How do you replace the timing chain on a 1994 Ford Crown Victoria?

Answer 1

It has two chains. CAUTION: At no time, when the timing chain(s) are removed and the cylinder heads are installed, may the crankshaft and/or camshafts be rotated. Failure to follow these directions will result in valve and/or piston damage. NOTE: Because this is not a free-wheeling engine, and it jumps time, there will be damage to the valves and/or pistons and will require the removal of the cylinder heads. The camshaft sprockets should only be disassembled from the camshafts when one of the components is to be replaced. Remove Valve Covers, Oil Pan and Engine Front Cover. Remove crankshaft position sensor pulse wheel. Rotate engine to No. 1 top dead center (TDC). Remove two bolts retaining RH timing chain tensioner to cylinder head and remove timing chain tensioner. Remove RH timing chain tensioner arm. Remove two bolts retaining RH timing chain guide to cylinder head and remove timing chain guide. Remove RH timing chain from camshaft sprocket and crankshaft sprocket. Remove two bolts retaining LH timing chain tensioner to cylinder head and remove timing chain tensioner. Remove LH timing chain tensioner arm. Remove two bolts retaining LH timing chain guide to cylinder head and remove timing chain guide. Remove LH timing chain from camshaft sprocket and crankshaft sprocket. CAUTION: Do not rotate crankshaft and/or camshafts or possible engine damage may occur. Inspect the plastic running face on timing chain tensioner arms and timing chain guides. If worn or damaged, remove and clean oil pan and oil pump screen cover and tube. Installation NOTE: If engine has jumped time, make sure that all repairs to engine components and/or valve train have been made. Then rotate engine counterclockwise 45 degrees. This will position all pistons below top of deck face. Install Cylinder Heads as outlined. Locate the copper links on the timing chains. They will be 180 degrees apart fro one another on each chain. When installing the chains on the gears, line one copper link on the chain with the alignment mark on the crank gear, and line up the other copper link on chain with the cam gear mark on each respective side of the engine. On the crank gear, both chains line up to the same mark. Install timing chain guides . Install timing chain guide retaining bolts. Tighten to 8-12 Nm (71-106 lb-in). NOTE: Crankshaft sprockets are identical. They may only be installed one way. Install LH timing chain on camshaft sprocket. Make sure copper link of timing chain lines up with timing mark of camshaft sprocket. Install LH timing chain on crankshaft sprocket. Make sure copper link of timing chain lines up with timing mark of crankshaft sprocket. Install RH timing chain on camshaft sprocket. Make sure copper link of timing chain lines up with timing mark of camshaft sprocket. Install RH and LH timing chain tensioner and secure with two bolts on each. Tighten bolts to 20-30 Nm (15-22 lb-ft). Lubricate timing chain tensioner arm contact surfaces with clean engine oil, and install RH and LH timing chain tensioner arms on their dowels. With a suitable C-clamp around the timing chain tensioner arm and timing chain guide, remove all slack from timing chain while using caution not to bend the timing chain guide. Remove lock pins from timing chain tensioners and make sure all timing marks are aligned. Install Engine Front Cover, Oil Pan and Valve Covers. Start engine and check for leaks and proper operation.