure I checked all the diagnostic boxes once I brought it home.

Thanks!