Help! Wisconsin VH4D

PAQ · Jul 11, 2012

Let me quickly recount the nightmare. Engine driving Heston 310 fails spectacularly. Crankshaft broken. Sent to rebuilder as core for rebuilt short block. Came with wrong crankshaft could not use, sent it back, twice. was very specific about requirements the first time. Hayed with borrowed cutter bar. this spring have block with correct shaft assembled rest of it mounted it on Heston. Started governor broke. Had to replace pin it rides on and governor. Think the one that broke must have been damaged when I got it as I had some problem getting it together. Seemed tight in cam gear. reassembled, 30 PSI on cylinder 2 and 4 replaced head gasket. seated valves, checked for broken rings. 30 PSI in 2 and 4. Could this engine have the wrong cam shaft in it as I am highly suspicious of the valve timing. Could the crankshaft gear have spun on the shaft breaking the woodriff key and messing up the valve timing? The timing marks are in the apparent correct alignment. Help please the hay is getting a little over ripe and I"m personally affronted by this engine.
What am I missing?

greygoat · Jul 12, 2012

A lot of Wisconsin 2 cyl, and V4 parts are
interchangable, such as valves, pistons, but I
don't know about camshafts. Ultumately, only a
casting number will tell you what you've got.
Models VE4D and VF4D, differ only in bore and
use the same camshaft. VH4D and VG4D and all the
rest of the V4 family have their own part #'s,
but who can say if they will fit? All camshaft gears except VE4D and VF4D have different part #s
per master parts book.
Per the low compression? have you checked for
worn out or "Tapered bore"? I usually find that
on hay bailer 2 cylinders.

Tramway Guy · Jul 12, 2012

What is the compression on 1 and 3?

If you had a cam from a VE/VFD engine, it very well might cause the symptoms you describe, as the uneven firing engines obviously had very different valve timing from the VH4D engine.
I suppose you observed the valve timing while cranking the engine over with the head off?

JOB · Jul 18, 2012

As Tramway guy said turn the engine over by hand with the heads off and watch the valves open and close in relation to the piston. I had rebuilt a VP4 years ago and had no or little compression on two cylinders. By watching the valves in relation to the piston moving up and down I discovered the camshaft was worn out. Installed new cam and the engine ran fine.

Help! Wisconsin VH4D

PAQ

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greygoat

Well-known Member

Tramway Guy

Well-known Member

JOB

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