The design of the 8 valve Porsche 944 engine differs from most engines when it comes to the valve encompass.
Dissimilar traditional designs where there is a split up valve cover that just covers the valve railroad train and tin be removed to service the valve railroad train and camshaft(s) the "valve cover" on the 8 valve 944 motors actually houses the camshaft and lifters. Removal is not difficult but does involve more work than that of a traditional motor.
Hot tip
Make sure engine is at Meridian Expressionless Center
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Project Photos
Figure 1 To remove the camshaft housing you will offset demand to remove the fuel rails (red arrow). Delight encounter our article on fuel rail removal for additional data.
Figure 2 You will also need to remove the distributor cap (ruddy arrow) and the timing and residue shaft belts behind the front end encompass (cherry-red pointer). Please see our commodity on these procedures for farther aid.
Figure three With the timing belt removed the cam sprocket should be set at Superlative Dead Center (green pointer). The cam sprocket (red pointer) and the benefactor housing (yellow pointer) will come up off with the camshaft housing. We had removed the cam sprocket and benefactor housing to repair the camshaft oil seal but you Exercise Not need to remove the sprocket to remove the camshaft housing.
Figure 4 Utilize an 8mm Allen and remove the 6 plugs or cover screws in the superlative of the camshaft housing (reddish arrow). Make certain to "wake up these bolts by seating the socket firmly and fully in the bolt head and then giving them a tap or two with a hammer.
Figure 5 You volition need a long 6mm Allen to remove the Allen bolts below the openings in the housing. Try non to use a socket on an extension, every bit you do not desire it falling off inside the camshaft housing. Make certain to "wake upward these bolts by seating the socket firmly and fully in the bolt head and and so giving them a tap or two with a hammer. You practise NOT want to strip these bolts inside of the housing.
Figure 6 Make certain you lot get both the commodities and the washer out when removing.
Effigy seven There is a subclass at the rear of the housing that holds an electrical port. Use a 10mm wrench and remove the bracket course the housing (red arrow).
Figure 8 Before removing the lower bolts, information technology is a skillful idea to become the power steering reservoir out of the manner. Apply a flathead screwdriver and loosen the clamp holding it in place. Slide the reservoir upwards and out of the way; there is no need to drain it. There are nine bolts that hold the bottom of the housing to the head (xanthous arrows) and two of the bolts concur the coolant line (green arrows). You will demand a combination of long and short 6mm Allen's to remove these.
Figure 9 Make certain to "wake upwardly" these bolts past seating the socket firmly and fully in the commodities head and then giving them a tap or two with a hammer. You exercise NOT want to strip these bolts as the previous owner of our project motorcar tried to practice (red arrow).
Figure x Removing the housing is a chip tricky and improve handled if you can go a friend to help. The lifters sit within the camshaft housing and will want to fall out when removing the housing (red arrow). If you are reusing the lifters y'all volition desire to keep them in guild and at the very least make certain they do not fall out into the engine or on the flooring. Tilt the head dorsum as you lot remove it, making every effort to continue the lifters in place.
Figure 11 Remove the former gasket from the head (ruby-red arrow).
Figure 12 Make certain to clean the housing and caput (cherry-red arrow) mating surfaces well. Do not use anything metal on the matting surfaces. Plastic and Scothbrite cleaners are adept to use. Make certain when installing the new gasket that it is oriented correctly so every bit non to block the oil passages.
Figure 13 When getting ready to install the housing information technology can be a good idea to identify a picayune grease or assembly lube on the lifters (red arrow) to aid hold them in place while you install the housing back on the head.
Figure 14 Brand sure the camshaft marking (crimson pointer) is lined up with the TDC marking on the distributor housing (yellow arrow) before installing the housing. Failure to exercise this will cause the cam to try and strength some valves downwards onto the pistons and can consequence in damage.
Figure 15 Place the valve housing on the caput making sure it lines up with the alignment pins. The housing will not sit affluent on the head equally the cam volition exist trying to push downwards some of the valves; this is normal and the cam sprocket may move slightly while you are tightening everything downwardly just that is normal and OK. When installing the bolts, try placing a small amount of grease to the end of the 6mm Allen. This will assist hold the bolts in identify while getting them inside the housing. There is no official tightening sequence merely brand sure to tighten the fasteners in an order that pulls the embrace down onto the caput evenly.
Figure 16 Do non forget to install the beat out washers on the cover bolts or you will get oil leaks (cerise pointer). Installation of the rest is the reverse of removal.
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