|Targets of Opportunity:
(inspections) (plus + the related, 1 cylinder
is low deal)
You are here for any reason, service, Tbelt swap, failed compression. etc.
With valve cover off: (blow the spark wells out on the 16v, before doing this or get sand grit in to the engine.)
Make sure the 16v cam cap bolts are not loose? 89 inch lbs, some books have this stated wrong, it's INCH LB's NOT FOOT ! As one GM book states. (ouch)
The 8v has Phillips screws on the rocker rails that like to come loose , rumor has it Suzuki started staking them , at some time later (?) in production. I use loctite
Check all head bolts are at spec torque., (all the ones you can reach) 52 foot/lbs. (if you find 1 loose , do not skip checking them all. The bolts are not TTY
Roll the engine by hand , makes sure the cam lobes lift all the same height. looking for flattened lobes. ( spark plugs removed make this easy)
Look at each cam lobe for extreme wear.? Polishing patterns are ok.
Look at each valve spring, to see if a coil is cracked or broken?
Look at each valves keeper , none missing? or stuck 1/2 way in?
Look for metal shavings about the area.? or green or orange AF coolant floating about, ,or for oil that looks like Chocolate Mousse.
Look at the rocker followers , they have spring clips (16v does) and none of these missing or broken or half missing.
With the Timing belt cover off: (for any reasons)
Make sure that large 17mm bolt in the center of the crank pulley has 94ft/lbs , of torque, the TSB covers that new torque, all G16 engine. (a deep wall socket is needed)
If said bolt was loose, discovered below < 50 ft/lbs ?, then make sure the key, on this crank snout cog is not sheared or worse?
Worn timing belt, split , shredded, or slipped, (do sneak a peek check.) USE GATES BELTS.
idler loose? or its index missing or broken off, in the tension slider device. (under roller wheel tension device)
Loose cam wheel bolt.? 46ft/lbs
Leaking oil seals cam or crank.
Roll the crank , with the starter motor, spark plugs out), and watch the belt to see if it tries to walk off the cog wheels. It must not.
If motor don't run or runs bad, make sure the false key slot in the cam sprocket were not used, (there up to 2, marked "I" ,that must not be used.)
80 PSI compression on all 4 jugs is the classic , TBELT slip, it was never serviced at 60,000 miles or owner didn't use a GATES belt.
Got on JUG (cylinder) way low say #2 is 35PSI, during a compression test.
I use a leak down tester, and listen to where the leak is going.
If I had low compression on say #2 and 3 jugs, that be classic bad head gasket, between the 2 cylinders
But the targets of opportunity are , in this case are...
VC off. (valve cover.)
On the bad jug, pretend #2 compression (WOT) is very low: (only it)
During the cylinder leak down test you see 15% leakage, At TDC, then walk the piston down with a breaker bar at 17mm crank bolt, fighting the pressure.
Near the bottom the exh opens, but before that the leak rate is 15% all the way down, if not , bad cylinders. Watch the cam lobes to see when exh starts to move.