Re: V8 pistons
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Forum Ambassador
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That Carib mentioned in posts #9 and 10 of this thread is 5699-1203 and was much-discussed on this forum some years back. It carries a "D code" on the build slip/shipping order meaning it was re-designated 3 times, the only such Carib as far as I know though there are many that were redesignated twice. And it did have a special order interior. When it was redesignated the last time the only export equipment it retained were the heavy duty shock absorbers and the compression-lowering cylinder head shims, this according to the 56 Caribbean build-slip analysis published in TPC, Autumn 1987.
Posted on: 2014/1/3 19:31
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Re: V8 pistons
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Home away from home
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Thanks for the replies.
I still wonder how many engines were low compression? I know there were engine codes by series, was there one for export/low compression? OD I can not find the discussion, on this site about the car, but I have the PAC Cormorants look at.
Posted on: 2014/1/3 22:05
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Re: V8 pistons
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Home away from home
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WC,
Does your car have the original engine in it? According to a document I have, and is probably on this site, (I could not find it here) dated 4-16-56; "Export engines starting with 55th series have XH stamped on block between V just back of the water pump. Same location that Conners stamp engine number" Can you see this mark stamped on your engine?
Posted on: 2014/1/3 22:45
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Re: V8 pistons
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Home away from home
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Is there any data on standard compression vrs low compression engines?
Would someone think their engine is wrong because it was a low compression engine? Is there that much difference between low and standard measurements? Were there low compression export straight 8 engines? Is there data for the difference between the 2?
Posted on: 2014/1/4 11:38
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Re: V8 pistons
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Home away from home
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According to parts catalouge april 56 export pjstons are listed for 5540 ONLY. NO EXPORT listed for anything else 55 nor 56. Low compression listed for wverything EXCEPT 5540.
This begs the question: Only 5540 engines were exported regardless of model of car. Or to put it another way: very likes a 56 Carib for export got a 5540 engine 320cid!?????
Posted on: 2014/1/4 12:52
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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Re: V8 pistons
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Forum Ambassador
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Were there low compression export straight 8 engines? Is there data for the difference between the 2?
The export in-line eights of the postwar era that were offered with lower compression, this was typically accomplished with an extra-thick head gasket. These are listed in the parts listings and called "Extra thick and Export" gaskets. Check the 48-54 master parts list (5.0504) and you'll see them listed. They also appear in parts listings for other years. For example in the 35-41 parts list they show both extra thick (0.091" vs 0.060") as well as Export gaskets - different part numbers for both. In yet earlier years (for example 1933-36 Seniors) the engine themselves were offered in several compression ratios and perhaps the lower CRs were used for export cars to countries with marginal gasoline quality. Again just using 33-34 as an example, the engines were offered in 6.0, 6.25, 6.5, and 7.0.
Posted on: 2014/1/4 14:09
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Re: V8 pistons
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Quite a regular
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After scraping along the stamped motor number, I cannot find anything but 5682- 4747. However, I did find something interesting: the bottom layer of paint is Ivory. I used to have a '55 Patrician and this looks VERY familiar. I cannot get to the back of the motor for a casting date, due to health problems. Is there anything on the heads (number wise)that might be of significance? I have the valve covers off at the moment...
Posted on: 2014/1/4 14:12
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Re: V8 pistons
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Forum Ambassador
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Keith -
I completely missed those low compression and export pistons. Yet, there are no listings for complete engines, short blocks, or even 'cylinder and piston' assemblies to service export or low compression applications. Now, go back and look at the applications for the aforementioned shims. While a single intake manifold shim are covers all models, the two cylinder head shims (55 vs. 56) exclude the 5540 chassis, with 320-cid motor. It doesn't make sense to me that you'd need a shim for the intake if none were used for the head. I can't believe that they would have only put a 320-mill in all models for export. In fact, a road test of a 56 Clipper Custom (clearly showing RHD) published in the British magazine, Autocar, specs the engine displacement at "5,768 c.c. (352 cu. in.)". Another article (from an unspecified publication) features a 55 Clipper, but specs displacement as "5,243 c.c.", which equates to 320 cu. in. (rounded). These articles are included as part of a collection of reprints in Brooklands' Packard Gold Portfolio - a title listed in this site's Bookshelf reference. Meanwhile, I doubt if the parts catalog information was compiled or even maintained by just one person, which might account for some inconsistencies, though not necessarily such conflicting info. Is it possible, then, that they were using the terms low compression and export interchangeably or was 'low compression' equipment offered for domestic as well as export models?
Posted on: 2014/1/4 14:17
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Re: V8 pistons
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Forum Ambassador
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WC -
If there's no XH code on the build slip, it wouldn't be stamped on the engine. So, your (previously) export vehicle wasn't built with low compression equipment. Meanwhile, perhaps this post by member Ross (Miller): https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=96617#forumpost96617 ...explains the bottom layer of 'ivory' paint that you found.
Posted on: 2014/1/4 14:25
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