All cylinder values were within tolerances, so we only replaced bearings. (The engine should not have been taken apart in the frst place, but back then I knew nothing and did how I was told.)
Pistons also new because one skirt showed some wear and I could not find a better single replacement...
Thank you all so far, let me be more percise on the problem. It indeed is the Piston Ring Side Clearance. On the first attempt, when trying to fit the oil scraper rings on the 10046106 pistons, there indeed was back clearance issues. Since one piston was a bit worn and my workshop hat some new...
Reassembling my Volvo Penta AQ271C after honing, the piston rings I purchased (Sealed Power Performance Piston Ring Sets E251K) don´t seem to fit. The piston is a GM piston p/n 10046106, I assume there are the original ones.
With this piston the oil scraper rings were too wide, the piston ring...
The difference seems to be the cam side:
- flat tappet -> bigger diameter on holes of the cam sprocket
- roller tappet -> smaller diameter
Called Cloyes today, the guy gave me two options
Cloyes Street True Roller Timing Sets 9-1157
Cloyes Original Race True Roller Timing Sets 9-3157
9-3157...
The diameter of the hole in the middle of the cam sprocket is smaller and the diameter where the holes for the screws are is also smaller on the Vortec cam sprocket.
I also have a AQ271C (pre vortec) in parts here, there the CLO-C-3023X with the larger diameter fits well. Maybe Vortec and...
I see GM offers only one timing set: Single Roller Timing Chain Kit
this is the same set that summit suggested with the part number 12371043.
If this is indeed the stock truck part, then the mappung of the GM and the Volvo Penta part numbers would be like this
chain GM part number 14088783 ->...
I understand and agree to your idea of "oversizing" things. This is why I purchased the double roller (that doesn´t fit). But since the engine ran well the first 30 years with the single and cheap stock part, I thought that would be fine for the next 30 years.
The list you provided does also...
I would like to replace the timing gear on the Volvo Penta 5.7GXi I´m building. I am using a old GS engine block, but the part numbers of the parts seem to be identical:
3856114 cam shaft sprocket
3852685 chain
3852690 crank shaft sprocket
On the cam sprocket I took off the GS it says 12552129...
What I liked about the hi-Teks is that they have the brackets for alternator or fuel filter exactly matching the engine setup. Barr, Eddie marine or stainless marine don’t have this, I assume.
I was absolutely in love with the australian exhaust system from Hi-Tek because of its look and the guarantee that never again the failing gasket will kill my engine.
But I can´t manage to get one from them that fits, the HT-28 provided by them is too low, not matching with the Y-pipe from the...
I have not changed seats, these are genuine in a ‘89 engine. I just replaced the valves. I don’t know for sure and I don’t have good pictures, but it looks if they were this way when I pulled them off.
I’ve ordered the valves according to measurements from the old valves. Summit racing was not...