What happens during a standard engine rebuild?

When you call, email, or fax for a quote for our standard engine rebuild (rebuilding the engine longblock) we send you a detailed initial estimate based on the average needs (labor and part-wise) of other similar type 911 engines we have rebuilt over the years -- plus all the normal new parts, down to the small parts, such as metric hardware. Then when your engine arrives, we take the longblock completely apart and make detailed measurements of the internal parts, and document them on a worksheet. Sometimes some engines will need a few more things.

At that point, we give you your updated estimate as well as higher and lower cost alternatives to help keep the overall cost of the rebuild as reasonable as possible. This is really the only way to do this, as nobody can predict exactly what a particular engine will need after 20, 30, or more years in service, possibly several car owners, one of which may not have taken good care of the car. On the other end of the spectrum, for engines with an unknown history, certain engine parts may have already been recently replaced. (Usually things like service items, oil lines, etc.) In this case, we report this, too, and delete those parts from the work order.

We have contacts nationwide to find good matching used parts at a reasonable price, should you lose, for example, a cylinder head (that would be very expensive new from the Porsche dealer), again to help keep the overall costs of the engine rebuild as reasonable as possible.

Paul also is a machinist and does high quality work on many of your engine parts, like all the machining operations required to recondition your cylinder heads, hone the cylinders, balance engine parts, and much more.

Some machining operations have to be sent out (like crankshaft regrinding and renitriding (rehardening), and those jobs are done by the best machine shops in the area with many years of experience working on Porsche 911 parts. Paul Weir does all the inspecting of your parts with high quality measuring tools and equipment, documents them on preprinted engine build sheets, and decides how best to re-machine, repair or replace the part. He informs the other shop exactly what he wants them to do to obtain a high quality result at the most reasonable overall cost.

We have contacts nationwide to find good matching used parts at a reasonable price, should you lose, for example, a cylinder head (that would be very expensive new from the Porsche dealer), to help keep the overall costs of the engine rebuild as reasonable as possible.

Once rebuilt, your engine should operate for another 10 to 15 years or longer, depending upon how much and how hard you drive your car. We use mostly high quality OEM German-made parts in our rebuilt engines. Paul Weir gives a 2-year/24,000 mile warranty on your rebuilt engine.

We try to reuse and rebuild everything we can to keep costs reasonable, but if a part is worn out, damaged, or missing (and that part is critical for proper functioning of the engine and its cooling systems, etc.), it must be re-machined, rebuilt, repaired or replaced with a good used or new part(s).


Labor performed

A detailed labor description is provided with your engine rebuild estimate.


Parts replaced

New main bearings
Rod bearings
Intermediate shaft bearings
Reuse #8 bearing if OK
New crankcase main oil galley plug
New rod bolts
Piston rings
2.7,3.0 Turbo and Carrera 3.0
   get new flywheel bolts
Timing chains
Chain ramps
Exhaust valve guides
Intake guides (if needed)
Complete gaskets and seal kit
New cam oil splash plugs
New cam oil lines
Oil return tubes
Oil pump lock tabs
Oil pressure switch
Oil vent hose (additional $ if bad on 930’s)
Heater hoses
All belts
Sparkplugs
Crankcase locknuts
Valve cover locknuts
Chain cover locknuts
Exhaust nuts at exhaust ports
   (turbo engines get additional exhaust hardware)
Other engine hardware as needed
Threebond 1194 crankcase sealant
Brad Penn Penn Grade 1, Valvoline VR 1 Racing or
   SWEPCO 306 synthetic engine oil and filter;
   there may be others that would be acceptable


Machine work performed

Remove crankcase main oil galley plug
Install crankcase main oil galley plug
Polish crank
Resize rod big ends if needed
Re-hone cylinders
Replace exhaust valve guides and intake guides if needed
Ream new valve guide bores, of course honing for valve guides and stems is available
Regrind intake and exhaust valves
Regrind valve seats
Perform precision 3-angle valve job to Porsche specs
Machine head gasket sealing surfaces flat
Remove cam housing oil spray tubes
Install cam housing oil spray tubes
Install new oil spray tube plugs

On a 2.7 engine we remove the headstuds, line hone the mainbearing bore, drill out the headstud threads, install bigserts, and re-machine the crankcase cylinder bores round and seats flat.