tec ohv16 lifter

13 years ago

Anyone, Walt, ...
Recently got a ariens 1640h given to me that had no compression. Took the head of and the exhaust seat was out and holding the valve open. Peened it back into place, put the head back on and cleaned out all the plugged up fins. Engine started right up and seemed to run ok until I put a load on it and then it would die. Took the valve cover off and found the the exhaust push rod was out of place and got the piston up to TDC to reset the valve lash but couldn't get the push rod to sit correctly so took the head off and found the lifter was stuck in the up position. Got a punch and gave it a tap and it freed up and seemed to work so put it back together and fired it up and same thing happened.
So, question is, knowing the seat probably came out due to overheating, could the overheating cause the lifter to stick, and , are there any recommendations for fixing and preventing this?
Thanks in advance,
JBH

Sort by:Oldest

Comments (2)

mownie
13 years ago
Well, about the only thing that might cause a lifter to stick that hard (considering it has a valve spring to return it) would be galling of the lifter in its bore, or an extremely heavy build up of varnish.
Galling is less likely than varnish because I would bet that an oil deficiency would seize a crankshaft or a piston first.
But either way, a sticking lifter needs to be removed from the engine for close inspection.......and that means a tear down (if you desire to go that far.
My first approach with an engine in this state would probably be to drain the engine oil and see what sort of metallic residue comes out with it.
If you get loads of aluminum particles, consider the engine "trashed".
jbhl4
Original Author
13 years ago
Ok, I'll go that route. Most likely varnish, engine has a lot of hours on it. Tear down it is, I don't mind tinkering as it was free.
Thanks for the response.
JBH
Related Professionals
Lake City Landscape Architects & Landscape Designers · Morgan City Landscape Architects & Landscape Designers · Annapolis Landscape Architects & Landscape Designers · Chico Landscape Architects & Landscape Designers · Yakima Landscape Architects & Landscape Designers · Salina Landscape Contractors · Elkton Landscape Contractors · Austin Landscape Contractors · Evanston Landscape Contractors · Hilo Landscape Contractors · Valdosta Architects & Building Designers · Mount Vernon Architects & Building Designers · Gulfport Architects & Building Designers · Lawton Architects & Building Designers · Mesquite Architects & Building Designers