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+--- Thread: Broken exhaust manifold bolt CM870 (/showthread.php?tid=5697)
RE: Broken exhaust manifold bolt CM870 - Signature620 - 01-16-2020
If the bolt is broken flush or above the surface of the head, I usually weld a nut on but put a washer over the broken bolt first - Helps you avoid welding the bolt to the head. Make sure you get a good amount of heat into the bolt and leave it to cool. It'll come out with ease.
RE: Broken exhaust manifold bolt CM870 - Chamberpains - 01-16-2020
Got it apart. No luck on the broken bolt bolt being any where close to reachable. Its broke off 3/8" in. I don't even know how a bolt breaks that far in. Threads look clean, so I'm hoping a good left handed drill bit will run it right out. [attachment=6110]
Looking at the valves I see a few of them are damp. Here's a couple picks of the worst ones. Anything to worry about or button it up and run it? This is a Cummins cert. Reman engine with about 200,000 on it.
[attachment=6111]
[attachment=6112]
RE: Broken exhaust manifold bolt CM870 - Chamberpains - 01-16-2020
Also, awhile back a couple of us brought up that some of these remans have heads with serial numbers hand welded on them. Figured I'd post a clear picture of what I'm talking about. Rawze brought up it may be a sign of funny business. Any thoughts?
[attachment=6113]
RE: Broken exhaust manifold bolt CM870 - Nostalgic - 01-16-2020
I'm open to correction, but those valves look dry to me. You'll always have some degree of dampness on the stems.
RE: Broken exhaust manifold bolt CM870 - Chamberpains - 01-16-2020
The dark black part is wet. The sooty black is dry. They're not soaked and the ports are dry. I have 6 the valves completely dry and the other 6 in different stages of wet half way down. I only posted 2 of the more wet ones.
I'm just curious is something I'll have to keep an eye on or is this par for the course on an ISX.
RE: Broken exhaust manifold bolt CM870 - Rawze - 01-16-2020
they looked fine to me.
you would know it if they were actually leaky. It would not be subtle
RE: Broken exhaust manifold bolt CM870 - Signature620 - 01-17-2020
Leaking ISX valve stems is very common and rarely worth fixing. Those rugged looking serials have been on the heads for ages. I'm using one right now on a rebuild that was a brand new head in a recon box - Has the same type of hand made lettering.
RE: Broken exhaust manifold bolt CM870 - Chamberpains - 01-23-2020
Just figured I'd post some pics of things.
The manifold that I took off. The EGR end wasn't sealing anymore to the center section. So I replaced all of it.
[attachment=6157]
The new manifold with the EGR port gone. Uni hooked me up with a guy. Thanks again. Slid right in and worked perfectly. Bolts get torqued in sequence @ 44 ft/lb
[attachment=6158]
The YTS turbo showed up today. Looks and sounds great. I replaced all hoses and pipes even though some were still good. I'm not planning on dealing with them "piece meal" failing on the road.
[attachment=6159]
This whole job can be handled by anyone with patience, a few torque wrenches and ambition to keep your money in your pocket.
RE: Broken exhaust manifold bolt CM870 - tree98 - 01-23-2020
Re torque your manifold bolts after about 5 days of use. I torqued all mine in sequence but they all loosened up and had to re torque, been fine since.
So how did you get the broken bolts out?